A soft, white crystalline powder (CaH2O2) that is alkaline, has a slightly bitter taste and is a skin irritant. See: Calcium Hydrate, Caustic Lime, Hydrated Lime, Slaked Lime
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}