Tricalcium silicate

  • Calcium oxide silicate
  • Tricalcium silicon pentaoxide
Formula
Ca3OSIO4
Structure
Description
Light yellowish-green to brown crystals
Uses
Absorbent for liq, gases, vapors, in chromatography, road construction calcium silicates constituent of lime glass, reinforcing filler in elastomers & plastics, suspension agent, pigment & pigment extender, binder for refractory material calcium silicates.

Registry Numbers and Inventories.
CAS
12168-85-3
EC (EINECS/ELINCS)
235-336-9
Beilstein/Gmelin
77790 (G)
EPA OPP
72607
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Ca3O5Si
Formula mass
228.32
Decomposition point, °C
1175
Density
3.25 g/cm3 (25 C)
Refractive index
1.709

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume 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
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Small spills/leaks
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Stability
No data.
Incompatibilities
Strong oxidizing agents.

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 effects
   Ingestion
Ingestion of either the powder or liquid forms may cause burns of the esophagus and stomach.
   Inhalation
Bronchitis and emphysema have been reported after many years of exposure to cement manufacturing.
   Skin
First, second, and third degree burns may occur 12 to 48 hours after exposures of 1 to 6 hours. Burns may arise without obvious pain at the time of exposure.

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
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothes. Irrigate exposed skin with copious amounts of water for at least 15 minutes or longer (until the slippery feeling is gone), depending on amount and duration of exposure to cement. A physician may need to examine the area if irritation or pain persist. Rinsing the area with 50% dextrose water retards the hardening process allowing more time for adequate removal of the corrosive agent. Irrigation usually prevents any burns from developing. Once the cement is hardened, debridement and even skin grafting has been necessary.
   Eyes
Home irrigation - exposed eyes should be irrigated with copious amounts of water for at least 30 minutes. An examination should always be performed. Ophthalmologic consultation should be obtained. Medical facility: irrigate with sterile 0.9% Saline for at least an hour or until the cul-de-sacs are free of particulate matter and returned to neutrality (confirm with pH paper).

Transport.