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OCTAMETHYLCYCLOTETRASILOXANE ICSC: 0310
Date of Peer Review: October 2002

Cyclotetrasiloxane, octamethyl-
CAS # 556-67-2 C8H24O4Si4
RTECS # GZ4397000 Molecular mass: 296.6
UN #
EC # 014-018-00-1
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Flammable.
NO open flames.
Powder, alcohol-resistant foam, water in large amounts, carbon dioxide.
EXPLOSION


EXPOSURE
PREVENT GENERATION OF MISTS!

Inhalation
Ventilation.
Fresh air, rest.
Skin
Protective gloves.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes
Safety spectacles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Nausea. Vomiting.
Do not eat, drink, or smoke during work.
Rinse mouth. Do NOT induce vomiting. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Collect leaking liquid in covered containers.
EU Classification
Symbol: Xn
R: 53-62
S: (2-)-36/37-46-51-61
UN Classification

EMERGENCY RESPONSE STORAGE


IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 1999

SEE IMPORTANT INFORMATION ON BACK


OCTAMETHYLCYCLOTETRASILOXANE ICSC: 0310
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
OILY COLOURLESS LIQUID.

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its vapour, through the skin and by ingestion.

INHALATION RISK:
No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20C.

PHYSICAL PROPERTIES
Boiling point: 175C
Melting point: 17.5C
Relative density (water = 1): 0.96
Solubility in water: none
Vapour pressure, Pa at 21.7C: 133.3
Flash point: 56C
ENVIRONMENTAL DATA

NOTES

ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 1999