935638

Tris(trimethylsilyl) phosphate

≥99.0%, anhydrous, battery grade

• Synonym(s): Phosphoric acid tris(trimethylsilyl ester), TMSP, TMSPA
• Linear Formula: [(CH₃)₃SiO]₃P(O)
• CAS Number: 10497-05-9
• Molecular Weight: 314.54
• Beilstein/REAXYS Number: 1794624
• MDL number: MFCD00008267
• UNSPSC Code: 12352005

Properties

• grade: battery grade
• Quality Level: 100
• description: Application: Battery manufacturing
• assay: ≥99.0%
• form: (colorless liquid)
• greener alternative product characteristics: Design for Energy Efficiency; Learn more about the Principles of Green Chemistry.
• sustainability: Greener Alternative Product
• impurities: ppm H2O≤500; ≤500 ppm H₂O
• refractive index: n20/D 1.409 (lit.)
• bp: 228-229 °C/720 mmHg (lit.); 228-229 °C
• mp: 3-4 °C (lit.); 3-4 °C
• density: 0.945 g/mL at 25 °C (lit.)
• application(s): battery manufacturing
• greener alternative category: Enabling
• SMILES string: C[Si](C)(C)OP(=O)(O[Si](C)(C)C)O[Si](C)(C)C
• InChI: 1S/C9H27O4PSi3/c1-15(2,3)11-14(10,12-16(4,5)6)13-17(7,8)9/h1-9H3
• InChI key: QJMMCGKXBZVAEI-UHFFFAOYSA-N

Description

General description

Tris(trimethylsilyl) borate (TMSB) is an electron-deficient organoborate compound. It is a colorless liquid that that is miscible with many organic solvents, including the linear and cyclic carbonates used in battery applications. Our battery grade TMSB is differentiated by its high purity and low trace water content to ensure consistent and reliable performance in batteries.

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Application

Tris(trimethylsilyl) borate has a wide range of applications in various industries, including battery manufacturing, where it is used as an electrolyte additive, particularly in high-voltage lithium-ion batteries. TMSB is a cathode-film-forming additive that forms a thin protective coating called a solid-electrolyte interface (SEI) on the surface of the cathode. Adding TMSB to the electrolyte formulation, even at low concentrations of 0.5 wt.%, noticeably improves capacity retention for NMC, LMO, and LMNO cathodes. TMSB also is shown to reduce the flammability of the electrolyte and improve the thermal stability of LiPF₆-based electrolytes at elevated temperatures.TMSB also has catalytic properties, which make it useful in organic synthesis reactions and as a reagent in the manufacturing of pharmaceuticals and other chemicals.

Safety Information

• pictograms: GHS02,GHS07
• signalword: Danger
• hcodes: H225,H315,H319,H335
• pcodes: P210 - P233 - P240 - P241 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Eye Irrit. 2 - Flam. Liq. 2 - Skin Irrit. 2 - STOT SE 3
• target_organs: Respiratory system
• Storage Class: 3 - Flammable liquids
• wgk_germany: WGK 2
• flash_point_f: 55.4 °F - closed cup
• flash_point_c: 13 °C - closed cup