Bromotrimethylsilane
- CAS No.
- 2857-97-8
- Chemical Name:
- Bromotrimethylsilane
- Synonyms
- TMSBR;TRIMETHYLSILYL BROMIDE;TRIMETHYLBROMOSILANE;TMBS;(CH3)3SiBr;Silane, bromotrimethyl-;Trimethylsilicon bromide;CT2928;TMS bromide;BromotrimethyL
- CBNumber:
- CB9749809
- Molecular Formula:
- C3H9BrSi
- Molecular Weight:
- 153.09
- MDL Number:
- MFCD00000048
- MOL File:
- 2857-97-8.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Product description | Number | Pack Size | Price |
| Bromotrimethylsilane for synthesis | 8.14324 | 10ml | $97.1 |
| Bromotrimethylsilane 97% | 194409 | 5g | $45.5 |
| Bromotrimethylsilane for synthesis | 8.14324 | 100mL | $317 |
| Bromotrimethylsilane 97% | 194409 | 25g | $113 |
| Bromotrimethylsilane >95.0%(GC) | B1087 | 5mL | $32 |
| More product size | |||
| Melting point | -43 °C |
|---|---|
| Boiling point | 79 °C(lit.) |
| Density | 1.16 g/mL at 25 °C(lit.) |
| refractive index |
n |
| Flash point | 90 °F |
| storage temp. | Store below +30°C. |
| solubility | DECOMPOSES |
| form | Liquid |
| Specific Gravity | 1.1725 |
| color | Clear colorless to yellow |
| Water Solubility | DECOMPOSES |
| Sensitive | Moisture Sensitive |
| Hydrolytic Sensitivity | 8: reacts rapidly with moisture, water, protic solvents |
| BRN | 1731135 |
| Stability | Stable. Flammable. Incompatible with strong acids, strong oxidizing agents. May decompose on exposure to water or moist air. |
| InChI | 1S/C3H9BrSi/c1-5(2,3)4/h1-3H3 |
| InChIKey | IYYIVELXUANFED-UHFFFAOYSA-N |
| SMILES | C[Si](C)(C)Br |
| CAS DataBase Reference | 2857-97-8(CAS DataBase Reference) |
| FDA UNII | JHH5G299BX |
| NIST Chemistry Reference | Bromotrimethylsilane(2857-97-8) |
| EPA Substance Registry System | Silane, bromotrimethyl- (2857-97-8) |
| UNSPSC Code | 12352103 |
| NACRES | NA.22 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |     GHS02,GHS05,GHS07,GHS09 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H225-H314-H335-H410 | |||||||||
| Precautionary statements | P210-P233-P273-P280-P303+P361+P353-P305+P351+P338 | |||||||||
| target organs | Respiratory system | |||||||||
| PPE | Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter | |||||||||
| Hazard Codes | C | |||||||||
| Risk Statements | 10-34-29-14 | |||||||||
| Safety Statements | 16-26-36/37/39-45-8 | |||||||||
| RIDADR | UN 2920 8/PG 2 | |||||||||
| WGK Germany | 3 | |||||||||
| F | 10-21 | |||||||||
| TSCA | TSCA listed | |||||||||
| HazardClass | 3 | |||||||||
| PackingGroup | II | |||||||||
| HS Code | 29310095 | |||||||||
| Storage Class | 3 - Flammable liquids | |||||||||
| Hazard Classifications | Aquatic Acute 1 Aquatic Chronic 1 Eye Dam. 1 Flam. Liq. 2 Skin Corr. 1B STOT SE 3 |
|||||||||
| REACH Registrations | Active | |||||||||
| Limited Quantities | 1.0 L (0.3 gallon) (liquid) | |||||||||
| Excepted Quantities | Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml) | |||||||||
| NFPA 704 |
|
Bromotrimethylsilane price More Price(63)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 8.14324 | Bromotrimethylsilane for synthesis | 2857-97-8 | 10ml | $97.1 | 2026-04-30 | Buy |
| Sigma-Aldrich | 194409 | Bromotrimethylsilane 97% | 2857-97-8 | 5g | $45.5 | 2026-04-30 | Buy |
| Sigma-Aldrich | 8.14324 | Bromotrimethylsilane for synthesis | 2857-97-8 | 100mL | $317 | 2026-04-30 | Buy |
| Sigma-Aldrich | 194409 | Bromotrimethylsilane 97% | 2857-97-8 | 25g | $113 | 2026-04-30 | Buy |
| TCI Chemical | B1087 | Bromotrimethylsilane >95.0%(GC) | 2857-97-8 | 5mL | $32 | 2026-04-30 | Buy |
Bromotrimethylsilane Chemical Properties,Uses,Production
Uses
Bromotrimethylsilane can protect or deprotect functional groups selectively, act as silane blocking agent, which is widely used in the syntheses of drugs.
Chemical Properties
Clear yellow liquid
Physical properties
bp 79°C; d 1.188 g cm3; n20 D 1.4240; fp 32°C.
Uses
Bromotrimethylsilane is a mild and selective reagent for cleavage of lactones, epoxides,
acetals, phosphonate esters and certain ethers; effective reagent
for formation of silyl enol ethers; can function as brominating
agent.
Amines react with TMS-Br to form
isolable adducts, which react readily with ketones to form enamines
under mild conditions (eq 15).
Uses
Adefovir intermediate
Uses
Powerful silylating agent
Preparation
although many methods are reported, only a few are provided here: chlorotrimethylsilane undergoes halogen exchange with either magnesium bromide in Et2O or sodium bromide in MeCN, which allows in situ reagent formation (eq 1); alternatively, hexamethyldisilane reacts with bromine in benzene solution or neat, to afford only TMS-Br with no byproducts (eq 2).4 TMS-Br may also be generated by reaction of hexamethyldisiloxane and aluminum bromide (eq 3).However, it should be noted that the reactivity of in situ generated reagent appears to depend upon the method of preparation.
General Description
Bromotrimethylsilane is used with Cl3 to catalyze the direct allylation of a variety of alcohols with allyltrimethylsilane.
Purification Methods
Purify it by repeated fractional distillation and store it in sealed ampoules in the dark. [McCusker & Reilly J Am Chem Soc 75 1583 1953.] Also fractionate it through a 15-plate column (0.8 x 32cm packed with 1/16in single turn helices of Pt-Ir wire). [Gilliam et al. J Am Chem Soc 68 1161 1946, Pray et al. J Am Chem Soc 70 433 1948, Beilstein 4 IV 4008.]
Bromotrimethylsilane Preparation Products And Raw materials
Raw materials
Preparation Products
1of2
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Hebei Chuanghai Biotechnology Co., Ltd | +86-15350571055 | Sibel@chuanghaibio.com | China | 8737 | 58 |
| Hebei Dangtong Import and export Co LTD | +86-86-4001020630 +86-13910575315 | admin@hbdangtong.com | China | 996 | 58 |
| Hubei Changfu Chemical Co., Ltd. | +86-02784396550 +86-17721064038 | sales@cfsilanes.com | China | 481 | 58 |
| HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD | +86-15350851019; +86-15383190639 | admin@86-ss.com | China | 996 | 58 |
| Capot Chemical Co.,Ltd. | +86-（0）57185586718 +86-13336195806 | sales@capot.com | China | 29626 | 60 |
| Shanghai Daken Advanced Materials Co.,Ltd | +86-2158073036 | info@dakenam.com | China | 14034 | 58 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21531 | 55 |
| Shanghai Time Chemicals CO., Ltd. | +86-021-57951555 +8618017249410 | jack.li@time-chemicals.com | China | 1796 | 55 |
| Nanjing ChemLin Chemical Industry Co., Ltd. | 025-83697070 | product@chemlin.com.cn | CHINA | 3004 | 60 |
| Shanghai Yingrui Biopharma Co., Ltd. | +86-21-33585366 - 03@ | sales03@shyrchem.com | CHINA | 736 | 60 |
View Lastest Price from Bromotrimethylsilane manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-08-17 | Trimethylbromosilane
2857-97-8
|
1kg | 98 | 20 tons | Hubei Changfu Chemical Co., Ltd. | ||
 |
2026-08-17 | Bromotrimethylsilane
2857-97-8
|
$700.00-1000.00 | 1ton | 99% | 5000 | HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD | |
 |
2026-07-06 | Bromotrimethylsilane
2857-97-8
|
1kg | 98% | 1000kg | Shaanxi Dideu New Materials Co. Ltd |
-
- Trimethylbromosilane
2857-97-8
- $0.00
- 98
- Hubei Changfu Chemical Co., Ltd.
-
- Bromotrimethylsilane
2857-97-8
- $700.00-1000.00
- 99%
- HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD
-
- Bromotrimethylsilane
2857-97-8
- 98%
- Shaanxi Dideu New Materials Co. Ltd
