Potassium bis(trimethylsilyl)amide
Also known as: Potassium hexamethyldisilazide, KHMDS, 1,1,1,3,3,3-Hexamethyldisilazane potassium salt, Potassium 1,1,1,3,3,3-hexamethyldisilazan-2-ide, Silanamine, 1,1,1-trimethyl-N-(trimethylsilyl)-, potassium salt (1:1), potassium,bis(trimethylsilyl)azanide, MFCD00010330, Hexamethyldisilazane potassium salt, POTASSIUM BIS(TRIMETHYLSILYL)AMIDE, POTASSIUM HEXAMETHYLDISILAZIDE, 1-SI-1&1&NK-SI-1&1&1, 1-SI-1&1&M-SI-1&1&1 &&K salt
Potassium bis(trimethylsilyl)amide (CAS 40949-94-8) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C6H18KNSi2 and a molecular weight of 199.483 g/mol. Key properties include a boiling point of 111 °C, a density of 0.877 g/mL at 25 °C and a flash point of 7.2 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H304 and H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.
- CAS No.
- 40949-94-8
- Jingsj CID
- J-44469-9
- Molecular Formula
- C6H18KNSi2
- Molecular Weight
- 199.483 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 11/2/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 111 °C |
|---|---|
| Density | 0.877 g/mL at 25 °C |
| Flash Point | 7.2 °C |
| Exact Mass | 199.061478 |
| PSA | 3.24000 |
| LogP | 2.42250 |
| Additional Property | 3.2 (vs air) |
| Vapor Pressure | 54 mm Hg ( 25 °C) |
| Refractive Index | 1.4920 |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H304
- H314 — Causes severe skin burns and eye damage
- H336 — May cause drowsiness or dizziness
- H373 — May cause damage to organs through prolonged exposure
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 Potassium bis(trimethylsilyl)amide?
The CAS number of Potassium bis(trimethylsilyl)amide is 40949-94-8.
What are the molecular formula and molecular weight of Potassium bis(trimethylsilyl)amide?
Potassium bis(trimethylsilyl)amide has molecular formula C6H18KNSi2 and molecular weight 199.483 g/mol.
Is Potassium bis(trimethylsilyl)amide hazardous?
Potassium bis(trimethylsilyl)amide has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H304; H314 — Causes severe skin burns and eye damage.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Potassium bis(trimethylsilyl)amide (CAS 40949-94-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-44469-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.