- Octamethyltrisiloxane
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- $10.00 / 1KG
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2026-01-29
- CAS:107-51-7
- Min. Order: 1KG
- Purity: 99%
- Supply Ability: 10 mt
- Octamethyltrisiloxane
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- $0.00 / 200KG
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2025-06-27
- CAS:107-51-7
- Min. Order: 1KG
- Purity: 99%
- Supply Ability: 500000kg
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| | Octamethyltrisiloxane Basic information |
| | Octamethyltrisiloxane Chemical Properties |
| Melting point | -82 °C (lit.) | | Boiling point | 153 °C (lit.) | | density | 0.82 g/mL at 25 °C (lit.) | | vapor density | >1 (vs air) | | vapor pressure | 5.3hPa at 25℃ | | refractive index | n20/D 1.384(lit.) | | Fp | 99 °F | | storage temp. | Inert atmosphere,Room Temperature | | solubility | Chloroform (Slightly), DMSO, Methanol (Slightly) | | form | liquid | | Specific Gravity | 0.82 | | color | Colourless to Pale Yellow | | Water Solubility | 34μg/L at 23℃ | | Hydrolytic Sensitivity | 1: no significant reaction with aqueous systems | | Merck | 14,6748 | | BRN | 1753063 | | Dielectric constant | 2.3（20℃） | | Stability: | Hygroscopic | | Cosmetics Ingredients Functions | SKIN CONDITIONING - MISCELLANEOUS
ANTIFOAMING | | InChI | 1S/C8H24O2Si3/c1-11(2,3)9-13(7,8)10-12(4,5)6/h1-8H3 | | InChIKey | CXQXSVUQTKDNFP-UHFFFAOYSA-N | | SMILES | C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C | | LogP | 6.6 at 25.3℃ | | CAS DataBase Reference | 107-51-7(CAS DataBase Reference) | | EPA Substance Registry System | Trisiloxane, octamethyl- (107-51-7) |
| Risk Statements | 10 | | Safety Statements | 23-24/25 | | RIDADR | UN 1993 3/PG 3 | | WGK Germany | 3 | | F | 10-21 | | TSCA | TSCA listed | | HazardClass | 3.2 | | PackingGroup | III | | HS Code | 29319090 | | Storage Class | 3 - Flammable liquids | | Hazard Classifications | Flam. Liq. 3 |
| | Octamethyltrisiloxane Usage And Synthesis |
| Chemical Properties | Octamethyltrisiloxane is clear colourless liquid. | | Uses | Octamethyltrisiloxane is a linear silicone oligomer. It is used as an excipient Dimethicones in pharmaceutical and cosmetic applications can provide long lasting lubricant, smooth feel and spreads easily. Studies demonstrate that it is able to maintain the conformational stability of certain adsorbed proteins such as bovine serum albumin (BSA). Used in the methylation of mercury(II) salts. | | Application | As a basis for silicone oils or fluids designed to withstand extremes of temp; as a foam suppressant in petroleum lubricating oil. | | Definition | ChEBI: Octamethyltrisiloxane is an organosiloxane that is trisiloxane in which all the hydrogens have been replaced by methyl groups. | | General Description | Poly(dimethylsiloxane) (PDMS), also known as dimethicone, is an organosilicon compound that is widely used as a siloxane based elastomer. It is a hydrophobic material with attractive physical and chemical properties such as elasticity, optical transparency, tunable surface chemistry, and low electrical conductivity. | | Flammability and Explosibility | Flammable | | Synthesis | The synthesis of polyether-modified polysiloxane copolymer adopts the condensation method, in which hydrogen-containing silicone oil and polyether are condensed and grafted under the action of catalyst. In a four-mouth flask equipped with a stirrer, condenser, thermometer and hydrogen export device, add hydrogen-containing silicone oil, polyether, solvent and catalyst according to the proportion, open the stirrer, slowly heated to a certain temperature, at this time, there is hydrogen escaped to produce bubbles, when the conversion rate to a certain value, lower the temperature, add alkali and neutralization, after filtration and distillation under reduced pressure to remove the catalyst and solvent residue, i.e., polyether-modified polysiloxane copolymers. Octamethyltrisiloxane is prepared by nitrile condensation reaction with polydimethylsiloxane and octamethylcyclotetrasiloxane as starting materials. | | Purification Methods | Distil it twice, the middle fraction from the first distillation is again distilled, and the middle fraction of the second distillation is used. [Patnode & Wilcock J Am Chem Soc 68 358, Wolcock J Am Chem Soc 68 691 1946, Thompson J Chem Soc 1908 1953, Beilstein 4 IV 4115.] | | Toxics Screening Level | The initial threshold screening level (ITSL) for octamethyltrisiloxane (CASRN 107-51-7) remains
at 0.1 μg/m 3 based on an annual averaging time. |
| | Octamethyltrisiloxane Preparation Products And Raw materials |
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