2,4,6-Trimethyl-2,4,6-triphenylcyclotrisiloxane

  • Phenylmethylsiloxane cyclic trimer
  • Trimethyltriphenylcyclotrisiloxane
Formula
C21H24O3Si3
Structure

Registry Numbers and Inventories.
CAS
546-45-2
EC (EINECS/ELINCS)
208-900-7
Beilstein/Gmelin
2954104
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed

Properties.
Formula
C21H24O3Si3
Formula mass
408.68
Melting point, °C
95
Boiling point, °C
375
Vapor pressure, mmHg
2.6E-6 (25 C)
Density
1.102 g/cm3 (20 C)
Refractive index
1.5410 (20 C)
Heat of vaporization
62.80 kJ/mol

Hazards and Protection.
Protection
Compatible chemical-resistant gloves. Chemical safety goggles. Protective clothing.
Small spills/leaks
Absorb on sand or vermiculite and place in closed containers for disposal. Wash spill site with soap solution. Flush spill area with copious amounts of water.

Fire.
Flash Point,°C
163
Fire fighting
Extinguish with water spray, carbon dioxide, dry chemical powder or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Hazards
Emits toxic fumes under fire conditions.

Health.
Exposure effects

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water. Remove contaminated clothing and shoes. Call a physician.
   Eyes
In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.

Transport.