2nd cycle of RFID chemical inventory reconciliation starts in August!
Hydrofluoric Acid Generators
Many chemicals containing fluoride can potentially release hydrofluoric acid (HF) and pose serious health risks depending on how they are used (e.g. inert atmosphere glove box vs. conditions exposing the chemical to water/moisture). HF generators include, but are not limited to, bifluoride/hydrogen difluoride salts, ammonium fluoride, alkali metal fluorides, sulfur tetrafluoride, fluoroboric acid, tetrafluoroborate salts, hexafluorophosphate salts, etc.
Identifying HF Generators
HF-producing materials/compounds are identifiable by their first aid procedures listed in Section 4.1: Description of first-aid measures, indicating that the use of Calcium Gluconate (Calgonate) is needed. The first aid measures for HF-producing materials/compounds are the same as for HF itself. HF generators may also be identified by section 2.3 Hazards not otherwise classified (HNOC) listing phrases including "Strong hydrogen fluoride-releaser" or "Weak hydrogen fluoride-releaser".
HF generators should be labeled for identification. Labels can be requested through the Secondary and Sample Container Labels Request Form.
HF Response Kits
Exposure to HF or HF Generators must be treated with Ca Gluconate. Affected area should be rinsed, but rinsing does not affect the fluoride ions, which may have penetrated to the deep tissue layers. Hydrofluoric acid exposure kits are available through Health Services (ext. 6266). Calcium Gluconate must be acquired through Health Services as medical supplies are a restricted purchasing item.
Hydrofluoric acid cannot be cleaned up with normal acid spill kits. Do not use silica-containing agents, especially diatomaceous earth (kitty litter) and sand, to absorb hydrofluoric acid, because they can react with HF to form toxic silicon tetrafluoride gas. Use spill kits such as HF Acid Eater (2 gal), or HF Acid Eater (0.13 gal). HF is a weak acid and does not completely dissociate. Therefore, sufficient time must be allowed for the neutralizing agent to neutralize the acid.