4325-85-3

Basic information

• Product Name: TRIS(TRIMETHYLSILOXY)BORON
• Synonyms: trimethyl-silanotriesterwithboricacid(h3bo3);Boric acid tris(trimethylsilyl) ester~Tris(trimethylsiloxy)boron;TRIS(TRIMETHYLSILYL) BORATE 99%;TRIS(TRIMETHYLSILOXY)BORON 97+%;Tris(trimethylsilyl)borate(Tris(trimethylsiloxy)boron);Tris(trimethylsiloxy)boron,min.97%;Tris(trimethylsiloxy)boron, min. 97%;Tris(trimethylsiloxy)boron ,96%
• CAS NO: 4325-85-3
• Molecular Formula: C₉H₂₇BO₃Si₃
• Molecular Weight: 278.38
• EINECS: -0
• Product Categories: B (Classes of Boron Compounds);Boric Acid Esters;Boric Acid Triesters;Boronic Acids and Derivatives;Organoborates;Organometallic Reagents;borate ester
• Mol File: 4325-85-3.mol
• Article Data: 5

Chemical Properties

• Melting Point: -35°C
• Boiling Point: 186 °C(lit.)
• Flash Point: 109 °F
• Appearance: Clear colorless/Liquid
• Density: 0.831 g/mL at 25 °C(lit.)
• Vapor Pressure: 0.931mmHg at 25°C
• Refractive Index: n20/D 1.386(lit.)
• Storage Temp.: Flammables area
• Sensitive: Moisture Sensitive
• BRN: 1772733
• CAS DataBase Reference: TRIS(TRIMETHYLSILOXY)BORON(CAS DataBase Reference)
• NIST Chemistry Reference: TRIS(TRIMETHYLSILOXY)BORON(4325-85-3)
• EPA Substance Registry System: TRIS(TRIMETHYLSILOXY)BORON(4325-85-3)

Safety Data

• Hazard Codes: Xi
• Statements: 10-36/37/38
• Safety Statements: 26-36
• RIDADR: UN 1993 3/PG 3
• WGK Germany: 3
• F: 10-21
• TSCA: Yes
• HazardClass: 3
• PackingGroup: III
• Hazardous Substances Data: 4325-85-3(Hazardous Substances Data)

Usage

Chemical Properties

Clear colorless liquid

Uses

Tris(trimethylsilyl) borate is used as intermediate of organic synthesis and additive of lithium battery electrolyte.

InChI:InChI=1/C9H27BO3Si3/c1-14(2,3)11-10(12-15(4,5)6)13-16(7,8)9/h1-9H3

Upstream product

• 75-77-4 chloro-trimethyl-silane 
• 1825-62-3 ethyl trimethylsilyl ether 
• 107-46-0 Hexamethyldisiloxane 
• 369-57-3 benzenediazonium tetrafluoroborate 
• 2754-27-0 trimethylsilyl acetate 
• 11113-50-1 boric acid 
• 67-63-0 isopropyl alcohol 
• 23111-05-9 trimethylacetoxysilane 
• 999-97-3 1,1,1,3,3,3-hexamethyl-disilazane 
• 996-50-9 N,N-diethyl-1,1,1-trimethylsilanamine 

Downstream Products

• 11113-50-1 boric acid 
• 18306-29-1 bis(trimethylsilyl)sulphate 
• 4887-24-5 triacetoxyborane 
• 17905-96-3 tris(trimethylsilyloxy)boroxine 
• 244761-29-3 lithium bis[1,2-oxalato^(2-)-O,O'] borate 
• 2754-27-0 trimethylsilyl acetate 

Relevant articles and documents

Synthesis of high-purity tris(trimethylsilyl) borate

A method was developed for synthesis of high-purity tris(trimethylsilyl) borate by reaction of trimethylacetoxysilane with powdered boric acid. Nauka/Interperiodica 2006.

Catalyseurs pour la transformation de polydimethylsilanes en polycarbosilanes

The conversion of polydimethylsilanes into the corresponding polycarbosilanes has been studied using liquid monomeric catalysts such as B(OR)3 (R = Me, Pr, SiMe3) or the B-N bonded compounds: Me2BN(SiMe3)2 and B(NEt2)3.Using this route it is possible to obtain polycarbosilanes which are more stable than the Mark III synthesized by the Yajima route and have a smaller polydispersity.These precursors obtained at 380-400 deg C do not require the use of an autoclave.

Three (trimethyl silicon-based) borate synthesis method

The invention discloses a synthesis method of boric acid tris(trimethylsilyl)ester, wherein the synthesis method comprises the steps: mixing boric acid and hexamethyldisilazane, then adding a catalyst sulfonic acid type cation dry hydrogen resin, next heating up to 60-80 DEG C, vacuumizing in a reaction process, adsorbing ammonia gas generated in the reaction, after the reaction is finished, cooling, filtering, and thus obtaining a filtrate boric acid tris(trimethylsilyl)ester crude product and a filter residue; and then carrying out reduced pressure rectification on the filtrate, and collecting a fraction to obtain the high-purity boric acid tris(trimethylsilyl)ester. The synthesis method simplifies the technological process of synthesis and rectification operations, the catalyst can be reused, the product yield reaches more than 85%, and the production cost is reduced.