Data is derived from NIOSH’s Emergency Response Safety and Health Database HYDROGEN FLUORIDE/ HYDROFLUORIC ACID (UN 1052) CAS #: 7664-39-3 RTECS #: MW7875000 UN #: 1052 (hydrogen fluoride, anhydrous) (Guide 125) 1790 (hydrofluoric acid) (Guide 157) Common Names: Fluoric acid HF Fluorhydric acid Agent Characteristics APPEARANCE: Hydrogen fluoride is a colorless fuming liquid below 67°F...