methyl bromide

Học thuật
Thân thiện
methyl bromide

A scientist carefully handles a sealed container of methyl bromide in a laboratory.

Definition

Noun: A colorless, toxic compound (CH₃Br) that exists as a gas or volatile liquid at room temperature, historically used extensively as a fumigant pesticide to control rodents, insects, nematodes, and weeds in agriculture and for soil and commodity quarantine treatment.

Usage
  • As a subject: Methyl bromide is highly effective but ozone-depleting.
  • As an object: Many countries have phased out the use of methyl bromide.
  • With modifiers: Agricultural methyl bromide use has been restricted under the Montreal Protocol.
Examples
  • The shipment was fumigated with methyl bromide before export.
  • Due to its toxicity, handlers of methyl bromide require protective equipment.
  • The global phase-out of methyl bromide began in 2005.
Advanced Usage
  • Technical/Regulatory Context: In environmental science and international treaties, "methyl bromide" specifically refers to an ozone-depleting substance controlled under the Montreal Protocol.
    • Example: The party reported a critical-use exemption for methyl bromide.
Variants and Related Words
  • Bromomethane: The systematic IUPAC name for the same chemical compound (CH₃Br).
  • Fumigant: A general term for a chemical pesticide that vaporizes to kill pests; methyl bromide is a type of fumigant.
Synonyms
  • Bromomethane (primary technical synonym)
  • CH₃Br (chemical formula)
Notes on Meaning

This term refers strictly to the specific chemical compound. Its primary historical meaning is as a broad-spectrum fumigant. In contemporary contexts, its meaning is heavily associated with its environmental impact and regulatory status as a phased-out substance.

methyl bromide

A scientist carefully handles a sealed container of methyl bromide in a laboratory.

Noun
  1. a poisonous gas or liquid (CH3Br) used to fumigate rodents, worms, etc.