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High-purity wet process chemicals

Trimethylborane

Also known as Trimethylboron, Borane, trimethyl-, TRIMETHYLBORON-D9, Trimethylborondelecgrcolorlessgas, TRIMETHYLBORON-D9, 99 ATOM % D, ELECTRON, 99atom%delectronicgrade, Deuterated Trimethylboron

CAS 593-90-8Formula C3H9BMolar mass 55.92 g/molEC 209-816-3
GHS signal word: Danger. Pictograms: Flammable, Gas under pressure, Corrosive 1 supplier listed
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Trimethylborane chemical structure, C3H9B, CAS 593-90-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
593-90-8
Formula
C3H9B
Molar mass
55.92 g/mol
Physical form
Gas
HS code
293190
Category
High-purity wet process chemicals
Illustrative photo, a gas cylinder on a trolley on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Trimethylborane?

Plain description, key identifiers and synonyms

Trimethylborane is a chemical substance with the molecular formula C3H9B and a molar mass of 55.92 g/mol. Its CAS registry number is 593-90-8.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
trimethylborane
CAS number
593-90-8 CAS number cross-checked
EC number
209-816-3
Molecular formula
C3H9B
MDL number
MFCD00058727
InChIKey
WXRGABKACDFXMG-UHFFFAOYSA-N
InChI
InChI=1S/C3H9B/c1-4(2)3/h1-3H3
SMILES (canonical and isomeric)
B(C)(C)C

Synonyms

  • Trimethylboron
  • Borane, trimethyl-
  • TRIMETHYLBORON-D9, Trimethylborondelecgrcolorlessgas, TRIMETHYLBORON-D9, 99 ATOM % D, ELECTRON, 99atom%delectronicgrade, Deuterated Trimethylboron
  • Trimethylboron, elec. gr.
  • (CH3)3B
  • Trimethylboron, electronic grade, >=98.35%

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Physical form
Gasexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
55.92 g/molcalc.
Exact mass
56.0797 Dacalc.
LogP (octanol/water)
1.37calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
4calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS04: Gas under pressure
Gas under pressure
GHS05: Corrosive
Corrosive

Hazard statements

  • H220Extremely flammable gas.
  • H250Catches fire spontaneously if exposed to air.
  • H280Contains gas under pressure, may explode if heated.
  • H314Causes severe skin burns and eye damage.
Precautionary statements (23)
  • P203Obtain, read and follow all safety instructions before use.
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P222Do not allow contact with air.
  • P231Handle and store contents under inert gas.
  • P233Keep container tightly closed.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P335 + P334If on skin: Brush off loose particles from skin. Immerse in cool water or wrap in wet bandages.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P363Wash contaminated clothing before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P377Leaking gas fire: do not extinguish, unless leak can be stopped safely.
  • P381In case of leakage, eliminate all ignition sources.
  • P403Store in a well-ventilated place.
  • P405Store locked up.
  • P410 + P403Protect from sunlight. Store in a well-ventilated place.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Trimethylborane suppliers

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Where suppliers are based

1 supplier in 1 country

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Trimethylborane price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Trimethylborane is traded under.

HS 2931.90Indicative HS code

Organo-inorganic compounds, other than tetramethyl lead, tetraethyl lead, tributyltin compounds…

World exports in 2024
$3.97B
+5.3% vs 2023, imports $3.93B
2019 to 2024
Top exporters
  1. China28.3%
  2. United States15.6%
  3. Germany15.1%
Top importers
  1. United States14.6%
  2. China13.0%
  3. South Korea8.5%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Trimethylborane is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Trimethylborane, based on the data on this page

What is Trimethylborane?

Trimethylborane is a chemical substance with the molecular formula C3H9B and a molar mass of 55.92 g/mol. Its CAS registry number is 593-90-8.

What is the CAS number of Trimethylborane?

The CAS registry number of Trimethylborane is 593-90-8.

What is the molecular formula and weight of Trimethylborane?

The molecular formula of Trimethylborane is C3H9B and its molar mass is 55.92 g/mol.

What is Trimethylborane used for?

Known uses and roles of Trimethylborane include high-purity wet chemicals in electronics and semiconductors.

Is Trimethylborane hazardous?

Trimethylborane carries the GHS signal word "Danger". Main hazards: extremely flammable gas, catches fire spontaneously if exposed to air, contains gas under pressure, may explode if heated. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Trimethylborane?

Trimethylborane is usually classified under HS code 293190 (X. ORGANO-INORGANIC COMPOUNDS, HETEROCYCLIC COMPOUNDS, NUCLEIC ACIDS AND THEIR SALTS…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Trimethylborane?

CompoundList lists 1 supplier of Trimethylborane in Japan. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Trimethylborane?

Suppliers quote Trimethylborane on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Trimethylborane

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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