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TRIMETHYL BORATE

Boric acid trimethyl ester, Methyl borate

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Article No. 6366C Grade
Purity 98.5% CAS No. 121-43-7
Molecular Formula B(OCH3)3 Molecular Weight 103.91
H.S. Code 2920.9000 Shelf Life 60 Months

Physical Properties

Physical state at 20 °C Liquid Colour Colorless
Odour Pleasant Melting point/ Freezing point [°C] -34 °C - lit
Auto-ignition temperature [°C] 303 - 313 °C at 991 - 1.005 hPa Flash point [°C] -11°C
Boiling point [°C] 68 - 69 °C - lit. Vapour pressure [20°C] 147.9 - 148 hPa
Density [g/cm3] 0.932 g/cm3 at 20 °C - lit Solubility in water at 20 °C hydrolyses
Partition coefficient Log Pow octanol / water at 20°C log Pow: -1.09 at 22 °C

Specifications

Appearance Clear colorless liquid Infrared spectrum Conforms
Assay (by NaOH titration) Min 98.5% Refractive index (20°C; 589 nm) 1.3562 to 1.3582

Safety Information and Hazard Symbols

Skull and Crossbones Flame Health Hazard
Symbol: GHS02,GHS06,GHS08
 Signal Word: Danger
 UN No.: 2416
 IMCO Class No.: 3
 Packing Group: II
 Hazardous Statement: H225-H301+H331-H312-H319-H360FD-H370
 Precaution Statement: P210 - P280 - P301 + P310 - P303 + P361 + P353 - P304 + P340 + P311 - P305 + P351 + P338
Revision Date: 01-Dec-2025

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