Pentamethyldisilane
Also known as: 1,1,1,2,2-pentamethyldisilane, disilane, 1,1,1,2,2-pentamethyl-, Me3SiSiHMe2, HSiMe2SiMe3, (CH3)3SiSiH(CH3)2, (Me3Si)SiMe2H, MFCD03427188
Pentamethyldisilane (CAS 812-15-7) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C5H15Si2 and a molecular weight of 132.35200 g/mol. Key properties include a boiling point of 98-99ºC(lit.), a density of 0.722 g/mL at 25ºC(lit.) and a flash point of -10.0 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.
- CAS No.
- 812-15-7
- Jingsj CID
- J-1991666-6
- Molecular Formula
- C5H15Si2
- Molecular Weight
- 132.35200 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 11/2/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 98-99ºC(lit.) |
|---|---|
| Density | 0.722 g/mL at 25ºC(lit.) |
| Flash Point | -10.0 °C |
| Exact Mass | 132.07900 |
| LogP | 1.88970 |
| Refractive Index | n20/D 1.4240(lit.) |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
Frequently Asked Questions
What is the CAS number of Pentamethyldisilane?
The CAS number of Pentamethyldisilane is 812-15-7.
What are the molecular formula and molecular weight of Pentamethyldisilane?
Pentamethyldisilane has molecular formula C5H15Si2 and molecular weight 132.35200 g/mol.
Is Pentamethyldisilane hazardous?
Pentamethyldisilane has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour.
What are the upstream and downstream products of Pentamethyldisilane?
For Pentamethyldisilane, Upstream Products: Trimethylsilane, Dodecamethylcyclohexasilane, Dichlorodimethylsilane; Downstream Products: Chlorotrimethylsilane, Trimethylsilane, Chlorodifluoromethane.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Pentamethyldisilane (CAS 812-15-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1991666-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.