Trimethyl borate

Modify Date: 2025-08-21 10:24:41

Trimethyl borate Structure
Trimethyl borate structure
Common Name Trimethyl borate
CAS Number 121-43-7 Molecular Weight 103.913
Density 0.9±0.1 g/cm3 Boiling Point 67.5±0.0 °C at 760 mmHg
Molecular Formula C3H9BO3 Melting Point -34 °C
MSDS USA Flash Point -8.3±0.0 °C
Symbol GHS02 GHS07 GHS08
GHS02, GHS07, GHS08
Signal Word Danger

 Names

Name trimethyl borate
Synonym More Synonyms

 Chemical & Physical Properties

Density 0.9±0.1 g/cm3
Boiling Point 67.5±0.0 °C at 760 mmHg
Melting Point -34 °C
Molecular Formula C3H9BO3
Molecular Weight 103.913
Flash Point -8.3±0.0 °C
Exact Mass 104.064476
PSA 27.69000
LogP 1.45
Vapour density 3.59 (vs air)
Vapour Pressure 157.1±0.1 mmHg at 25°C
Index of Refraction 1.335
Stability Stable. Incompatible with oxidizing agents. Decomposes slowly in the presence of moisture, rapidly in water. Flammable.
Water Solubility reacts

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
ED5600000
CHEMICAL NAME :
Boric acid, trimethyl ester
CAS REGISTRY NUMBER :
121-43-7
BEILSTEIN REFERENCE NO. :
1697939
LAST UPDATED :
199710
DATA ITEMS CITED :
12
MOLECULAR FORMULA :
C3-H9-B-O3
MOLECULAR WEIGHT :
103.93
WISWESSER LINE NOTATION :
1OBO1&O1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
Standard Draize test
ROUTE OF EXPOSURE :
Administration into the eye
SPECIES OBSERVED :
Rodent - rabbit
REFERENCE :
AJOPAA American Journal of Ophthalmology. (Ophthalmic Pub. Co., 435 N. Michigan Ave., Suite 1415, Chicago, IL 60611) Series 3: V.1- 1918- Volume(issue)/page/year: 29,1363,1946 ** ACUTE TOXICITY DATA **
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
6140 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
14KTAK "Boron, Metallo-Boron Compounds and Boranes," Adams, R.M., ed., New York, John Wiley & Sons, Inc., 1964 Volume(issue)/page/year: -,693,1964
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
1600 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
14KTAK "Boron, Metallo-Boron Compounds and Boranes," Adams, R.M., ed., New York, John Wiley & Sons, Inc., 1964 Volume(issue)/page/year: -,693,1964
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
1290 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
14KTAK "Boron, Metallo-Boron Compounds and Boranes," Adams, R.M., ed., New York, John Wiley & Sons, Inc., 1964 Volume(issue)/page/year: -,693,1964
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
1 gm/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
14KTAK "Boron, Metallo-Boron Compounds and Boranes," Adams, R.M., ed., New York, John Wiley & Sons, Inc., 1964 Volume(issue)/page/year: -,693,1964
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Administration onto the skin
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
1980 uL/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
AIHAAP American Industrial Hygiene Association Journal. (AIHA, 475 Wolf Ledges Pkwy., Akron, OH 44311) V.19- 1958- Volume(issue)/page/year: 23,95,1962
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
1600 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
14KTAK "Boron, Metallo-Boron Compounds and Boranes," Adams, R.M., ed., New York, John Wiley & Sons, Inc., 1964 Volume(issue)/page/year: -,693,1964 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 74430 No. of Facilities: 50 (estimated) No. of Industries: 3 No. of Occupations: 4 No. of Employees: 1090 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 74430 No. of Facilities: 192 (estimated) No. of Industries: 7 No. of Occupations: 7 No. of Employees: 4878 (estimated) No. of Female Employees: 369 (estimated)

 Safety Information

Symbol GHS02 GHS07 GHS08
GHS02, GHS07, GHS08
Signal Word Danger
Hazard Statements H225-H312-H319-H360FD-H370
Precautionary Statements P201-P210-P260-P302 + P352 + P312-P308 + P311-P337 + P313
Target Organs Central nervous system, Eyes
Personal Protective Equipment Eyeshields;Faceshields;full-face respirator (US);Gloves;multi-purpose combination respirator cartridge (US);type ABEK (EN14387) respirator filter
Hazard Codes F:Flammable;Xn:Harmful;
Risk Phrases R11;R21
Safety Phrases S16-S27-S36/37/39-S45-S25-S23-S2
RIDADR UN 2416 3/PG 2
WGK Germany 3
RTECS ED5600000
Packaging Group II
Hazard Class 3
HS Code 2920909090

 Synthetic Route

 Customs

HS Code 2920909090
Summary 2920909090 esters of other inorganic acids of non-metals (excluding esters of hydrogen halides) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0%

 Articles8

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 Synonyms

Trimthyl borate
BORON METHOXIDE
EINECS 204-468-9
Methyl Borate
B(OCH3)3
TRIMETHYL BORATE FOR SYNTHESIS
Trimethyl borate
boric acid trimethyl ester
trimethyl boronate
Boric acid (HBO), trimethyl ester
trimethyl
trimethoxyborane
THALLIUM HYDROTRIS[3-(2-PYRIDYL)PYRAZOL-1-YL]BORATE
Trimethylborate
Borester O
Boric acid trimethyl ester,Methyl borate
Trimethoxyboron
C3H9BO3
MFCD00008346
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