HomeProducts

Bromotrimethylsilane

CAS Number
2857-97-8
EC Number
220-672-0
Chemical Formula
C3H9BrSi
Molecular Weight
153.09 g/mol

Description

Bromotrimethylsilane ( CAS 2857-97-8 ), commonly abbreviated as TMSBr, is a reactive organosilicon reagent used across pharmaceutical synthesis and specialty chemical manufacturing. It functions primarily as a silylating agent and Lewis acid activator. This versatile compound enables selective protection and deprotection of functional groups in complex molecule construction. In pharmaceutical API synthesis, TMSBr converts phosphonate esters to phosphonic acids for drug manufacturing. This specific transformation is central to antiviral and nucleotide analog drug manufacturing processes. Polymer chemists use it to introduce trimethylsilyl groups onto polymer backbones, modifying surface adhesion and compatibility. These modifications are essential for specialty coatings and adhesives used in industrial applications. In fine chemical and agrochemical synthesis, it activates esters and ethers under mild conditions, reducing harsh catalysts. Cosmetic and personal care formulators apply it in silicone-based systems where controlled surface modification is required. TMSBr is supplied as a liquid, typically at high purity levels of 97% or greater. Anhydrous grades are standard given the compound's sensitivity to moisture. Packaging ranges from small reagent quantities to multi-kilogram drums for industrial synthesis to meet various production demands. Technical and synthesis-grade specifications are the most commonly available across the market. The reagent remains a critical component for laboratories focusing on advanced organic synthesis and material science. Contact us for supply of Bromotrimethylsilane Request Quote

Other Names (Synonyms)

Trimethylsilyl bromide | Silane, bromotrimethyl- | tmsbr | JHH5G299BX | RefChem:121650 | Trimethylsilicon bromide

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point-44 °C
Boiling Point80 °C
Density1.172 g/cm³
Flash Point90 °F
AppearanceClear yellow liquid
ColorClear colorless to yellow
FormLiquid
Water SolubilityDECOMPOSES
Refractive Indexn 20/D 1.424(lit.)

Safety & Handling

Danger
GHS02· FlammableGHS05· Corrosive

Hazard Statements

H225Highly Flammable liquid and vapor
H226Flammable liquid and vapor
H314Causes severe skin burns and eye damage

Precautionary Statements

P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233Keep container tightly closed.
P240Ground and bond container and receiving equipment.
P241Use explosion-proof equipment.
P242Use non-sparking tools.
P243Take action to prevent static discharges.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P316Get emergency medical help immediately.
P321Specific treatment (see … on this label).
P363Wash contaminated clothing before reuse.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P378Use … for extinction.
P235Store in a well-ventilated place. Keep cool.
P331Rinse mouth. Do NOT induce vomiting.
P354IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower.
P353IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29310095
UN Number2920
ADR Class8
Packing GroupII
Storage Class3 - Flammable liquids
WGK (Germany)3