- Cyclic dimethylsiloxane tetramer
- Dow Corning 344
- Silbione V 2
- Union Carbide 7207
- Volasil 244
Prepn of methyl silicon oils.
Registry Numbers and Inventories.
EC Index Number
Toxic for reproduction Category 3; Dangerous for the Environment
R 53 61
S 36/37 46 51 61
Reproductive Effector; Primary Irritant
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
Vapor density (air=1)
Solubility in water
2.24 cp (25 C)
1.3965 (20 C)
Heat of combustion
Hazards and Protection.
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.
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.
Wear appropriate protective gloves, clothing and goggles.
Wear positive pressure self-contained breathing apparatus (SCBA).
Make no contact with the spilled material. ELIMINATE all ignition sources and ground all equipment. Stop leak if you can do it without risk. A vapor suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean non-sparking tools to collect absorbed material.
Upper exp. limit, %
Lower exp. limit, %
Use of water spray when fighting fire may be inefficient. Small Fires: Dry chemical, carbon dioxide, water spray or alcohol-resistant foam. Large Fires: Water spray, fog or alcohol-resistant foam. Use water spray or fog; do not use straight streams.
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
Fire may produce irritating, corrosive and/or toxic gases.
The toxological properties of this substance have not been fully investigated.
Silicone injection has been associated with the development of fatal pulmonary edema, pneumonitis, pleural effusion, ards and dyspnea.
Hypopigmentation and peau d'orange skin changes have been reported after silicone injection or implantation.
Seek medical assistance.
Inhalation hazard is low due to the low vapor pressure of most silicone fluids. Treatment is symptomatic and supportive.
Remove and isolate contaminated clothing and shoes. Wash skin with soap and water. Flush with running water for at least 20 minutes
Flush with running water for at least 20 minutes.
I; II; III
2931 00 95