Bromomethane; Methyl bromide

CAS 74-83-9 CH₃Br MW 95.0000 Danger NIOSH data available

NIOSH Potential Occupational Carcinogen

Flame

Gas Cylinder

Corrosion

Skull and Crossbones

Exclamation Mark

Health Hazard

Environment

Emergency: 911 | Poison Control: 1-800-222-1222

Recommended safety equipment

Personal protective equipment commonly recommended for the hazard classes shown above.

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Hazard Statements

Code	Statement	Hazard Class
`H220`	Extremely flammable gas	Flammable gases
`H301`	Toxic if swallowed	Acute toxicity, oral
`H314`	Causes severe skin burns and eye damage	Skin corrosion/irritation
`H318`	Causes serious eye damage	Serious eye damage/eye irritation
`H331`	Toxic if inhaled	Acute toxicity, inhalation
`H341`	Suspected of causing genetic defects	Germ cell mutagenicity
`H370`	Causes damage to organs	Specific target organ toxicity, single exposure
`H372`	Causes damage to organs through prolonged or repeated exposure	Specific target organ toxicity, repeated exposure
`H401`	Toxic to aquatic life	Hazardous to the aquatic environment, acute hazard
`H411`	Toxic to aquatic life with long lasting effects	Hazardous to the aquatic environment, long-term hazard
`H420`	Harms public health and the environment by destroying ozone in the upper atmosphere	Hazardous to the ozone layer

Precautionary Statements

Code	Statement
`P203`	Obtain, read and follow all safety instructions before use.
`P210`	Keep away from heat, hot surface, sparks, open flames and other ignition sources. No smoking.
`P222`	Do not allow contact with air.
`P260`	Do not breathe dust/fume/gas/mist/vapors/spray.
`P261`	Avoid breathing dust/fume/gas/mist/vapors/spray.
`P264`	Wash hands [and ...] thoroughly after handling.
`P264+P265`	Wash hands [and ...] thoroughly after handling. Do not touch eyes.
`P270`	Do not eat, drink or smoke when using this product.
`P271`	Use only outdoors or in a well-ventilated area.
`P273`	Avoid release to the environment.
`P280`	Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...
`P301+P316`	IF SWALLOWED: Get emergency medical help immediately.
`P301+P330+P331`	IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
`P302+P361+P354`	IF ON SKIN: Take off Immediately all contaminated clothing. Immediately rinse with water for several minutes.
`P304+P340`	IF INHALED: Remove person to fresh air and keep comfortable for breathing.
`P305+P354+P338`	IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing.
`P308+P316`	IF exposed or concerned: Get emergency medical help immediately.
`P316`	Get emergency medical help immediately.
`P317`	Get emergency medical help.
`P318`	if exposed or concerned, get medical advice.
`P319`	Get medical help if you feel unwell.
`P321`	Specific treatment (see information on this label and safety datasheet)).
`P330`	Rinse mouth.
`P363`	Wash contaminated clothing before reuse.
`P377`	Leaking gas fire: Do not extinguish, unless leak can be stopped safely.
`P381`	In case of leakage, eliminate all ignition sources.
`P391`	Collect spillage.
`P403`	Store in a well-ventilated place.
`P403+P233`	Store in a well-ventilated place. Keep container tightly closed.
`P405`	Store locked up.
`P501`	Dispose of contents/container to ...
`P502`	Refer to manufacturer or supplier for information on recovery or recycling

Exposure Limits

NIOSH IDLH	250 ppm
Skin Notation	Yes — can be absorbed through skin

Physical Properties

Colorless gas with a chloroform-like odor at high concentrations.

Boiling Point	38°F
Vapor Pressure	1.9 atm
Specific Gravity	1.73 (liquid at 32°F)

NFPA 704 Diamond

Synonyms

bromomethane; monobromomethane

Data Sources

GHS Classification: PubChem CID 6323
NIOSH REL/IDLH: NIOSH Pocket Guide

Disclaimer: This information is compiled from public regulatory databases for reference only. It does not replace the manufacturer's Safety Data Sheet (SDS). Always consult the official SDS for your specific product before handling chemicals.

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