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Trimethyl borate

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Trimethyl borate Basic information

Product Name:
Trimethyl borate
CAS:
121-43-7
MF:
C3H9BO3
MW:
103.91
EINECS:
204-468-9
Mol File:
121-43-7.mol
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Trimethyl borate Chemical Properties

Melting point:
-34 °C
Boiling point:
68-69 °C(lit.)
Density 
0.932 g/mL at 20 °C(lit.)
vapor density 
3.59 (vs air)
refractive index 
n20/D 1.358(lit.)
Flash point:
8 °F
storage temp. 
Flammables area
solubility 
Miscible with tetrahydrofuran, ether, isoporpylamine, hexane and methanol.
form 
Liquid
color 
Colorless
Specific Gravity
0.883
Specific Gravity
0.915
Water Solubility 
reacts
Sensitive 
Moisture Sensitive
Hydrolytic Sensitivity
7: reacts slowly with moisture/water
Merck 
14,9712
BRN 
1697939
Stability:
Stable. Incompatible with oxidizing agents. Decomposes slowly in the presence of moisture, rapidly in water. Flammable.
InChIKey
WRECIMRULFAWHA-UHFFFAOYSA-N
CAS DataBase Reference
121-43-7(CAS DataBase Reference)
NIST Chemistry Reference
Boric acid, trimethyl ester(121-43-7)
EPA Substance Registry System
Boric acid (H3BO3), trimethyl ester (121-43-7)
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Safety Information

Hazard Codes 
Xn,F,T
Risk Statements 
11-21-23/25-36/37/38-10-36-61-60
Safety Statements 
16-27-36/37/39-45-25-23-2-26-53
RIDADR 
UN 2416 3/PG 2
WGK Germany 
3
RTECS 
ED5600000
21
TSCA 
Yes
HazardClass 
3
PackingGroup 
II
HS Code 
29209085
Hazardous Substances Data
121-43-7(Hazardous Substances Data)
Toxicity
LD50 orally in rats: 6.14 ml/kg (Smyth)

MSDS

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Trimethyl borate Usage And Synthesis

Chemical Properties

Water-white liquid. Miscible with ether, methanol, hexane, tetrahydrofuran; decomposes in presence of water.

Uses

As solvent for waxes, resins, oils; catalyst in the manufacture of ketones; analysis of paint and varnish ingredients; as neutron detector gas in the presence of a scintillation counter; as a promoter of diborane reactions.

Definition

ChEBI: A member of the class of borate esters obtained by the formal condensation of three equivalents of methanol with boric acid.

General Description

A water-white liquid. Denser than water. Flash point 80°F. Vapors heavier than air. Used as a solvent and fungicide for fruit.

Air & Water Reactions

Highly flammable. Rapidly decomposes in water.

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.

Health Hazard

May cause toxic effects if inhaled or absorbed through skin. Inhalation or contact with material may irritate or burn skin and eyes. Fire will produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.

Fire Hazard

HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.

Safety Profile

Moderately toxic by ingestion, skin contact, and intraperitoneal routes. An eye irritant. A very dangerous fire hazard when exposed to heat, flame, or oxidizers. Moderately explosive when exposed to flame. Will react with water or steam to produce toxic and flammable vapors. To fight fire, use dry chemical, CO2, spray, foam. When heated to decomposition it emits acrid smoke and irritating fumes. See also ESTERS and BORON COMPOUNDS.

Purification Methods

Carefully fractionate the borate through a gauze-packed column. Re-distil and collect it in weighed glass vials and seal them. Keep it away from moisture. It undergoes alkyl exchange with alcohols and forms azeotropes, e.g. with MeOH the azeotrope consists of 70% (MeO)3B and 30% MeOH with b 52-54o/760mm, d 0.87. [Charnley et al. J Chem Soc 2288 1952, Gerrard & Lappert Chem Ind (London) 53 1952, Schlesinger et al. J Am Chem Soc 75 213 1953.] It has also been dried with Na and then distilled. [Beilstein 1 IV 1269.]

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Trimethyl borateSupplierMore

Jiangsu hongzi new energy technology co. LTD Gold
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15962706877
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hongzhihuagong@126.com
Wuhan Greatwall chemical Co,.LTD Gold
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18086000087 027-86647488
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sales@chemgreatwall.com
Zhangjiagang Aixin Chemical Co.,Ltd. Gold
Tel:
13915703810 0512-58583037
Email:
sales@aixinchem.com
Shanghai Song Yuan Chemical Technology Co., Ltd. Gold
Tel:
18521000990 010-1234567
Email:
sonyuanchemical@163.com
J & K SCIENTIFIC LTD.
Tel:
400-666-7788 010-82848833-
Email:
jkinfo@jkchemical.com;market6@jkchemical.com
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