1,1,1,3,3,3-Hexamethyldisilazane
Also known as: Hexamethyldisilazane, HMDS, Bis(trimethylsilyl)amine, 1,1,1-Trimethyl-N-(trimethylsilyl)silanamine, Silanamine, 1,1,1-trimethyl-N-(trimethylsilyl)-, DYNASYLAN HMDS, HMDZ, Silazane HMN, tsl8802
1,1,1,3,3,3-Hexamethyldisilazane (CAS 999-97-3) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C6H19NSi2 and a molecular weight of 161.393 g/mol. Key properties include a melting point of -78 °C, a boiling point of 126.0±9.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 30.0±18.7 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H302 — Harmful if swallowed and H332 — Harmful if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 999-97-3
- Jingsj CID
- J-2845-5
- Molecular Formula
- C6H19NSi2
- Molecular Weight
- 161.393 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -78 °C |
|---|---|
| Boiling Point | 126.0±9.0 °C at 760 mmHg |
| Density | 0.8±0.1 g/cm3 |
| Flash Point | 30.0±18.7 °C |
| Exact Mass | 161.105606 |
| PSA | 12.03000 |
| LogP | 2.32 |
| Vapor Pressure | 11.9±0.2 mmHg at 25°C |
| Refractive Index | 1.404 |
| Additional Property | REACTS |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H302 — Harmful if swallowed
- H332 — Harmful if inhaled
- H311 — Toxic in contact with skin
- H412 — Harmful to aquatic life with long lasting effects
Customs & Trade Information
| HS Code | 2931900090 |
|---|---|
| Summary | 2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 1,1,1,3,3,3-Hexamethyldisilazane?
The CAS number of 1,1,1,3,3,3-Hexamethyldisilazane is 999-97-3.
What are the molecular formula and molecular weight of 1,1,1,3,3,3-Hexamethyldisilazane?
1,1,1,3,3,3-Hexamethyldisilazane has molecular formula C6H19NSi2 and molecular weight 161.393 g/mol.
Is 1,1,1,3,3,3-Hexamethyldisilazane hazardous?
1,1,1,3,3,3-Hexamethyldisilazane has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H302 — Harmful if swallowed; H332 — Harmful if inhaled.
What are the upstream and downstream products of 1,1,1,3,3,3-Hexamethyldisilazane?
For 1,1,1,3,3,3-Hexamethyldisilazane, Upstream Products: Chlorotrimethylsilane, Bromotrimethylsilane, Bis(trimethylsilyl) sulfate; Downstream Products: trimethyl(4-nitrophenoxy)silane, Trimethylsilyl trimethylsiloxyacetate, 1-(2-Furoyl)piperazine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1,1,1,3,3,3-Hexamethyldisilazane (CAS 999-97-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-2845-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.