Trimethyl borate CAS:121-43-7 Biochemistry Chemical Reagent Intermediates Industrial Grade
ISO 15 Inquiries
121-43-7
Industrial Grade
99%
CHINA
REFORM CHEMICAL
200KG/drum
2026-07-16
Flavors & Fragrances,Catalyst & Auxiliary,Intermediates,Dyes & Pigments,Inorganic Chemistry,petro chemicals
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Product Description
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Seller Information
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Inquiry History
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DescriptionCertificatesBasic Info
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Product Name:
Trimethyl borate
Other Name:Boric acid (H3BO3),trimethyl ester;Methyl borate ((MeO)3B);Borester O;Trimethoxyborane;Trimethoxyborine;Trimethyl borate;Boric acid trimethyl ester;Trimethoxyboron;Boron trimethoxide;TMB;NSC 777;Trimethylborate;TMB-R;31649-91-9;63156-11-6
CAS No.:121-43-7
Molecular Formula:C3H9BO3
InChIKeys:InChIKey=WRECIMRULFAWHA-UHFFFAOYSA-N
Molecular Weight:103.91
Exact Mass:103.91
BRN:1697939
EC Number:204-468-9
UNII:82U64J6F5N
ICSC Number:0593
NSC Number:777
UN Number:2416
DSSTox ID:DTXSID0037738
Color/Form:Colorless, moisture-sensitive liquid; fumes in air
HScode:29209085
Categories:
Characteristics-
PSA:
27.7
XLogP3:-1.9
Appearance:Colorless Liquid
Density:0.915 g/cm3
Melting Point:-29.3 °C
Boiling Point:67-68 °C
Flash Point:8 °F
Refractive Index:n 20/D 1.358(lit.)
Water Solubility:Solubility in water: reaction.;Miscible with tetrahydrofuran, ether, isoporpylamine, hexane and methanol.
Storage Conditions:Flammables area
Vapor Pressure:Vapour pressure, kPa at 25°C: 18
Vapor Density:3.59 (vs air)
Toxicity:Oral-Rat LD50: 13000 mg/kg; Oral-Mouse LD50: 1290 mg/kg
Flammability characteristics:Inflammable in case of fire, high temperature and oxidant; produces toxic flammable boride gas in contact with water
Explosive limit:Reacts with oxidants causing fire and explosion hazard. /table/
Experimental Properties:Stable in the absence of moisture; hydrolyzes in the presence of water to methanol and boric acid. ... Forms azeotrope with methanol: 70% trimethyl borate and 30% methanol|Decomposes in water.|Dissolves in water with hydrolysis to form boric acid and the corresponding alcohol or phenol /Boric acid esters/
Air and Water Reactions:Highly flammable. Rapidly decomposes in water.
Reactive Group:Esters, Sulfate Esters, Phosphate Esters, Thiophosphate Esters, and Borate Esters
Reactivity Alerts:Highly Flammable
Reactivity Profile:Borates, such as TRIMETHYL BORATE, behave similarly to esters in that they react with acids to liberate heat along with alcohols and acids. Strong oxidizing acids may cause a vigorous reaction that is sufficiently exothermic to ignite the reaction products. Heat is also generated by the interaction of esters with caustic solutions. Flammable hydrogen is generated by mixing esters/borates with alkali metals and hydrides.
Physical Dangers:The vapour is heavier than air and may travel along the ground; distant ignition possible.
Hazard IdentificationClassification of the substance or mixture
Flammable liquids, Category 3
Acute toxicity - Category 4, Dermal
GHS label elements, including precautionary statements
Pictogram(s) 
Signal word Warning
Hazard statement(s) H226 Flammable liquid and vapour
H312 Harmful in contact with skin
Precautionary statement(s) Prevention P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.
P241 Use explosion-proof [electrical/ventilating/lighting/...] equipment.
P242 Use non-sparking tools.
P243 Take action to prevent static discharges.
P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...
Response P303+P361+P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse affected areas with water [or shower].
P370+P378 In case of fire: Use ... to extinguish.
P302+P352 IF ON SKIN: Wash with plenty of water/...
P317 Get medical help.
P321 Specific treatment (see ... on this label).
P362+P364 Take off contaminated clothing and wash it before reuse.
Storage P403+P235 Store in a well-ventilated place. Keep cool.
Disposal P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.
Other hazards which do not result in classification
no data available
Handling and StoragePrecautions for safe handling
NO open flames, NO sparks and NO smoking. Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling. Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.
Conditions for safe storage, including any incompatibilities
Fireproof. Separated from strong oxidants and strong acids. Dry.
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Seller Information
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Business Type:
Manufactory
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Main Products:
Flavors & Fragrances,Catalyst & Auxiliary,Intermediates,Dyes & Pigments,Inorganic Chemistry,petro chemicals
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Location:
17th Yuanlin Road ,Chongchuan area ,Nantong city ,Jiangsu province ,China
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Payment Terms:
L/C,100% TT in advance
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Average lead Time:
2
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Total Annual Revenue:
Above $100 million
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Total Employees:
201-300
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Year of Establishment:
2008
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Certifications:
GB/T19001-2016 / Iso9001:2015
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Inquiry History15 Inquiries
Country Product Purchase Quantity Date Posted 
India
Trimethyl Borate CAS No.: 121-43-7
1 20' Fcl Jun 10, 2025
India
Trimethyl borate
15.00 L Oct 28, 2024 
United States
Trimethyl borate
55 G May 7, 2024
India
Trimethyl borate
1 MT Nov 20, 2023
India
Trimethyl Borate
14 20' Fcl Apr 1, 2025 
Indonesia
Trimethyl borate
2000 L Sep 11, 2024 
Poland
Trimethyl borate
1000 KG Nov 22, 2023
India
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10.00 KG Oct 28, 2024
India
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7.50 KG Oct 28, 2024
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RuPhos
500.00 G Oct 28, 2024
India
(5-bromopent-1-ene )
5.00 KG Oct 28, 2024
India
BF3.Et2O
2.50 L Oct 28, 2024
India
DBU / 1,8-Diazabicyclo[5.4.0] undec-7-ene
2.50 KG Oct 28, 2024
India
PdCl2(dppf)2
350.00 G Oct 28, 2024
India
Phenyl triflimide
7.00 KG Oct 28, 2024 Post an enquiry for this product
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