Density: 2.3 lb/cu.ft at 25 °C (bulk density)(lit.)
Refractive index: 20/D 1.46(lit.)
Water Solubility: insoluble
Safety Statements: Poison by intraperitoneal, intravenous, and intratracheal routes. Moderately toxic by ingestion. An inhalation hazard. Much less toxic than crystalline forms. Questionable carcinogen with experimental carcinogenic data. Mutation data reported. Does not cause silicosis. See also SILICA, AMORPHOUS FUME; SILICA, AMORPHOUS HYDRATED; SILICA, CRYSTALLINE; SILICA, CRYSTALLINE–CRISTOBALITE; SILICA, CRYSTALLINE–QUARTZ; SILICA, CRYSTALLINE–TRIDYMITE; SILICA FLOUR; SILICA, FUSED; SILICA, GEL and AMORPHOUS–PRECIPITATED.Analytical Methods: For occupational chemical analysis use OSHA: #ID-125 g or NIOSH: 1994: Silica, Amorphous, 7501.
