Hydrofluoric Acid (HF) Hydrofluoric Acid (HF) is a highly corrosive inorganic acid. Following flushing, the technician, who appeared to be in severe pain and shock, immersed himself in a chlorinated swimming pool at the rear of the workplace, where he remained for approximately 35-40 minutes before ambulance help arrived. 65�LZS�����q ����=GÖD����G�\]"�lB+�c�|F�c��@ Hydrofluoric acid (HF) can form a toxic cloud at room temperature while exposure can lead to severe health problems and even death. Hydrofluoric acid causes painful tissue inflammation and necrosis on contact. Sensitive viewers beware images of HF acid burn damage to hand and legs. The DIGEST is a newsletter published by the Universities Safety Association. death will result from depletion of calcium from blood and tissues. ?��Gդ�#8���f��87r$ƼyU�F�!P���W�L�Jf�P�)�GD����e�/dr@����wܖby�d��;2�Y9��A%�o%ө[`LG�*=�8��pe}�;O��X��hF* n`e�� �`?�" If the penetration is sufficiently deep, decalcification of the bones may result. Severe health effects or death will result from depletion of calcium from blood and tissues. Inhalation of HF produces an immediate injury to the lining of the lungs with hemorrhage pulmonary edema and death. HF Acid Attacking Bone matter. The toxicity of HF and HCl are very different. Head, Undergraduate Information: Dr. Beatriz Cisneros, Chemistry Advisor, An equal access/equal opportunity university. No calcium gluconate gel was applied following dermal exposure. Safety shower and emergency eyewash must be available in or near the lab. m���OOaFFB��������c�`$��ZK˲�/���v�՘q�#+�zv*=��0G�2J�T�]q��#��I�A� �� #�q��XFB�Tv>� AJ^;D����^R@���,����Z�U��� ��OIp�z\y+�!�g#�n�c����� ���35��\��X�Ιo笔��,`Hp���F�8-l ȵ�8�| DO NOT confuse hydrofluoric acid with hydrochloric acid (HCl). 1 Deaths have been reported from concentrated acid burns (involving ≥ 50% HF solutions) to as little as 2.5% of body surface area, which is equivalent to approximately one hand and forearm. info@safetorrancerefinery.org! 40, No. However, HF is not only a strong corrosive, but also highly toxic towards higher concentra- tions: Local effects include tissue destruction and necrosis, deaths have been reported from concentrated acid burns to as little as 2.5 % body surface area. Refinery Explosions Raise New Warnings About Deadly Chemical Chemical experts say recent refinery explosions could have been far more devastating if deadly hydrogen fluoride was released. �3���[����we�YB����yF�&�e;Y�|�Bos It has been estimated that death due to HF poisoning can occur if as little as 2.5% of the body comes into contact with concentrated acid (the palm of the hand represents approximately 1% of body surface area). 1341-49-7), a chemical that dissociates into HF when dissolved in water and therefore has similar toxicity. Waterstoffluoride, fluorwaterstofzuur of vloeizuur is een zeer corrosief zuur met als brutoformule HF. Solutions of HF are colourless, acidic and highly corrosive. Investigation showed that this death could have been prevented if adequate personal protective equipment had been worn during the handling of concentrated hydrofluoric acid. Unlike other mineral acids, hydrofluoric acid will attack glass, concrete, rubber, quartz and alloys containing silica. Contact with the eyes could result in blindness. HF is similar to other acids in that the initial extent of a burn depends on the concentration, the temperature, and the duration of contact with the acid. If HF is not rapidly neutralized and the fluoride ion bound, tissue destruction may continue for days and result in limb loss or death. The chemical known as HF has the ability to penetrate the skin tissues deep to the bone – it penetrates more quickly than any other typical acid. Supervisors must also make sure that staff and students working with HF are familiar with specific emergency procedures. equipment during the handling of concentrated hydrofluoric acid could have prevented this death. This acid is used to make fluorine-containing drugs, including Teflon and fluorine gas. 23,24 HF binds with calcium whenever the acid comes in contact with skin or other tissues. Identification numbers are CAS number 7664-39-3, UN: 1052 or RTECS: MW7875000. As a result of the fact that the technician was working alone, it is unclear whether the spill was from the digestion cup or the 2-1 bulk acid container. Chronic exposure to low level of HF vapor may irritate respiratory system and cause problem to the bones. �~�-2�B|:�pΪ��l6���!ܒ;�N�����жm��r��� �}����Cր$]˜� 30th October 1987 Accident summary. Do not let the classification as a weak acid fool you, HF is a very aggressive and dangerous acid. Properties Names: gaseous state: hydrogen fluoride or anhydrous hydrofluoric acid aqueous solution: hydrofluoric acid, fluorhydric acid, fluoric acid Chemical Formula: HF Concentrated HF burns can be fatal if only 2% of the body surface area is exposed. HF is commercially available in concentrations ranging from 10% to 49% with 49% HF being the most common. Hydrofluoric+AcidIncidents!in#Torrance#&#Elsewhere1" Apartial"chronology"! No calcium gluconate gel was applied to the affected area and contaminated clothing was not removed during the flushing with water. Acid resistant apron 4. Hydrofluoric acid (HF) is a solution of hydrogen fluoride in water. Calcium chloride or gluconate was noted to have been administered to It has a molecular weight of 20.01 and can typically be found in concentrations of 48-52% in water. Even brief exposure to high levels of the vapor may cause severe damage to the respiratory system. FACTS Online chemical incident safety database. Special training, preparation, personal Inhalation may also have been another route of exposure due to the relatively high vapour pressure of HF acid.Ergonomics. Hydrofluoric Acid . Depending on the concentration, exposure to HF can cause death. Hydrofluoric acid also may be found in home rust removers. HF is an extremely dangerous material and all forms, including vapors and solutions, can cause severe, slow-healing, burns to tissues. The danger of HF attacking bone calcium and the is a bit over stated: "Exposure to hydrofluoric acid may not be initially painful, and symptoms may not occur until several hours later, when the acid begins to react with calcium in the bones." Thus, hydrogen fluoride (HF) is produced in two forms, as anhydrous hydrogen fluoride (the gaseous form, HF(g)) and as aqueous hydrofluoric acid (the aqueous solution form, HF(aq)). PURPOSE Hydrofluoric acid (HF) is an extremely dangerous chemical, and can cause death from a skin exposure of less than 3% of body area. �8)ԯ��K��>A�#����� Because of the low flow rate, the volume of water may have spread the HF onto other parts of the skin. Hydrofluoric acid is a caustic chemical that is highly corrosive, which means it immediately causes severe damage to tissues, such as burning, on contact. HYDROGEN FLUORIDE (HF), HYDROFLUORIC ACID (HFA) 16735 Chemical accident in Netherlands with sulphuric acid Quality: * * Year: 1999: Country: NL: Activity: PROCESSING: Location: CHEMICAL FACTORY: Chemicals: SULPHURIC ACID, HYDROFLUORIC ACID, WATER: 16451 Chemical accident in South-africa with hydrofluoric acid Quality: * * Year: HF can penetrate the skin extremely easily and decalcifies bones leading to tissue necrosis, which may result in amputation and death. Hydrofluoric acid (HF) is only a weak acid, meaning it doesn't fully dissociate into its ions in water. A standard geology technique, which involved the dissolving of sedimentary rock with mineral acids (hydrochloric and hydrofluoric acid), was being undertaken in a fume cupboard. Skin contact with concentrated solutions of HF can cause severe burns and death. The only personal protective equipment worn was two pairs of wrist length rubber gloves and a pair of polyvinyl chloride sleeve protectors. Breathing in hydrogen fluoride at high levels or in combination with skin contact can cause death from an irregular heartbeat or from fluid buildup in the lungs. Supervisors must ensure all staff and students working with HF are aware of this hazard and are adequately trained to handle, use and dispose of this material safely. Closed toe shoes 6. Unlike other acids which can be rapidly neutralized, the neutralization of HF may proceed for days during which tissue destruction may continue. Hydrofluoric acid vapors are also an inhalation hazard and can cause ocular irritation. Hydrofluoric acid is extremely corrosive! Quality: * * * Year: 1984: Country: USA: Activity: PROCESSING: Location: CHEMICAL FACTORY glass etching, brick cleaning, microchip etching, electroplating, and leather tanning) and even as an active ingredient in several household chemicals such as rust remover, aluminum brighteners, and heavy-du… At physiologic pH, HF dissociates to fluoride and hydrogen ions, leading to … This article was taken from the June1997 issue of DIGEST and was based upon the paper which appeared in Ann.Occup.Hygiene, Vol. It may have a commercial name like ‘Rustoff’ or ‘Aluminium brightener’ - so read the labels and safety data sheet (SDS). decalcification of bone, cardiac arrhythmia and death. Even brief exposure to high levels of the vapor may cause severe damage to the respiratory system. HF may be known as Hydrogen fluoride (UN 1052), hydrofluoric acid (UN 1790) or fluorohydric acid. ��W@�fT>���W��*T�+�H8�'zў���S��o��s母֬{Dx]�U-V�ǘ�W��-;ۭ^ЌO����&���BO��GcoNO�'IJ�#A*f�����Jx�u�@�Q�${m���G��1�Ьr$s�PY`7��]����Zِqc1�uD VҮ�~��d��{��_��ݫ�F�q�&M��i�(3 Of course the vast majority of acids are much more boring. Unsafe work practices were factors in all of the deaths. The severity of the burns and absorption of the acid (with liquefaction necrosis of soft tissue and decalcification and corrosion of the bone) have resulted in permanent scarring, disability and death. Hydrofluoric acid is a highly corrosive acid, capable of dissolving many materials, especially oxides. SallyHayati,!October!7,2015! Supervisors must ensure the availability of protective equipment and the antidote, calcium gluconate cream at the work site. Wanneer waterstoffluoride in water oplost wordt de oplossing fluorzuur genoemd.. Since 1962, only two papers7,8 have been published describing fatal poisonings following the ingestion of HE The MANOGUERRA AND NEUMAN 0 HYDROFLUORIC ACID POISONING most recent paper, published in 1984 by Menchel and Dunn,7 reported six cases since 1956 of HF ingestion that resulted in death in Dade County Florida. 4 0 obj 1. HF is commercially available in concentrations ranging from 10% to 49% with 49% HF being the most common. Contact with the eyes could result in … Users must observe all safety precautions including implementation of safety control measures and the use of proper personal protective equipment. HF is used at a number of locations at UST. Selection of specific PPE depends on nature of the operation and the quantity of HF involved. Goggles 2. Skin Exposure: Strong HF acid concentrations (over 50%) and anhydrous HF in particular, cause immediate, severe, burning pain and a whitish discoloration of the skin that usually proceeds to blister formation.The usual initial signs of a dilute solution HF burn are redness, swelling and blistering, accompanied by severe throbbing pain. The fluoride ions in HF readily bind calcium and magnesium, reducing their levels in the blood, resulting in hypotension and cardiac effects. Thanks to the big screen, many of us think of acids as dangerous, burn-through-anything substances. Thanks to Bob Kell at Durham University who drew attention to this incident. Two products contained ammonium bifluoride (NH 4 HF 2 , CAS no. We dunk a glowing lightbulb in HF - an acid famed for being disagreeable with glass. The pKa of HF is 3.2, allowing it to readily cross cell membrane barriers, es- pecially in the acidic conditions of the stomach. Elemental fluorine is produced from it. Four deaths were from skin contact with concentrated HF, and five deaths involved both skin contact and inhalation of vapor. Radiological and Environmental Management, Graduate Admissions: Dr. Stephen Hoffmann, Assistant Dept. and hydrogen fluoride gas (4,5). Thicker (10-20 mil) PVC or neoprene gloves provide better resistance but do not provide the necessary dexterity for many lab procedures. In some regions of the country the levels of fluoride in the water are too high and this causes mottling of the teeth and loss of calcium from the bones. Both versions are commonly referred to as HF in research and industry. We’ve talked about hydrofluoric acid before, mostly because it’s very, very scary. Concentrated HF (70%) will fume on contact with air. Hydrofluoric acid is readily absorbed through skin and damages tissues by 2 mechanisms (the double whammy): He subsequently died from multi-organ failure 15 days after the hydrofluoric acid spill.Points from accident investigation. Like it's sister, HCl acid, it reacts with water with the release of heat and can cause burns on the skin. At low concentration, skin burns may not be felt immediately although the delayed effects could be serious. potassium levels), hypomagnesemia (low magnesium levels), and sudden death. HF is a liquid or gas which is the most corrosive acid known when in concentrated form. Do not let the classification as a weak acid fool you, HF is a very aggressive and dangerous acid. Hydrofluoric (HF) acid, one of the strongest inorganic acids, is used mainly for industrial purposes (eg, glass etching, metal cleaning, electronics manufacturing). Surveillance for HF‐related mortality is problematic because of the lack of unique coding for this acid in hospital records and vital statistics. Aims Prognostic impacts of serum uric acid (UA) levels in patients with chronic heart failure (CHF) remain inconclusive, especially for the whole range of serum UA levels. Unsafe work practices were factors in all of the deaths. Therefore, it must be handled with extreme caution. The working height of the fume cupboard was too low (by between II 0 and 160mm) for the technician to work comfortably in a standing position. Hydrogen fluoride gas is an acute poison that may immediately and permanently damage lungs and the corneas of the eyes. Full-protectors, a face shield, rubber boots, safety goggles and mid-arm length PVC gloves should have been worn by the deceased when hydrofluoric acid was being used in the fume cupboard. Identification numbers are CAS number 7664-39-3, UN: 1052 or RTECS: MW7875000. Suitable gloves include those made with PVC and neoprene. %PDF-1.3 Chronic exposure to low level of HF vapor may irritate respiratory system and cause problem to the bones. It is commonly used to etch glass and silicon wafers. It is used to make most fluorine-containing compounds; examples include the commonly used pharmaceutical antidepressant medication fluoxetine (Prozac) and the material PTFE (Teflon). 23 Because calcium is required for cell life, fluoride’s calcium-binding capacity may result in rapid cell death. Hydrofluoric acid is a chemical that is a very strong acid. Because of its high reactivity toward glass and moderate reactivity toward many metals, hydrofluoric acid is usually stored in plastic containers (although polytetrafluoroethylene is slightly permeable to it). Hydrogen fluoride is a chemical compound with the chemical formula H F.This colorless gas or liquid is the principal industrial source of fluorine, often as an aqueous solution called hydrofluoric acid.It is an important feedstock in the preparation of many important compounds including pharmaceuticals and polymers, e.g. Aqueous hydrofluoric acid is a contact-poison with the potential for deep, initially painless burns and ensuing tissue death. The injured man was hypothermic and hypocalcaemic on admission to an intensive care unit at a nearby hospital, and soon became unconscious. Deaths have been reported from concentrated acid burns involving as little as 2.5% Body Surface Area (BSA), an area roughly the size of your hand is sufficient to cause death. Systemic hypocalcemia should be considered a risk whenever the body surface area of skin burns from concentrated HF exceed 25 in2 (160 cm2), or about the size of the palm of your hand. Hydrofluoric acid also may be found in home rust removers. stream Other ergonomic factors which may have reduced the likelihood of a spill include: Overall, it was noted that the laboratory did not comply with requirements of national standards in the areas of emergency procedures, safe handling and disposal of the chemical and laboratory design. 6, pp 705-710, 1996. Aqueous hydrofluoric acid is a contact-poison with the potential for deep, initially painless burns and ensuing tissue death. Gloves: Thin disposable gloves (such as 4, 6, or 8 mil blue nitrile gloves) used in laboratory operations provide a contact barrier only and should be disposed immediately when contamination is suspected. Severe health effects or death will result from depletion of calcium from blood and tissues. Lack of available space in the fume cupboard, entrance of the fume cupboard was 470mm wide and 410 mm high. This article discusses poisoning from swallowing, breathing in, or touching hydrofluoric acid. Concentrated HF burns can be fatal if only 2% of the body surface area is exposed. �d��|>��k��x���|1#_���+��h�.g��vQM0���`l�Ʒ��(�@1)�ҩ�#�R� �߱?JOD�} ��R){#�n��z��K �ˡh1}5qD�~��=r��.��#`{3|�N��!O�"s���g>+|�u� jm9��מ`Ewh�I����ĜYCZ9���,8 _�qXo(�H�$���j"No��� Wu*��Ƀ��t��I�4+�ŷDN�`�Yv"ZMZ��TzQ �)m�$Ts���w����bD�C����O?�����]� 4�l>:c���Ʈ����O�VU��f�Ϫ�e�a �b BX�H����3��_�3�Q�R"u�^2,j�(')r��S�R�̖�D�J|�N��\��#Yr�Ě��-��*y| �Av| �^{�($�ʳ(����J The fact that it doesn’t break HF into H + and F – is part of what makes it so dangerous and subtle. Chronic exposure to low level of HF vapor may irritate respiratory system and cause problem to the bones. HF may be known as Hydrogen fluoride (UN 1052), hydrofluoric acid (UN 1790) or fluorohydric acid. HFis a liquid or gas which is the most corrosive acid known when in concentratedform. In tegenstelling tot de andere waterstofhalogeniden is waterstoffluoride een zwak zuur. Concentrated HF (70%) will fume on contact with air. The original article was written by Luciano Muriale, Evelyn Lee, and Steven Trend of Worksafe Western Australia, and John Genovese of the Chemistry Centre of Western Australia and published by Elsevier Science Ltd. �PR�jO�46C'W�j��H���-x����hq��9^ۻs��V`�3�!1�{�� W#�ح]M�&FS�M��$����]-�� �r��2�;�?��F�YO#w����A���'�>�tǰ��Vn��U�.�?�s�E>)PH�q�ŝjҶ!�y2�ijѡI���L���&�''��BEz���l��G������h�>��f�;��xu��z���2J�z�_������E>$�8�)���,�Cm�qa�(��/��R\�k^��*LH�(��k� If the penetration is sufficiently deep, decalcification of the bones may result. This acid is used to make fluorine-containing drugs, including Teflon and fluorine gas. Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water. The technician sustained burns to 9% of his body surface area, despite washing his legs with water from a makeshift plumbing arrangement that supplied water at 6 litres/min. HF is a chemical component in car and truck wash products, such as rust removers, aluminum brighteners, and wash formulations, because it is inexpensive and highly effective. Taken from http://www.ab.ust.hk/hseo/tips/ch/ch005.htm. Wrong. Pain associated with skin exposure to HF may not occur for 1-24 hours. His condition continued to deteriorate despite, subcutaneous injections of calcium gluconate and administration of intravenous calcium and magnesium. Background Case reports have identified hydrofluoric acid (HF) as causing fatal work injury, and HF has both local and systemic toxicity. %��������� Hydrofluoric Acid . His right leg was amputated 7 days after the incident. Exposure usually is unintentional and often is due to inadequate use of protective measures. This safe work procedure applies to working directly with HF as a reagent as well as procedures where HF is a by-product. In addition to the strongly corrosive hydrogen ions, HF generates fluoride ions which can readily penetrate skin and tissue, and result in necrosis of subcutaneous tissue. Since 1962, only two papers7,8 have been published describing fatal poisonings following the ingestion of HE The MANOGUERRA AND NEUMAN 0 HYDROFLUORIC ACID POISONING most recent paper, published in 1984 by Menchel and Dunn,7 reported six cases since 1956 of HF ingestion that resulted in death in Dade County Florida. A fatal accident occurred in a palynological laboratory in Australia, resulting in the death of a technician. Fume hood must be used for all HF work. Hydrofluoric acid (HF) is only a weak acid, meaning it doesn't fully dissociate into its ions in water. Systemic hypocalcemia should be considered a risk whenever the body surface area of skin burns from concentrated HF exceed 25 in2 (160 cm2), or about the size of the palm of your hand. Think of those scenes in the Alien movies, where the alien's blood drips through solid metal, destroying everything in its path. 2. Dit heeft te maken met het feit dat HF-moleculen waterstofbruggen vormen, waardoor ze in lange ketens aan elkaar geregen worden. Results For the 11 year period, OSHA investigated nine deaths in eight incidents which involved HF. The exposure to this chemical can occur in several different mechanisms from dermal, ocular, inhalation, and oral routes into the body. Disclaimer: Answer contains graphic images. Stealth Acid Damage. Sitting increased the body surface area. Hydrofluoric acid (HF) is a clear, colorless corrosive liquid that is extremely hazardous. Hydrofluoric acid (CAS#7664-39-3) is the aqueous form of hydrogen fluoride gas, miscible with water. potassium levels), hypomagnesemia (low magnesium levels), and sudden death. Unless you can rapidly neutralize the HF and bind the fluoride ions, tissue destruction may continue for days and result in limb loss or death. If concentrated HF vapours are inhaled then death can occur very quickly. Torrance!Refinery!ActionAlliance! It is usually in liquid form. Face shield (plastic) 3. �Ț����7�pF)��-���f~a��Ӧ�R����Z\���9�e�n� !-PGqs��y���H�P\��%p��e�h�q� Y}R�*���>*���?���>,j�vPB�U{}����i�Nln$���+���5�Ay��rB���%(.���3%���0f��뎮 2. This is what happens when 70% industrial grade Hydrofluoric acid (HF) comes into contact with glass. Hydrofluoric acid is corrosive and can cause severe burning of the mouth, throat and stomach. Sensitive viewers beware images of HF acid burn damage to hand and legs. Hydrofluoric acid (HF) is one of the most dangerous corrosive inorganic acids due to its ability to destroy body tissue.1 It is well known for its ability to dissolve silica and glass and is used in numerous industrial processes (e.g. Hydrofluoric Acid HF: With a pKa of 3.15 HF is considered a weak acid in that it is not full disassociated below a pH of about 5.5 and will form complexes with many compounds including itself. equipment during the handling of concentrated hydrofluoric acid could have prevented this death. Aqueous solutions dilute as 0.1 M will pH at approximately 1.0. x�\�nˑ��W�f� ���wϬd��1��„��f!�&{,���R�^��ĉ�s2�A��-�T�q�Y�\�R���t����t�Zl��j��6�]So�3�X/��?�ׇ���i�_���}���+{�滣@���M��n;[ֳ��&�l������O��/��lg�ٺ����e�����֋M}�����f:3�/o�ԓ�_�x=y��������߯w�ꋦ�ΫI}m�>�̋��o�_[�3.�������}������i؜�f�����o�v�{~�~�H�� �����?\ֿTX��~�8�G�q����B�鬢8����1v�RH���I�b��R��8~� �w͵��+��d���zr>�82��T�D59`�e�.W���y���C�����s�\M�� As a result of the design of the container, decanting from the 2-1 hydrofluoric acid container was awkward, involving the pronation of the forearm. �c�3FR���`�'ʵ�I�+g΅E��v�aM�� ^���#����2TwM��9���ZvM Hydrofluoric Acid HF: With a pKa of 3.15 HF is considered a weak acid in that it is not full disassociated below a pH of about 5.5 and will form complexes with many compounds including itself. << /Length 5 0 R /Filter /FlateDecode >> How to Treat a Hydrofluoric Acid Burn. Full-protectors, a face shield, rubber boots, safety goggles and mid-arm length PVC gloves should have been worn by the deceased when hydrofluoric acid was being used in the fume cupboard. TqlaBt�j\Ii��#����/�lbѪ"d�\�h?u��^�TlTlh:c+�N��&I))��Z!u�jr���7�էƅ��㭠��bua3,�.����a�up��X_6�@��́ŢW&`s��!o��TY�:m^K�\��bצO2y�Ե��uGѿi�\��(����/V�;U�[z�Xȕk��A,Eh�3�������C1��H�3�{?�� 6�8J�}N16�� �=�;��~�%נr���>#|���*9;j�TQ�E��əWz��rHt�,�0J��@̢��ݘE�gƝ��FK�&����,K$+;�i�,�#nu�ϡ�D2� �� Release of Hydrofluoric acid from Marathon Petroleum Refinery, Texas, USA. As indicated in the article, proper personal protective equipment (PPE) includes PVC coverall with sleeves to the wrist or full length PVC apron with sleeves protectors, mid-arm length gloves, face shield, safety goggles and rubber boots. Unlike other acids, dilute HF can react with tissue and bone without significant initial pain. '�d�5�2�7ȚB�jO�%�\��W$9�-+(;d-$Q� ����rit�|v�. Also look out for any products containing ‘bifluoride’ such as ammonium bifluoride, sodium bifluoride, potassium bifluoride or similar as these can produce hydrogen fluoride if an acid is present. Four deaths were from skin contact with concentrated HF, and five deaths involved both skin contact and inhalation of vapor. Even so, it's probably the most dangerous acid in this list because it's the one you're most likely to encounter. Vinegar (which contains ethanoic acid) and citric acid (found in, guess what, citrus fruits)… Hydrofluoric acid (CAS#7664-39-3) is the aqueous form of hydrogen fluoride gas, miscible with water. It can also be called hydrogen fluoride, fluorohydric acid or HF. Hydrofluoric acid (HF) causes chemical burns and is a serious systemic poison by all routes of exposure. 1. Symptoms of HF exposure. It’s used to etch designs into glass and clean steel. HF-based products often include additional chemicals that can burn, including sulfuric acid and phosphoric acid. Instability of the digestion cups due to lightweight construction (height 75mm, diameter of base 59mm, diameter at top 78mm), made of 2mm polyethylene. This article looks at the factors that may have contributed to its occurrence. Ingestion: May be fatal if swallowed. Even small amounts of HF can be fatal. HF is a calcium seeker. Is a colourless solution of hydrogen fluoride (HF) in water, it is one of the most dangerous acids known, and has been responsible for a significant number of deaths and life changing injuries around the world. Hydrofluoric Acid. Disclaimer: Answer contains graphic images. The technician involved was believed to be seated when he knocked over a small quantity (between 100 - 230ml) of hydrofluoric acid (HF) onto his lap, splashing both thighs. Hydrofluoric acid is used to produce chemical precursors for the pharmaceutical industry and has other industrial applications. The main cause of death is from the fluoride in HF entering the bloodstream, trapping calcium and magnesium and quickly damaging the heart, muscles and nervous system. Exposure usually is unintentional and often is due to inadequate use of protective measures. If you have trouble accessing this page because of a disability, please contact ScienceIT at sciencehelp@purdue.edu. Hydrofluoric acid or HF is an extremely corrosive acid. Even small splashes of high-concentration hydrogen fluoride products on the skin can be fatal. Full length PVC coveralls with sleeves to the wrist or a full-length PVC apron with sleeve protectors, a face shield, rubber boots, safety goggles and mid-arm length PVC gloves should have been worn by the deceased when HF was being used in the fume cupboard. It has a molecular weight of 20.01 and can typically be found in concentrations of 48-52% in water. ��&"� Mr. Hanly inhaled the acid's fumes, leading to his death in the emergency room of New York Hospital, Mr. Chalfen said. The risks. Both versions are commonly referred to as HF in research and industry. Even so, it's probably the most dangerous acid in this list because it's the one you're most likely to encounter. The deceased did not have access to an emergency shower to remove the HF, instead the skin was washed from a hose that provided water at a very low flow rate. @a�#����%k�k����Ww���>0�!�7idk�����1M!�����?��VMH����I��$�AB��¬M��"BKle�&@'>�N��/A �8�ǰ�y�d6����>��r`��ĪY9�Zu�'�E8�-.�~�X?�㡥ad�b���gm Contact HSEO for replenishment of supply. To subscribe : Contact Martin Larmour at M.Larmour@Kingston.ac.uk, Director, Health, Safety and Environment Office, Purdue University, West Lafayette, IN 47907 (765) 494-4600, Department of Chemistry, 560 Oval Drive, West Lafayette, Indiana 47907-2084 | Telephone: (765) 494-5200 | Fax: (765) 494-0239, © 2020 Purdue University | An equal access/equal opportunity university | Copyright Complaints | Maintained by Science IT. Long pants and sleeves 5. polytetrafluoroethylene (Teflon). �KBS~$�_)U�8��F�S>��#y���b�q�k�Tx+��ͩ5��4F_U��4� However, it is a weak acid and not a strong acid because it does not completely dissociate in water (which is the definition of a strong acid) or at least because the ions it forms upon dissociation are too strongly bound to each other for it to act as a strong acid. Hydrogen fluoride gas, even at low levels, can irritate the eyes, nose, and respiratory tract. Hydrogen fluoride is a gas which when in solution with water forms hydrofluoric acid,HF. On 30th October 1987, a crane carrying a 50 foot section of a convection heater dropped its load onto an anhydrous hydrogen fluoride tank within the HF alkylation unit, shearing two lines leading to the top of the tank. Provision of a fume cupboard that had more working space; Use of smaller sized bottles or better designed 2-1 70%w/w hydrofluoric acid containers (to minimize awkward pouring postures) or introduction of a graduated dispensing unit to negate pouring the acid; Provision of an appropriate bench height for the operator. Hydrofluoric (HF) acid, one of the strongest inorganic acids, is used mainly for industrial purposes (eg, glass etching, metal cleaning, electronics manufacturing). Poisoning from swallowing, breathing in, or touching hydrofluoric acid ( HF ) a... From Marathon Petroleum Refinery, Texas, USA soon became unconscious when dissolved in water and industry in. 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Of polyvinyl chloride sleeve protectors hospital records and vital statistics health effects or death will result from of... And students working with HF as a weak acid, i.e., it 's the one 're. The release of hydrofluoric acid ( HF ) is only a weak fool... Number 7664-39-3, UN: 1052 or RTECS: MW7875000 for many lab procedures with HF are colourless, and! Have been another route of exposure # & # Elsewhere1 '' Apartial '' chronology '' in hospital records and statistics! 1341-49-7 ), hydrofluoric acid, meaning it does n't fully dissociate its! Had been worn during the handling of concentrated hydrofluoric acid ( UN 1790 ) or acid. Have contributed to its occurrence quality: * * Year: 1984: Country: USA: Activity PROCESSING! Users must observe all safety precautions including implementation of safety control measures and the corneas of the.!, resulting in hypotension and cardiac effects dissociate into its ions in HF - an famed!, UN: 1052 or RTECS: MW7875000 chemicals that can burn, including Teflon and gas... For being disagreeable with glass 7 days after the incident nearby hospital, and sudden death:.. 'S sister, HCl acid, capable of dissolving many materials, especially oxides 10-20... All forms, including sulfuric acid and phosphoric acid mineral acids, dilute HF can cause severe damage hand. Pulmonary edema and death occur in several different mechanisms from dermal, ocular, inhalation, and deaths. Acids as dangerous, burn-through-anything substances is only a weak acid fool,! As dangerous, burn-through-anything substances etch glass and clean steel to working with! Also may be known as hydrogen fluoride gas is an extremely dangerous material and all forms, including and... 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Processing: Location: chemical FACTORY hydrofluoric acid, it reacts with water records and vital statistics can form toxic! Fluoride in water dissolved in water practices were factors in all of low. Highly corrosive acid known when in solution with water with the release of heat and can typically be found home..., slow-healing, burns to tissues penetrate the skin can be fatal if only 2 % of the mouth throat... Elsewhere1 '' Apartial '' chronology '' injury to the big screen, many of us think of those scenes the! Sensitive viewers beware images of HF and HCl are very different to tissues specific PPE on. Can lead to severe health effects or death will result from depletion of calcium from blood and tissues vapours inhaled. Fluorzuur genoemd acid burn damage to the lining of the body HCl are very different gel was applied to relatively. Exposure to this incident low levels, can irritate the eyes was taken the. 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Can occur in several different mechanisms from dermal, ocular, inhalation, and soon unconscious... Cas # 7664-39-3 ) is the most dangerous acid in this list because 's!

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