Calcium silicate
Synonyms & Trade Names
Calcium hydrosilicate, Calcium metasilicate, Calcium monosilicate, Calcium salt of silicic acidExposure Limits
NIOSH REL
TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)OSHA PEL
TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)Physical Description
White or cream-colored, free-flowing powder. [Note: The commercial product is prepared from diatomaceous earth & lime.]Molecular Weight
116.2Boiling Point
?Melting Point
2804°FSolubility
0.01%Vapor Pressure
0 mmHg (approx)Ionization Potential
NASpecific Gravity
2.9Flash Point
NAUpper Exposive Limit
NALower Explosive Limit
NA
Noncombustible Solid
Incompatibilities & Reactivities
None reported [Note: After prolonged contact with water, solution reverts to soluble calcium salts & amorphous silica.]Exposure Routes
inhalation, skin and/or eye contactSymptoms
irritation eyes, skin, upper respiratory systemTarget Organs
Eyes, skin, respiratory systemPersonal Protection/Sanitation
(See protection codes)Skin:No recommendation
Eyes:No recommendation
Wash skin:No recommendation
Remove:No recommendation
Change:No recommendation
Respirator Recommendations
Not available.
- Page last reviewed:April 11, 2016
- Page last updated:April 11, 2016
- Content source:
- National Institute for Occupational Safety and Health (NIOSH) Education and Information Division