\{��5��n���V�D��u=曑*�Sx��ا�nn�%��,̀�ET|I��)��ge�H�Ø@�R0� ��!9�nZ(MЪb����&*��s��(x`��������`����Q���2+�� Xs(8�q��_T�G�X�) Hydrogen fluoride gas, even at low levels, can irritate the eyes, nose, and respiratory tract. Even brief exposure to high levels of the vapor may cause severe damage to the respiratory system. It is commonly used to etch glass and silicon wafers. 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. 30th October 1987 Accident summary. 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. If you have trouble accessing this page because of a disability, please contact ScienceIT at sciencehelp@purdue.edu. Severe health effects or death will result from depletion of calcium from blood and tissues. 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. 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. Inhalation may also have been another route of exposure due to the relatively high vapour pressure of HF acid.Ergonomics. 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. Hydrofluoric+AcidIncidents!in#Torrance#&#Elsewhere1" Apartial"chronology"! HF is a liquid or gas which is the most corrosive acid known when in concentrated form. Exposure usually is unintentional and often is due to inadequate use of protective measures. Sitting increased the body surface area. Closed toe shoes 6. �~�-2�B|:�pΪ��l6���!ܒ;�N�����жm��r��� �}����Cր$]˜� Instability of the digestion cups due to lightweight construction (height 75mm, diameter of base 59mm, diameter at top 78mm), made of 2mm polyethylene. Both versions are commonly referred to as HF in research and industry. Aqueous hydrofluoric acid is a contact-poison with the potential for deep, initially painless burns and ensuing tissue death. Aqueous hydrofluoric acid is a contact-poison with the potential for deep, initially painless burns and ensuing tissue death. Hydrofluoric acid is used to produce chemical precursors for the pharmaceutical industry and has other industrial applications. Pain associated with skin exposure to HF may not occur for 1-24 hours. Of course the vast majority of acids are much more boring. Sensitive viewers beware images of HF acid burn damage to hand and legs. Hydrofluoric acid causes painful tissue inflammation and necrosis on contact. Elemental fluorine is produced from it. Lack of available space in the fume cupboard, entrance of the fume cupboard was 470mm wide and 410 mm high. DO NOT confuse hydrofluoric acid with hydrochloric acid (HCl). Hydrofluoric Acid (HF) Hydrofluoric Acid (HF) is a highly corrosive inorganic acid. Vinegar (which contains ethanoic acid) and citric acid (found in, guess what, citrus fruits)… Unlike other acids, dilute HF can react with tissue and bone without significant initial pain. Results For the 11 year period, OSHA investigated nine deaths in eight incidents which involved HF. polytetrafluoroethylene (Teflon). In tegenstelling tot de andere waterstofhalogeniden is waterstoffluoride een zwak zuur. HF is commercially available in concentrations ranging from 10% to 49% with 49% HF being the most common. �c�3FR���`�'ʵ�I�+g΅E��v�aM�� ^���#����2TwM��9���ZvM Hydrofluoric (HF) acid, one of the strongest inorganic acids, is used mainly for industrial purposes (eg, glass etching, metal cleaning, electronics manufacturing). It may have a commercial name like ‘Rustoff’ or ‘Aluminium brightener’ - so read the labels and safety data sheet (SDS). 1. Think of those scenes in the Alien movies, where the alien's blood drips through solid metal, destroying everything in its path. Aqueous solutions dilute as 0.1 M will pH at approximately 1.0. Ingestion: May be fatal if swallowed. 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. 40, No. 6, pp 705-710, 1996. 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� �� If HF is not rapidly neutralized and the fluoride ion bound, tissue destruction may continue for days and result in limb loss or death. potassium levels), hypomagnesemia (low magnesium levels), and sudden death. Even so, it's probably the most dangerous acid in this list because it's the one you're most likely to encounter. 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. Even small splashes of high-concentration hydrogen fluoride products on the skin can be fatal. 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. HF is an extremely dangerous material and all forms, including vapors and solutions, can cause severe, slow-healing, burns to tissues. Special training, preparation, personal �3���[����we�YB����yF�&�e;Y�|�Bos Two products contained ammonium bifluoride (NH 4 HF 2 , CAS no. decalcification of bone, cardiac arrhythmia and death. Chronic exposure to low level of HF vapor may irritate respiratory system and cause problem to the bones. info@safetorrancerefinery.org! This safe work procedure applies to working directly with HF as a reagent as well as procedures where HF is a by-product. ��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 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. 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. 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�� Wrong. 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. Thanks to the big screen, many of us think of acids as dangerous, burn-through-anything substances. Properties Names: gaseous state: hydrogen fluoride or anhydrous hydrofluoric acid aqueous solution: hydrofluoric acid, fluorhydric acid, fluoric acid Chemical Formula: HF This article looks at the factors that may have contributed to its occurrence. Hydrofluoric acid (HF) causes chemical burns and is a serious systemic poison by all routes of exposure. Even small amounts of HF can be fatal. Because of the low flow rate, the volume of water may have spread the HF onto other parts of the skin. << /Length 5 0 R /Filter /FlateDecode >> Long pants and sleeves 5. HF may be known as Hydrogen fluoride (UN 1052), hydrofluoric acid (UN 1790) or fluorohydric acid. Hydrofluoric acid (CAS#7664-39-3) is the aqueous form of hydrogen fluoride gas, miscible with water. If the penetration is sufficiently deep, decalcification of the bones may result. 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. 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. 2. 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). The exposure to this chemical can occur in several different mechanisms from dermal, ocular, inhalation, and oral routes into the body. Depending on the concentration, exposure to HF can cause death. Hydrofluoric acid is a chemical that is a very strong acid. Hydrofluoric acid is a highly corrosive acid, capable of dissolving many materials, especially oxides. 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�| 2. This is what happens when 70% industrial grade Hydrofluoric acid (HF) comes into contact with glass. Severe health effects or death will result from depletion of calcium from blood and tissues. Hydrofluoric acid is readily absorbed through skin and damages tissues by 2 mechanisms (the double whammy): The fluoride ions in HF readily bind calcium and magnesium, reducing their levels in the blood, resulting in hypotension and cardiac effects. Concentrated HF (70%) will fume on contact with air. '�d�5�2�7ȚB�jO�%�\��W$9�-+(;d-$Q� ����rit�|v�. Hydrofluoric acid also may be found in home rust removers. Goggles 2. This acid is used to make fluorine-containing drugs, including Teflon and fluorine gas. Hydrogen fluoride is a gas which when in solution with water forms hydrofluoric acid,HF. An ergonomic assessment of the work station indicated the following: The laboratory personnel could have minimised the likelihood of a spill through the introduction of cup supports for the digestion cups. stream The DIGEST is a newsletter published by the Universities Safety Association. The toxicity of HF and HCl are very different. Hydrofluoric Acid. Hydrofluoric acid (HF) can form a toxic cloud at room temperature while exposure can lead to severe health problems and even death. At physiologic pH, HF dissociates to fluoride and hydrogen ions, leading to … 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. potassium levels), hypomagnesemia (low magnesium levels), and sudden death. Unlike other acids which can be rapidly neutralized, the neutralization of HF may proceed for days during which tissue destruction may continue. It is usually in liquid form. ��&"� 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. Concentrated HF burns can be fatal if only 2% of the body surface area is exposed. Four deaths were from skin contact with concentrated HF, and five deaths involved both skin contact and inhalation of vapor. Contact with the eyes could result in blindness. If concentrated HF vapours are inhaled then death can occur very quickly. 65�LZS�����q ����=GÖD����G�\]"�lB+�c�|F�c��@ death will result from depletion of calcium from blood and tissues. %PDF-1.3 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. 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. Radiological and Environmental Management, Graduate Admissions: Dr. Stephen Hoffmann, Assistant Dept. Quality: * * * Year: 1984: Country: USA: Activity: PROCESSING: Location: CHEMICAL FACTORY 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. At low concentration, skin burns may not be felt immediately although the delayed effects could be serious. It has a molecular weight of 20.01 and can typically be found in concentrations of 48-52% in water. 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. Hydrofluoric acid (HF) is only a weak acid, meaning it doesn't fully dissociate into its ions in water. FACTS Online chemical incident safety database. �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| �^{�($�ʳ(����J Hydrogen fluoride gas is an acute poison that may immediately and permanently damage lungs and the corneas of the eyes. Both versions are commonly referred to as HF in research and industry. His right leg was amputated 7 days after the incident. Hydrofluoric Acid HF: With a pKa of 3.15 HF is considered a weak acid in that it is not full disassociated below a pH of about 5.5 and will form complexes with many compounds including itself. 1 Deaths have been reported from concentrated acid burns (involving ≥ 50% HF solutions) to as little as 2.5% of body surface area, which is equivalent to approximately one hand and forearm. Identification numbers are CAS number 7664-39-3, UN: 1052 or RTECS: MW7875000. Like it's sister, HCl acid, it reacts with water with the release of heat and can cause burns on the skin. Stealth Acid Damage. Waterstoffluoride, fluorwaterstofzuur of vloeizuur is een zeer corrosief zuur met als brutoformule HF. �PR�jO�46C'W�j��H���-x����hq��9^ۻs��V`�3�!1�{�� W#�ح]M�&FS�M��$����]-�� �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� Dit heeft te maken met het feit dat HF-moleculen waterstofbruggen vormen, waardoor ze in lange ketens aan elkaar geregen worden. Skin contact with concentrated solutions of HF can cause severe burns and death.