English Safety Data Sheet Database 中文版 MSDS

Trimethylborane

CAS No. 593-90-8 | PubChem CID 68979
Section 1. Identification
Chemical NameTrimethylborane CAS No.593-90-8
Synonymstrimethylboron Chinese Name三甲基硼
Molecular FormulaC3HgB Molecular Weight55.915
UN No.3160 Data SourcePubChem (NIH/NLM)
GHS Hazard Classification
Signal Word DANGER
Pictograms GHS02 · Flammable GHS04 · Compressed Gas GHS05 · Corrosive
Hazard Statements H220H250H280H314
Precautionary Statements P203P210P222P231P233P260P264P280P301+P330+P331P302+P335+P334P302+P361+P354P304+P340P305+P354+P338P316P321P363P370+P378P377P381P403P405P410+P403P501

Section 2. Hazards Identification

H220 (52.7%): Extremely flammable gas [Danger Flammable gases]

H250 (17.1%): Catches fire spontaneously if exposed to air [Danger Pyrophoric liquids]

H280 (82.9%): Contains gas under pressure; may explode if heated [Warning Gases under pressure]

H314 (100%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]

P203, P210, P222, P231, P233, P260, P264, P280, P301+P330+P331, P302+P335+P334, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P363, P370+P378, P377, P381, P403, P405, P410+P403, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 129 reports by companies from 6 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.

Section 8. Exposure Controls / Personal Protection

TIH (Toxic Inhalation Hazard) - Term used to describe gases and volatile liquids that are toxic when inhaled. Some are TIH materials themselves, e.g., chlorine, and some release TIH gases when spilled in water, e.g., chlorosilanes. [ERG 2016].

Section 9. Physical and Chemical Properties

Colorless gas with a repulsive odor; [Matheson Tri-Gas MSDS]

Metals -> Metalloid Compounds (Boron)

Section 11. Toxicological Information

Dermatotoxin - Skin burns.

Toxic Pneumonitis - Inflammation of the lungs induced by inhalation of metal fumes or toxic gases and vapors.

Source: PubChem CID 68979 (NIH/NLM, public domain). Retrieved from PubChem, a public-domain chemistry database maintained by the U.S. National Library of Medicine. Last updated: 2026-08-02 09:55:01.
Disclaimer: This information is compiled for reference only and does not replace the manufacturer's official Safety Data Sheet. Always consult the supplier's SDS before handling any chemical.