Octamethylcyclotetrasiloxane (D4)
It is colorless, inflammable, and can not dissolve in water, but dissolve in organic solvents such as benzene, etc.
Product Overview
Structural formula
Product Code: SC-D4
UN NO.: 1993
Molecular Formula: [(CH3) 2SiO]4
Molecular Weight: 296
UN NO.: 1993
Dangerous Rating: 3
Package Class: III
Technical Data
| Appearance | colorless clear liquid |
| Odour | odorless |
| Content of D4 (%) | ≥99.0% |
| Viscosity, dynamic (mPa.s) | 2.7 mPa.s @ 25℃ |
| Molecular formula | C8H24O4Si4 |
| Molecular weight | 296.61 |
| Refractive index (ηD 20) | 1.396 – 1.397 |
| Melting point/range(℃) | 17-18 ℃ |
| Boiling point/range(℃) | 175-176 ℃@760 mm Hg |
| Flash point/range(℃) | 55 ℃ |
| Flammability limit-lower(%) | 0.75 |
| Vapour pressure(20℃) | 1 mm Hg @21.7 |
| Vapour density | 10.23 |
| Bulk density(kg/m3) | 9.5 |
| Water solubility(g/l) | Insoluble |
| n-Octanol/water(log Po/w) | 6.488@25℃ |
| Auto-ignition temperature | 384-387 ℃ |
Applications
It can be used to synthesize organic silicon polymer by acid or alkali catalysis to manufacture silicone oil, silicone rubber, etc. It can also be used directly as treating agent for rubber stuffing and the raw material for cosmetic.
Package, storage
Steel drum, net weight 190 kg/drum or International Bulk Container, net weight 950kg/IBC or ISO TANK. Store in a cool, dry, well-ventilated area and keep away from oxidant, acid and alkali. The storage area should be equipped with the corresponding species and quantity of fire equipment and leakage emergency equipment. Handling according to hazardous substances. Be careful when loading and unloading to avoid damages of the package.
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Product Name: Octamethylcyclotetrasiloxane (D4)
