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Calcium silicate

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Synonyms & Trade Names
Calcium hydrosilicate, Calcium metasilicate, Calcium monosilicate, Calcium salt of silicic acid
CAS No.
1344-95-2
RTECS No.
VV9150000
DOT ID & Guide
Formula
CaSiO₃
Conversion
IDLH
N.D.
See: IDLH INDEX
Exposure 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)
Measurement Methods
NIOSH 7020;
OSHA ID121
See: NMAM or OSHA Methods
Physical Description
White or cream-colored, free-flowing powder. [Note: The commercial product is prepared from diatomaceous earth & lime.]
Molecular Weight
116.2
Boiling Point
?
Melting Point
2804°F
Solubility
0.01%
Vapor Pressure
0 mmHg (approx)
Ionization Potential
NA
Specific Gravity
2.9
Flash Point
NA
Upper Explosive Limit
NA
Lower 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 contact
Symptoms
irritation eyes, skin, upper respiratory system
Target Organs
Eyes, skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin:No recommendation
Eyes:No recommendation
Wash skin:No recommendation
Remove:No recommendation
Change:No recommendation
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash
Breathing:Fresh air
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 1401
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health