Hydrogen Fluoride (Hydrofluoric Acid)

Hydrogen fluoride (HF) is a highly corrosive and acutely hazardous inorganic acid classified under a single US tariff line, 2811110000, and its import and handling are subject to EPA and OSHA regulatory oversight given its extreme toxicity. Commercially, HF is an essential reagent in petroleum alkylation, semiconductor etching, fluoropolymer production, and specialty chemical synthesis. Mexico leads US import supply, followed by Taiwan and Japan. Given its chemical weapons precursor potential, importers should be prepared for heightened customs scrutiny and documentation requirements.