Calcium silicate

  • Calcium monosilicate
  • Calcium hydrosilicate
  • Calcium metasilicate
  • Silicic acid, calcium salt
Formula
CaSiO3
Structure
Description
White powder.
Uses
Constituent of lime glass, portland cement, reinforcing filler in elastomers & plastics, absorbent for liquids, gases, vapors, as suspension agent, pigment & pigment extender, binder for refractory material, in chromatography, in road construction.

Registry Numbers and Inventories.
CAS
1344-95-2
EC (EINECS/ELINCS)
215-710-8
RTECS
VV9150000
RTECS class
Other
Merck
12,1749
Beilstein/Gmelin
36889 (G)
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Ca2O4Si
Formula mass
116.16
Melting point, °C
1540
Density
2.9 g/cm3 (20 C)
Solubility in water
100 mg/L

Hazards and Protection.
Storage
Store in a cool, dry location. Keep container tightly closed.
Handling
Do not breath dust, avoid contact. Use material in a chemical hood.
Protection
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
NIOSH/MSHA approved respirator.
Small spills/leaks
Wear NIOSH/MSHA approved respirator, safety goggles and rubber gloves and boots. Sweep up and place in a bag and hold for waste disposal. Avoid raising dust, ventilate area and wash site after material pickup.
Stability
None specified.
Incompatibilities
Strong oxidizing agents.
Decomposition
Silicon oxide.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.

Health.
Exposure limit(s)
NIOSH REL: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp) OSHA PEL: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
Exposure effects
   Ingestion
Nausea, vomiting and diarrhea are possible if ingested.
   Inhalation
Cough, tachypnea, and wheezing are common after inhalation.
   Skin
Redness, swelling and pain may occur.
   Eyes
Irritants may cause swelling, redness and pain at any site, especially at mucous membranes. The mouth, nose, and eyes are susceptible to these effects.

First aid
 
   Ingestion
Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.
   Inhalation
If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
   Skin
Remove contaminated clothing. Wash exposed area with soap and water. If symptoms persist, seek medical attention. Launder clothing before reuse.
   Eyes
If symptoms develop, immediately move individual away from exposure and into fresh air. Flush eyes gently with water for at least 15 minutes while holding eyelids apart; seek immediate medical attention.

Transport.