Heptamethyldisilazane
Also known as: N,1,1,1-Tetramethyl-N-(trimethylsilyl)silanamine, N,N-bis(trimethylsilyl)methanamine, Silanamine, N,1,1,1-tetramethyl-N-(trimethylsilyl)-
Heptamethyldisilazane (CAS 920-68-3) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C7H21NSi2 and a molecular weight of 175.419 g/mol. Key properties include a boiling point of 149.0±23.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 43.9±22.6 °C. It is classified under GHS with signal word Warning and hazard statements H226 — Flammable liquid and vapour, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 920-68-3
- Jingsj CID
- J-34898-1
- Molecular Formula
- C7H21NSi2
- Molecular Weight
- 175.419 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 149.0±23.0 °C at 760 mmHg |
|---|---|
| Density | 0.8±0.1 g/cm3 |
| Flash Point | 43.9±22.6 °C |
| Exact Mass | 175.121246 |
| PSA | 3.24000 |
| LogP | 2.29 |
| Vapor Pressure | 4.1±0.3 mmHg at 25°C |
| Refractive Index | 1.414 |
| Additional Property | Decomposes |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2942000000 |
|---|
Frequently Asked Questions
What is the CAS number of Heptamethyldisilazane?
The CAS number of Heptamethyldisilazane is 920-68-3.
What are the molecular formula and molecular weight of Heptamethyldisilazane?
Heptamethyldisilazane has molecular formula C7H21NSi2 and molecular weight 175.419 g/mol.
Is Heptamethyldisilazane hazardous?
Heptamethyldisilazane has GHS signal word Warning and hazard statements H226 — Flammable liquid and vapour; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of Heptamethyldisilazane?
For Heptamethyldisilazane, Upstream Products: (Chloromethyl)trimethylsilane, Methyltrichlorosilane, Chlorotrimethylsilane; Downstream Products: Hexamethyldisiloxane, Methyl trifluoromethanesulfonate, 4-Methylphthalonitrile.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Heptamethyldisilazane (CAS 920-68-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-34898-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.