Hexamethyldisiloxane
Also known as: HMDSO, HMDO, bis(trimethylsilyl)ether, 1,1,1,3,3,3-hexamethyldisiloxane, oxybis(trimethylsilane), 2,2,4,4-tetramethyl-3-oxa-2,4-disilapentane, SILICONE FLUID, SF 0.65, HX 18, OS-10
Hexamethyldisiloxane (CAS 107-46-0) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C6H18OSi2 and a molecular weight of 162.378 g/mol. Key properties include a melting point of −59 °C(lit.), a boiling point of 100.9±8.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of -1 ºC. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour and H410 — Very toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 107-46-0
- Jingsj CID
- J-44596-8
- Molecular Formula
- C6H18OSi2
- Molecular Weight
- 162.378 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | −59 °C(lit.) |
|---|---|
| Boiling Point | 100.9±8.0 °C at 760 mmHg |
| Density | 0.8±0.1 g/cm3 |
| Flash Point | -1 ºC |
| Exact Mass | 162.089615 |
| PSA | 9.23000 |
| LogP | 4.20 |
| Additional Property | >1 (vs air) |
| Vapor Pressure | 41.4±0.2 mmHg at 25°C |
| Refractive Index | 1.393 |
| Additional Property | insoluble |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H410 — Very toxic to aquatic life with long lasting effects
Customs & Trade Information
| HS Code | 2934999090 |
|---|---|
| Summary | 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of Hexamethyldisiloxane?
The CAS number of Hexamethyldisiloxane is 107-46-0.
What are the molecular formula and molecular weight of Hexamethyldisiloxane?
Hexamethyldisiloxane has molecular formula C6H18OSi2 and molecular weight 162.378 g/mol.
Is Hexamethyldisiloxane hazardous?
Hexamethyldisiloxane has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H410 — Very toxic to aquatic life with long lasting effects.
What are the upstream and downstream products of Hexamethyldisiloxane?
For Hexamethyldisiloxane, Downstream Products: Octamethyltrisiloxane, Decamethyltetrasiloxane, Dodecamethylpentasiloxane.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Hexamethyldisiloxane (CAS 107-46-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-44596-8 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.