Cyclotetrasiloxane, octamethyl-
C8H24O4Si4
Molecular mass: 296.6
ICSC # 0310
CAS # 556-67-2
RTECS # GZ4397000
EC # 014-018-00-1
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Flammable.
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NO open flames.
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Powder, alcohol-resistant foam, water in large amounts, carbon dioxide.
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Explosion
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Exposure
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PREVENT GENERATION OF MISTS!
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•Inhalation
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Ventilation.
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Fresh air, rest.
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•Skin
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Protective gloves.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
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•Eyes
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Safety spectacles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Nausea.
Vomiting.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Do NOT induce vomiting.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Collect leaking liquid in covered containers.
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Xn symbol
R: 53-62
S: 2-36/37-46-51-61
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Important Data
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Physical State; Appearance:
OILY
COLOURLESS LIQUID.
Physical Dangers:
Chemical Dangers:
Occupational Exposure Limits:
TLV not established.
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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 20°C.
Effects of Short-Term Exposure:
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: 175°C
Melting point: 17.5°C
Relative density (water = 1): 0.96
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Solubility in water: none
Vapour pressure, Pa at 21.7°C: 133.3
Flash point: 56°C
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Environmental
Data
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N O T E S
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ADDITIONAL INFORMATION
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ICSC: 0310
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OCTAMETHYLCYCLOTETRASILOXANE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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