1,3-Bis(trimethylsilyl)urea
Synonym(s):N,N′-Bis(trimethylsilyl)urea;BSU
- CAS NO.：18297-63-7
- Empirical Formula: C7H20N2OSi2
- Molecular Weight: 204.42
- MDL number: MFCD00008260
- EINECS: 242-177-9
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-12 09:16:51
What is 1,3-Bis(trimethylsilyl)urea?
Chemical properties
White solid with mild odor
The Uses of 1,3-Bis(trimethylsilyl)urea
N,N'-Bis(trimethylsilyl)urea is used as a reagent for the silylation of alcohols and carboxylic acids.
Flammability and Explosibility
Not classified
Properties of 1,3-Bis(trimethylsilyl)urea
| Melting point: | 219-221 °C(lit.) |
| Boiling point: | 222°C |
| Density | 0.887 |
| vapor pressure | 0.002-1850Pa at 25℃ |
| Flash point: | 65°C |
| storage temp. | Inert atmosphere,Room Temperature |
| solubility | pyridine: soluble100mg/mL, clear to slightly hazy, colorless to light yellow |
| form | solid |
| pka | 16.51±0.46(Predicted) |
| color | White to Almost white |
| Water Solubility | Reacts with water. |
| Sensitive | Moisture Sensitive |
| Hydrolytic Sensitivity | 7: reacts slowly with moisture/water |
| BRN | 1937452 |
| CAS DataBase Reference | 18297-63-7(CAS DataBase Reference) |
| NIST Chemistry Reference | Urea, n,n'-bis(trimethylsilyl)-(18297-63-7) |
| EPA Substance Registry System | N,N'-Bis(trimethylsilyl)urea (18297-63-7) |
Safety information for 1,3-Bis(trimethylsilyl)urea
| Signal word | Danger |
| Pictogram(s) |
 Flame Flammables GHS02 |
| GHS Hazard Statements |
H228:Flammable solids |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. |
Computed Descriptors for 1,3-Bis(trimethylsilyl)urea
| InChIKey | MASDFXZJIDNRTR-UHFFFAOYSA-N |
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