Synonyms: Silicic Acid (H2Si03) Disodium Salt; Crystamet; Disodium Metasilicate; Disodium Monosilicate; Orthosil; Metso Beads, Drymet; Sodium Metasilicate, Anhydrous; Sodium Silicate; Water Glass
OSHA IMIS Code Number: S245
Chemical Abstracts Service (CAS) Registry Number: 6834-92-0
NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: VV9275000
Chemical Description and Physical Properties:
Usually obtained as a glass; also orthorhombic crystals. Usually prepared from sand (SiO2) and soda ash (NaCO3) by fusion. Soluble in cold water, hydrolyzed by hot water. Insoluble in alcohol, acids, salt solutions.
molecular weight: 122.07
molecular formula: O3Si•2Na
melting point: 1089°C
Health Effects: Severe skin irritation; inhalation of dusts can irritate upper respiratory tract.
Primary Laboratory Sampling/Analytical Method (SLC1):
- note: Call the Salt Lake Technical Center for instructions.
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