This safe work procedure applies to working directly with HF as a reagent as well as procedures where HF is a by-product. 1. 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: Aqueous solutions dilute as 0.1 M will pH at approximately 1.0. �c�3FR���`�'ʵ�I�+g΅E��v�aM�� ^���#����2TwM��9���ZvM HF is commercially available in concentrations ranging from 10% to 49% with 49% HF being the most common. polytetrafluoroethylene (Teflon). Stealth Acid Damage. 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. Even brief exposure to high levels of the vapor may cause severe damage to the respiratory system. 1. Long pants and sleeves 5. %��������� 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. Aqueous hydrofluoric acid is a contact-poison with the potential for deep, initially painless burns and ensuing tissue death. 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. It may have a commercial name like ‘Rustoff’ or ‘Aluminium brightener’ - so read the labels and safety data sheet (SDS). Unlike other mineral acids, hydrofluoric acid will attack glass, concrete, rubber, quartz and alloys containing silica. Four deaths were from skin contact with concentrated HF, and five deaths involved both skin contact and inhalation of vapor. 1341-49-7), a chemical that dissociates into HF when dissolved in water and therefore has similar toxicity. decalcification of bone, cardiac arrhythmia and death. << /Length 5 0 R /Filter /FlateDecode >> No calcium gluconate gel was applied following dermal exposure. HFis a liquid or gas which is the most corrosive acid known when in concentratedform. Even so, it's probably the most dangerous acid in this list because it's the one you're most likely to encounter. Severe health effects or death will result from depletion of calcium from blood and tissues. Concentrated HF (70%) will fume on contact with air. This acid is used to make fluorine-containing drugs, including Teflon and fluorine gas. 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. '�d�5�2�7ȚB�jO�%�\��W$9�-+(;d-$Q� ����rit�|v�. Wrong. It can also be called hydrogen fluoride, fluorohydric acid or HF. 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. Hydrofluoric acid (HF) is a solution of hydrogen fluoride in water. Hydrofluoric Acid . The DIGEST is a newsletter published by the Universities Safety Association. Contact with the eyes could result in blindness. Radiological and Environmental Management, Graduate Admissions: Dr. Stephen Hoffmann, Assistant Dept. Disclaimer: Answer contains graphic images. Closed toe shoes 6. Hydrogen fluoride is a gas which when in solution with water forms hydrofluoric acid,HF. Hydrofluoric Acid (HF) Hydrofluoric Acid (HF) is a highly corrosive inorganic acid. 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. The fact that it doesn’t break HF into H + and F – is part of what makes it so dangerous and subtle. It’s used to etch designs into glass and clean steel. �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 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. Results For the 11 year period, OSHA investigated nine deaths in eight incidents which involved HF. Dit heeft te maken met het feit dat HF-moleculen waterstofbruggen vormen, waardoor ze in lange ketens aan elkaar geregen worden. Elemental fluorine is produced from it. Hydrofluoric acid (HF) causes chemical burns and is a serious systemic poison by all routes of exposure. 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)). No calcium gluconate gel was applied to the affected area and contaminated clothing was not removed during the flushing with water. It is commonly used to etch glass and silicon wafers. Four deaths were from skin contact with concentrated HF, and five deaths involved both skin contact and inhalation of vapor. Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water. It has a molecular weight of 20.01 and can typically be found in concentrations of 48-52% in water. ��&"� Disclaimer: Answer contains graphic images. Chronic exposure to low level of HF vapor may irritate respiratory system and cause problem to the bones. Supervisors must ensure the availability of protective equipment and the antidote, calcium gluconate cream at the work site. If concentrated HF vapours are inhaled then death can occur very quickly. stream 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. %PDF-1.3 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. Wanneer waterstoffluoride in water oplost wordt de oplossing fluorzuur genoemd.. Hydrogen fluoride gas is an acute poison that may immediately and permanently damage lungs and the corneas of the eyes. Waterstoffluoride, fluorwaterstofzuur of vloeizuur is een zeer corrosief zuur met als brutoformule HF. Hydrofluoric acid is a highly corrosive acid, capable of dissolving many materials, especially oxides. Chronic exposure to low level of HF vapor may irritate respiratory system and cause problem to the bones. Goggles 2. 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. His right leg was amputated 7 days after the incident. 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. Release of Hydrofluoric acid from Marathon Petroleum Refinery, Texas, USA. 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. Suitable gloves include those made with PVC and neoprene. 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. 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. Therefore, it must be handled with extreme caution. If the penetration is sufficiently deep, decalcification of the bones may result. The risks. Hydrofluoric acid (HF) burns are serious, and it's important to seek medical attention immediately after a burn even if you don't feel symptoms. There were reported to be 47 deaths. 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. His condition continued to deteriorate despite, subcutaneous injections of calcium gluconate and administration of intravenous calcium and magnesium. Like it's sister, HCl acid, it reacts with water with the release of heat and can cause burns on the skin. We dunk a glowing lightbulb in HF - an acid famed for being disagreeable with glass. Thicker (10-20 mil) PVC or neoprene gloves provide better resistance but do not provide the necessary dexterity for many lab procedures. Solutions of HF are colourless, acidic and highly corrosive. 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. FACTS Online chemical incident safety database. 23 Because calcium is required for cell life, fluoride’s calcium-binding capacity may result in rapid cell death. ��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$s�PY`7��]����Zِqc1�uD VҮ�~��d��{��_��ݫ�F�q�&M��i�(3 Both versions are commonly referred to as HF in research and industry. potassium levels), hypomagnesemia (low magnesium levels), and sudden death. Hydrogen fluoride is a chemical compound with the chemical formula H F.This colorless gas or liquid is the principal industrial source of fluorine, often as an aqueous solution called hydrofluoric acid.It is an important feedstock in the preparation of many important compounds including pharmaceuticals and polymers, e.g. Hydrofluoric acid also may be found in home rust removers. TqlaBt�j\Ii��#����/�lbѪ"d�\�h?u��^�TlTlh:c+�N��&I))��Z!u�jr���7�էƅ��㭠��bua3,�.����a�up��X_6�@��́ŢW&`s��!o��TY�:m^K�\��bצO2y�Ե��uGѿi�\��(����/V�;U�[z�Xȕk��A,Eh�3�������C1��H�3�{?�� 6�8J�}N16�� �=�;��~�%נr���>#|���*9;j�TQ�E��əWz��rHt�,�0J��@̢��ݘE�gƝ��FK�&����,K$+;�i�,�#nu�ϡ�D2� �� Of course the vast majority of acids are much more boring. �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| �^{�($�ʳ(����J Unsafe work practices were factors in all of the deaths. Because of the low flow rate, the volume of water may have spread the HF onto other parts of the skin. ?��Gդ�#8���f��87r$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�� �`?�" Concentrated HF burns can be fatal if only 2% of the body surface area is exposed. equipment during the handling of concentrated hydrofluoric acid could have prevented this death. Calcium chloride or gluconate was noted to have been administered to 6, pp 705-710, 1996. 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. Hydrofluoric acid also may be found in home rust removers. HF can penetrate the skin extremely easily and decalcifies bones leading to tissue necrosis, which may result in amputation and death. At low concentration, skin burns may not be felt immediately although the delayed effects could be serious. It is usually in liquid form. Two products contained ammonium bifluoride (NH 4 HF 2 , CAS no. and hydrogen fluoride gas (4,5). 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. Safety shower and emergency eyewash must be available in or near the lab. 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. Do not let the classification as a weak acid fool you, HF is a very aggressive and dangerous acid. 2. �8)ԯ��K��>A�#����� Aqueous hydrofluoric acid is a contact-poison with the potential for deep, initially painless burns and ensuing tissue death. 4 0 obj 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. Surveillance for HF‐related mortality is problematic because of the lack of unique coding for this acid in hospital records and vital statistics. Inhalation of HF produces an immediate injury to the lining of the lungs with hemorrhage pulmonary edema and death. He subsequently died from multi-organ failure 15 days after the hydrofluoric acid spill.Points from accident investigation. Mr. Hanly inhaled the acid's fumes, leading to his death in the emergency room of New York Hospital, Mr. Chalfen said. HF may be known as Hydrogen fluoride (UN 1052), hydrofluoric acid (UN 1790) or fluorohydric acid. Hydrofluoric Acid . Hydrofluoric acid (HF) is a clear, colorless corrosive liquid that is extremely hazardous. Contact with the eyes could result in … This article discusses poisoning from swallowing, breathing in, or touching hydrofluoric acid. 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. �3���[����we�YB����yF�&�e;Y�|�Bos Chronic exposure to low level of HF vapor may irritate respiratory system and cause problem to the bones. 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