1,5-Dichlorohexamethyltrisiloxane

  • Hexamethyl-1,5-dichlorotrisiloxane
  • Bis(chlorodimethylsiloxy)dimethylsilane
  • 1,5-Dichloro-1,1,3,3,5,5-hexamethyltrisiloxane
  • 1,1,3,3,5,5-Hexamethyl-1,5-dichlorotrisiloxane
Formula
C6H18Cl2O2Si3
Structure
Description
Straw-colored - amber liquid. Acrid odor.

Registry Numbers and Inventories.
CAS
3582-71-6
EC (EINECS/ELINCS)
222-707-5
S 26 36/37/39 45
UN (DOT)
2987
Beilstein/Gmelin
1763185
Beilstein Reference
4-04-00-04123
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed

Properties.
Formula
C6H18Cl2O2Si3
Formula mass
277.37
Melting point, °C
-53
Boiling point, °C
182 - 183
Density
1.0272 g/cm3 (20 C)
Solubility in water
Insoluble
Refractive index
1.41 (20 C)

Hazards and Protection.
Storage
Store in a cool, dry place. Store in a tightly closed container. Corrosives area.
Handling
Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use only in a chemical fume hood.
Protection
Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container.
Stability
Stable under normal shipping and handling conditions.
Incompatibilities
Strong oxidizing agents, strong bases, alcohols, amines.
Decomposition
Hydrogen chloride, carbon monoxide, carbon dioxide, oxides of silicon.

Fire.
Flash Point,°C
76
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. Combustible Liquid. Extinguishing media: Use foam, dry chemical, or carbon dioxide. DO NOT USE WATER!

Health.
Exposure effects
   Ingestion
Causes gastrointestinal tract burns. The toxicological properties of this substance have not been fully investigated.
   Inhalation
May cause irritation of the respiratory tract with burning pain in the nose and throat, coughing, wheezing, shortness of breath and pulmonary edema. Causes chemical burns to the respiratory tract. The toxicological properties of this substance have not been fully investigated. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema.
   Skin
Causes skin burns. May cause dermatitis.
   Eyes
Causes eye burns.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2987
Response guide