Bromotrimethylsilane(TMBS) - ≥90%, stabilized with copper , CAS No.2857-97-8

CAS: 2857-97-8 Cat. No.: B140645 Formula: C3H9BrSi Molecular Weight: 153.09 Beilstein Registry Number: 1731135 EC Number: 220-672-0
AVAILABLE TO ORDER
GRADE & PURITY ≥90% stabilized with copper
Synonyms
0K2L2IJ59O | Bromotrimethylsilane | bromo-trimethyl-silane | Bromotrimethylsilane, 97% | EC 220-672-0 | trimethylsilylbromide | UNII-JHH5G299BX | J-519952 | EN300-29777 | Trimethylbromosilane | NSC139857 | NSC-139857 | (CH3)3SiBr | GS3K23H1Q8 | bromo trim
Storage
Store at 2-8°C,Argon charged
Shipped In
Wet ice
★
Size
USA
Germany (EU)*
Price
Qty
100g
B140645-100g
1 In stock
—
$45.90
500g
B140645-500g
1 In stock
—
$119.90
Enter a quantity for the sizes you want to add.
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Why this grade

≥90%, stabilized with copper for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Store at 2-8°C,Argon charged Ships Wet ice Check lot-specific COA for exact specifications.

📋

Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 19 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
0K2L2IJ59O | Bromotrimethylsilane | bromo-trimethyl-silane | Bromotrimethylsilane, 97% | EC 220-672-0 | trimethylsilylbromide | UNII-JHH5G299BX | J-519952 | EN300-29777 | Trimethylbromosilane | NSC139857 | NSC-139857 | (CH3)3SiBr | GS3K23H1Q8 | bromo trim
Specifications & Purity
≥90%, stabilized with copper
Storage
Store at 2-8°C,Argon charged
Shipped In
Wet ice
This product requires cold chain shipping. Ground and other economy services are not available.
Purity
≥90%
Names and Identifiers
Pubchem Sid
Pubchem Sid Url
https://pubchem.ncbi.nlm.nih.gov/substance/508811606
Canonical Smiles
C[Si](C)(C)Br
IUPAC Name
bromo(trimethyl)silane
InChIKey
IYYIVELXUANFED-UHFFFAOYSA-N
INCHI
1S/C3H9BrSi/c1-5(2,3)4/h1-3H3
Isomeric SMILES
C[Si](C)(C)Br
WGK Germany
3
UN Number
2920
Packing Group
II
Molecular Weight
153.09
Beilstein
1731135
Reaxy-Rn
1731135
Reaxys-RN_link_address
https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=1731135&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganometallic compounds
ClassOrganometalloid compounds
SubclassOrganosilicon compounds
Intermediate Tree Nodes Organoheterosilanes
Direct ParentTrialkylheterosilanes
Alternative Parents Silyl monohalides  Organic metalloid salts  Alkylhalosilanes  Hydrocarbon derivatives  
Molecular FrameworkAliphatic acyclic compounds
Substituents Trialkylheterosilane - Silyl monohalide - Organic metalloid salt - Alkylhalosilane - Hydrocarbon derivative - Organic salt - Aliphatic acyclic compound
DescriptionThis compound belongs to the class of organic compounds known as trialkylheterosilanes. These are organoheterosilanes, bearing a silicon atom linked to three alkyl groups and one heteroatom.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

7 results found

Lot NumberCertificate TypeDateItem
J2130328Certificate of AnalysisAug 11, 2025 B140645
J2130329Certificate of AnalysisAug 11, 2025 B140645
K2101019Certificate of AnalysisAug 11, 2025 B140645
B2427262Certificate of AnalysisMar 01, 2023 B140645
D2312340Certificate of AnalysisMar 01, 2023 B140645
D2312341Certificate of AnalysisMar 01, 2023 B140645
D2312344Certificate of AnalysisMar 01, 2023 B140645
Chemical and Physical Properties
SolubilityMiscible with carbon tetrachloride, chloroform, dichloroethane, acetonitrile, toluene, dichloromethane and hexane.
SensitivityLight&Moisture Sensitive
Refractive Index1.424
Flash Point(°F)77 °F
Flash Point(°C)32 °C
Boil Point(°C)79°C
Melt Point(°C)-43°C
Molecular Weight153.090 g/mol
XLogP3
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count0
Rotatable Bond Count0
Exact Mass151.966 Da
Monoisotopic Mass151.966 Da
Topological Polar Surface Area0.000 Ų
Heavy Atom Count5
Formal Charge0
Complexity28.400
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Documents & Articles
Citations of This Product
Solution Calculators
Reviews

Customer Reviews

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