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Sodium bis(trimethylsilyl)amide

Also known as: NaHMDS, Sodium hexamethyldisilazane, Sodium hexamethyldisilazide, HMDSNa, N-Sodiohexamethyldisilazane, Sodiobis(trimethylsilyl)amine, Sodium 1,1,1,3,3,3-hexamethyldisilazan-2-ide, Silanamine, 1,1,1-trimethyl-N-(trimethylsilyl)-, sodium salt, Hexamethyldisilazane sodium salt, Bis(trimethylsilyl)amine sodium salt

Sodium bis(trimethylsilyl)amide (CAS 1070-89-9) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C6H18NNaSi2 and a molecular weight of 183.375 g/mol. Key properties include a melting point of 171-175 °C(lit.), a boiling point of 67°C, a density of 0.904 g/mL at 25 °C and a flash point of 6.1 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour 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.
1070-89-9
Jingsj CID
J-48750-3
Molecular Formula
C6H18NNaSi2
Molecular Weight
183.375 g/mol
Category
Organic Compounds
Last updated
11/2/2026
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Physicochemical Properties

Melting Point171-175 °C(lit.)
Boiling Point67°C
Density0.904 g/mL at 25 °C
Flash Point6.1 °C
Exact Mass183.087540
PSA3.24000
LogP2.42250

GHS Safety & Compliance

Flammable / CorrosionSignal word: Danger
  • H225 — Highly flammable liquid and vapour
  • H314 — Causes severe skin burns and eye damage

Customs & Trade Information

HS Code2931900090
Summary2931900090. 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 Sodium bis(trimethylsilyl)amide?

The CAS number of Sodium bis(trimethylsilyl)amide is 1070-89-9.

What are the molecular formula and molecular weight of Sodium bis(trimethylsilyl)amide?

Sodium bis(trimethylsilyl)amide has molecular formula C6H18NNaSi2 and molecular weight 183.375 g/mol.

Is Sodium bis(trimethylsilyl)amide hazardous?

Sodium bis(trimethylsilyl)amide has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H314 — Causes severe skin burns and eye damage.

What are the upstream and downstream products of Sodium bis(trimethylsilyl)amide?

For Sodium bis(trimethylsilyl)amide, Upstream Products: 1,1,1,3,3,3-Hexamethyldisilazane; Downstream Products: Heptamethyldisilazane, Tris[N,N-bis(trimethylsilyl)amide]cerium(III), tert-Butyl (4-methylpyridin-3-yl)carbamate.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Sodium bis(trimethylsilyl)amide (CAS 1070-89-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-48750-3 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.