Hydrofluoric Acid 1 : A colorless, fuming, mobile liquid (HF) that will attack glass or any silicacontaining material, is highly corrosive to the skin and mucous membranes, and is highly toxic by ingestion and inhalation
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}