C3H9BO3
103.92 g/mol
Industrial ChemicalDanger
TRIMETHYL BORATE
CAS121-43-7EC204-468-9
Category
Industrial Chemical
Compound Class
Ester
Primary Use
Flame retardant and welding flux
Trimethyl borate is a chemical compound used primarily as a flame retardant and welding flux. It also functions as a solvent for waxes, resins, and oils, and serves as an intermediate in chemical synthesis.
Flame retardantWelding and brazing fluxSolvent for waxes, resins, and oils
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ReferenceSame Category
Triethylamine
CAS121-44-8
Chemical intermediate and catalyst
ReferenceSame Category
Trimethyl phosphite
CAS121-45-9
Intermediate in pesticide manufacture
ReferenceSame Category
Sulfanilic acid
CAS121-57-3
Intermediate for dyes and organic chemicals
ReferenceSame Category
M-nitrobenzoyl chloride
CAS121-90-4
intermediate for dyes and pharmaceuticals
Safety Reference
Danger
H226Flammable liquid and vapour
H312Harmful in contact with skin
H225Highly flammable liquid and vapour
H301Toxic if swallowed
H311Toxic in contact with skin
H319Causes serious eye irritation
H331Toxic if inhaled
H360May damage fertility or the unborn child
H370Causes damage to organs
H302Harmful if swallowed
H335May cause respiratory irritation
Regulatory Compliance1
- CN Catalogue of Hazardous ChemicalsCNRegulation
Customs Tariff Classification
The international HS code for TRIMETHYL BORATE (CAS 121-43-7) is 2920.90.
HS code (international, 6-digit)
2920.90
EU CN code (8-digit)
2920 90 70
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
trimethyl borate
InChIKey
WRECIMRULFAWHA-UHFFFAOYSA-N
SMILES
B(OC)(OC)OC
Synonyms (28)
- (MeO)3B
- B(OMe)3
- BORON METHOXIDE
- Borester O
- Boric acid trimethyl ester
- Borsaeuretrimethylester
- Methyl borate
- Methyl borate, (MeO)3 B
- TRIMETHYL BORATE
- Trimethoxyborane
- Trimethoxyborine
- Trimethoxyboron
- Trimethyl borate-11B
- Trimethylborat
- trimethoxyboran
- trimethyborate
- trimethyl orthoborate
- trimethylboric acid
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