1,3-Bis(trimethylsilyl)urea
Also known as: BSU, N,N'-Bis(trimethylsilyl)urea, Bis(trimethylsilyl)urea, Hexamethyl disilaurea, Urea, N,N'-bis(trimethylsilyl)-, Urea, TMS, bistrimethylsilylurea, MFCD00008260, EINECS 242-177-9
1,3-Bis(trimethylsilyl)urea (CAS 18297-63-7) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C7H20N2OSi2 and a molecular weight of 204.417 g/mol. Key properties include a melting point of 219-221 °C(lit.), a boiling point of 222°C, a density of 0.9±0.1 g/cm3 and a flash point of 65°C. It is classified under GHS with signal word Danger and hazard statements H228. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 18297-63-7
- Jingsj CID
- J-35917-1
- Molecular Formula
- C7H20N2OSi2
- Molecular Weight
- 204.417 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 219-221 °C(lit.) |
|---|---|
| Boiling Point | 222°C |
| Density | 0.9±0.1 g/cm3 |
| Flash Point | 65°C |
| Exact Mass | 204.111420 |
| PSA | 41.13000 |
| LogP | 1.76 |
| Vapor Pressure | 0.177mmHg at 25°C |
| Refractive Index | 1.427 |
GHS Safety & Compliance
- H228
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 1,3-Bis(trimethylsilyl)urea?
The CAS number of 1,3-Bis(trimethylsilyl)urea is 18297-63-7.
What are the molecular formula and molecular weight of 1,3-Bis(trimethylsilyl)urea?
1,3-Bis(trimethylsilyl)urea has molecular formula C7H20N2OSi2 and molecular weight 204.417 g/mol.
Is 1,3-Bis(trimethylsilyl)urea hazardous?
1,3-Bis(trimethylsilyl)urea has GHS signal word Danger and hazard statements H228.
What are the upstream and downstream products of 1,3-Bis(trimethylsilyl)urea?
For 1,3-Bis(trimethylsilyl)urea, Upstream Products: Urea, 1,1,1,3,3,3-Hexamethyldisilazane, N,O-Bis(trimethylsilyl)trifluoroacetamide; Downstream Products: O-Trimethylsilyl chloroacetate, Hexamethyldisiloxane, Trimethylsilyl isocyanate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1,3-Bis(trimethylsilyl)urea (CAS 18297-63-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-35917-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.