Do not let the classification as a weak acid fool you, HF is a very aggressive and dangerous acid. 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)). �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 Severe health effects or death will result from depletion of calcium from blood and tissues. The only personal protective equipment worn was two pairs of wrist length rubber gloves and a pair of polyvinyl chloride sleeve protectors. Identification numbers are CAS number 7664-39-3, UN: 1052 or RTECS: MW7875000. �]}r �ܸ'�H�#,��"�ن �~s. Properties Names: gaseous state: hydrogen fluoride or anhydrous hydrofluoric acid aqueous solution: hydrofluoric acid, fluorhydric acid, fluoric acid Chemical Formula: HF 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. Face shield (plastic) 3. 1. Sensitive viewers beware images of HF acid burn damage to hand and legs. DO NOT confuse hydrofluoric acid with hydrochloric acid (HCl). 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. 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). Hydrogen fluoride gas is an acute poison that may immediately and permanently damage lungs and the corneas of the eyes. Hydrofluoric acid vapors are also an inhalation hazard and can cause ocular irritation. HF is commercially available in concentrations ranging from 10% to 49% with 49% HF being the most common. 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. Sitting increased the body surface area. In tegenstelling tot de andere waterstofhalogeniden is waterstoffluoride een zwak zuur. Even so, it's probably the most dangerous acid in this list because it's the one you're most likely to encounter. This article was taken from the June1997 issue of DIGEST and was based upon the paper which appeared in Ann.Occup.Hygiene, Vol. HF may be known as Hydrogen fluoride (UN 1052), hydrofluoric acid (UN 1790) or fluorohydric acid. Hydrofluoric acid is a highly corrosive acid, capable of dissolving many materials, especially oxides. Four deaths were from skin contact with concentrated HF, and five deaths involved both skin contact and inhalation of vapor. 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. This acid is used to make fluorine-containing drugs, including Teflon and fluorine gas. Torrance!Refinery!ActionAlliance! Hydrofluoric Acid . 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�� Lack of available space in the fume cupboard, entrance of the fume cupboard was 470mm wide and 410 mm high. Hydrofluoric acid (CAS#7664-39-3) is the aqueous form of hydrogen fluoride gas, miscible with water. << /Length 5 0 R /Filter /FlateDecode >> 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. Quality: * * * Year: 1984: Country: USA: Activity: PROCESSING: Location: CHEMICAL FACTORY Both versions are commonly referred to as HF in research and industry. 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. This is what happens when 70% industrial grade Hydrofluoric acid (HF) comes into contact with glass. 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. Radiological and Environmental Management, Graduate Admissions: Dr. Stephen Hoffmann, Assistant Dept. Aqueous hydrofluoric acid is a contact-poison with the potential for deep, initially painless burns and ensuing tissue death. Inhalation may also have been another route of exposure due to the relatively high vapour pressure of HF acid.Ergonomics. Dit heeft te maken met het feit dat HF-moleculen waterstofbruggen vormen, waardoor ze in lange ketens aan elkaar geregen worden. Because of the low flow rate, the volume of water may have spread the HF onto other parts of the skin. Hydrofluoric acid is corrosive and can cause severe burning of the mouth, throat and stomach. Ingestion: May be fatal if swallowed. Hydrogen fluoride is a gas which when in solution with water forms hydrofluoric acid,HF. 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. The pKa of HF is 3.2, allowing it to readily cross cell membrane barriers, es- pecially in the acidic conditions of the stomach. 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 causes painful tissue inflammation and necrosis on contact. Hydrofluoric acid or HF is an extremely corrosive acid. Hydrofluoric Acid. Disclaimer: Answer contains graphic images. 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. �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� 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. 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. Of course the vast majority of acids are much more boring. Mr. Hanly inhaled the acid's fumes, leading to his death in the emergency room of New York Hospital, Mr. Chalfen said. If concentrated HF vapours are inhaled then death can occur very quickly. polytetrafluoroethylene (Teflon). 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. Waterstoffluoride, fluorwaterstofzuur of vloeizuur is een zeer corrosief zuur met als brutoformule HF. Hydrofluoric+AcidIncidents!in#Torrance#&#Elsewhere1" Apartial"chronology"! If HF is not rapidly neutralized and the fluoride ion bound, tissue destruction may continue for days and result in limb loss or death. 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. HF can penetrate the skin extremely easily and decalcifies bones leading to tissue necrosis, which may result in amputation and 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. \{��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�) 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. polytetrafluoroethylene (Teflon). potassium levels), hypomagnesemia (low magnesium levels), and sudden death. HF is commercially available in concentrations ranging from 10% to 49% with 49% HF being the most common. Concentrated HF (70%) will fume on contact with air. If the penetration is sufficiently deep, decalcification of the bones may result. Think of those scenes in the Alien movies, where the alien's blood drips through solid metal, destroying everything in its path. 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. �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 Hydrofluoric acid also may be found in home rust removers. 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. FACTS Online chemical incident safety database. Hydrofluoric acid (HF) causes chemical burns and is a serious systemic poison by all routes of exposure. Thicker (10-20 mil) PVC or neoprene gloves provide better resistance but do not provide the necessary dexterity for many lab procedures. It can also be called hydrogen fluoride, fluorohydric acid or HF. 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. Special training, preparation, personal @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 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… Elemental fluorine is produced from it. 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. Contact with the eyes could result in blindness. It is usually in liquid form. Chronic exposure to low level of HF vapor may irritate respiratory system and cause problem to the bones. 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. 6, pp 705-710, 1996. Disclaimer: Answer contains graphic images. Like it's sister, HCl acid, it reacts with water with the release of heat and can cause burns on the skin. The exposure to this chemical can occur in several different mechanisms from dermal, ocular, inhalation, and oral routes into the body. HF-based products often include additional chemicals that can burn, including sulfuric acid and phosphoric acid. This article discusses poisoning from swallowing, breathing in, or touching hydrofluoric acid. 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