Hydrofluoricacid

Hydrofluoric acid, a solution of hydrogen fluoride gas (HF) in water, is one of the most corrosive and dangerous chemicals encountered in the laboratory. Exposure to HF can cause severe tissue damage and even death. The fluoride ions in HF readily bind calcium and magnesium, reducing their levels in the blood, resulting in hypotension and cardiac effects.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.2 In lower concentrations, symptoms may be delayed, which can lead to delayed recognition of exposure and a more severe burn. The following special safety precautions are necessary when using this chemical, regardless if using dilute or concentrated HF.

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Conducted energy weapons (CEW) are widely used by law enforcement to gain control of subjects in potentially violent situations. However, the use of CEWs is not without risk. The 2007 tragedy involving Robert Dziekanski precipitated a comprehensive examination of the use of CEWs. As a result of that review, the Saskatchewan Police Commission has implemented new standards for the use of CEWs and operator certification.

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Immediately call EH&S at (650) 725-9999 (286 from School of Medicine phones) to report an HF spill that is health threatening, is outside of the fume hood, is greater than 30 mls, or will take longer than 15 minutes to clean up. Do not use spill kits with kitty litter or sand because HF reacts with silica to produce silicon tetrafluoride, a toxic gas.

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Or, take victim to seek medical evaluation at Stanford Hospital Emergency Room. If possible, provide continuous irrigation during transport.

This course has been specifically developed for municipal officers in Saskatchewan and is consistent with the Policy Manual for Saskatchewan Municipal Police Services as authorized by the Saskatchewan Police Commission.

Conducted Energy Weapon – Taser 7 (Saskatchewan) is designed to ensure police officers can safely use a CEW and can articulate the legal, technical, medical, and accountability requirements for use of a CEW. The content of this course is consistent with the Policy Manual for Saskatchewan Municipal Police Services – Standards and is mandatory for all municipal police officers who operate CEWs in Saskatchewan.

Hydrofluoric acid (HF) exposure is very toxic and can be fatal if not treated immediately. HF is absorbed quickly; however, damage/symptoms can occur hours to days later. Any person exposed to HF must have immediate first aid, followed by immediate medical treatment from a physician. When seeking medical attention bring a copy of this HF Fact Sheet, the Safety Data Sheet (SDS) for the product used, and the Honeywell guide, “Recommended Medical Treatment for Hydrofluoric Acid Exposure” to the Stanford Hospital Emergency Room.

To receive CEW Operator Certification for the Taser 7 in the province of Saskatchewan, municipal police officers must successfully complete the CPKN Conducted Energy Weapon Operator Training course and the AXON Taser 7 course prior to attending the practical hands-on component and final assessment (to be scheduled by the officer’s police agency).