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ChemicalBook >> CAS DataBase List >> 1,3-Bis(trimethylsilyl)urea


1,3-Bis(trimethylsilyl)urea price.
  • $15.7 - $57.9
  • Product name: 1,3-Bis(trimethylsilyl)urea
  • CAS: 18297-63-7
  • MF: C7H20N2OSi2
  • MW: 204.42
  • EINECS:242-177-9
  • MDL Number:MFCD00008260
  • Synonyms:Urea, TMS;N,N'-BIS(TRIMETHYLSILYL)UREA;BIS(TRIMETHYLSILYL)UREA;BSU;N N'-BIS(TRIMETHYLSILYL)UREA 98+%;Hexamethyl disilaurea;Bis(trimethylsilyl) derivative of Urea;n,n’-bis(trimethylsilyl)-ure
5 prices
Selected condition:


  • Alfa Aesar
  • Sigma-Aldrich
  • TCI Chemical


  • 25g
  • 50g
  • 250g
  • ManufacturerAlfa Aesar
  • Product numberL01301
  • Product descriptionN,N'-Bis(trimethylsilyl)urea, 98+%
  • Packaging50g
  • Price$15.7
  • Updated2018-11-13
  • Buy
  • ManufacturerAlfa Aesar
  • Product numberL01301
  • Product descriptionN,N'-Bis(trimethylsilyl)urea, 98+%
  • Packaging250g
  • Price$57.9
  • Updated2018-11-13
  • Buy
  • ManufacturerSigma-Aldrich
  • Product number15248
  • Product descriptionN,N′-Bis(trimethylsilyl)urea purum, ≥98.0% (N)
  • Packaging250g
  • Price$49.3
  • Updated2018-11-13
  • Buy
  • ManufacturerSigma-Aldrich
  • Product number226106
  • Product description1,3-Bis(trimethylsilyl)urea 95%
  • Packaging50g
  • Price$24.8
  • Updated2018-11-13
  • Buy
  • ManufacturerTCI Chemical
  • Product numberB1103
  • Product descriptionN,N'-Bis(trimethylsilyl)urea >98.0%(N)
  • Packaging25g
  • Price$33
  • Updated2018-11-22
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
Alfa Aesar L01301 N,N'-Bis(trimethylsilyl)urea, 98+% 50g $15.7 2018-11-13 Buy
Alfa Aesar L01301 N,N'-Bis(trimethylsilyl)urea, 98+% 250g $57.9 2018-11-13 Buy
Sigma-Aldrich 15248 N,N′-Bis(trimethylsilyl)urea purum, ≥98.0% (N) 250g $49.3 2018-11-13 Buy
Sigma-Aldrich 226106 1,3-Bis(trimethylsilyl)urea 95% 50g $24.8 2018-11-13 Buy
TCI Chemical B1103 N,N'-Bis(trimethylsilyl)urea >98.0%(N) 25g $33 2018-11-22 Buy


Melting point: :219-221 °C(lit.)
Boiling point: :222°C
Density  :0.887
Flash point: :65°C
storage temp.  :2-8°C
solubility  :pyridine: soluble100mg/mL, clear to slightly hazy, colorless to light yellow
form  :solid
Water Solubility  :Reacts with water.
Sensitive  :Moisture Sensitive
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 :Urea, N,N'-bis(trimethylsilyl)- (18297-63-7)

Safety Information

Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H228 Flammable solid Flammable solids Category 1
Category 2
P210, P240,P241, P280, P370+P378
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P240 Ground/bond container and receiving equipment.
P241 Use explosion-proof electrical/ventilating/lighting/…/equipment.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.


N,N'-Bis(trimethylsilyl)urea is used as a reagent for the silylation of alcohols and carboxylic acids.

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