ethylene dibromide
C2Technical/Scientific
Definition
Meaning
A colorless, dense liquid chemical compound with the formula C₂H₄Br₂, historically used as a pesticide, especially as a soil fumigant and lead scavenger in leaded gasoline.
A volatile organobromide compound (also known as 1,2-dibromoethane) that functions as an alkylating agent, causing DNA damage. Its primary historical applications were in agriculture as a fumigant for nematodes and insects, and in the petroleum industry as an additive to prevent lead oxide deposition in engines using leaded gasoline.
Linguistics
Semantic Notes
This is a highly technical term from chemistry, toxicology, and environmental science. It is not used in everyday conversation. Its usage is almost exclusively in historical, regulatory, or hazardous materials contexts. It is often referred to by its abbreviation EDB.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling remains consistent. The abbreviation 'EDB' is used in both.
Connotations
In both varieties, it carries strong connotations of toxicity, carcinogenicity, and environmental hazard. It is associated with banned substances and historical industrial/agricultural practices.
Frequency
Extremely low frequency in general language. Usage is confined to specialized scientific, regulatory, and historical texts. Frequency is identical between UK and US English within those domains.
Vocabulary
Collocations
Grammar
Valency Patterns
[Ethylene dibromide] + [verb: was used, is banned, contaminates, caused][Verb: Ban, Regulate, Detect, Phase out] + [ethylene dibromide][Adjective: Carcinogenic, Volatile, Toxic] + [ethylene dibromide]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Discussed in the context of environmental liability, remediation costs, and historical product formulation.
Academic
Studied in chemistry, environmental science, toxicology, and public health for its properties, effects, and environmental persistence.
Everyday
Virtually never used. Might be encountered in news reports about pollution or historical exposés.
Technical
Precise term used in chemical analysis, hazardous materials handling, regulatory documents (EPA, WHO), and historical agricultural engineering texts.
Examples
By Part of Speech
adjective
British English
- The ethylene dibromide contamination was widespread.
American English
- Ethylene dibromide use was phased out in the 1980s.
Examples
By CEFR Level
- Ethylene dibromide is a dangerous chemical.
- This old petrol had ethylene dibromide in it.
- The use of ethylene dibromide as a pesticide was banned due to health concerns.
- Scientists found traces of ethylene dibromide in the soil samples.
- Regulatory agencies have established strict limits for ethylene dibromide residues in food commodities due to its carcinogenic potential.
- The historical application of ethylene dibromide as a lead scavenger in aviation fuel has left a legacy of contamination at some airfields.
- The pharmacokinetics of ethylene dibromide involve cytochrome P450-mediated oxidation, forming DNA-alkylating intermediates that confer its mutagenicity.
- Remediation of aquifers contaminated with ethylene dibromide is particularly challenging because of its density and solubility characteristics.
Learning
Memory Aids
Mnemonic
Think: ETHYL-ene (a two-carbon chain) DI-BROM-ide (with two BROMine atoms attached). 'Ethyl' + 'two bromines'.
Conceptual Metaphor
A HISTORICAL REMEDY THAT BECAME A POISON (from solution for engine knock and pest control to a source of contamination and disease).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate 'ethylene' as 'эфир' (ether). Correct is 'этилен'.
- Do not translate 'dibromide' word-for-word as 'дибромид'. The standard chemical name in Russian is '1,2-дибромэтан' or 'этиленбромид'.
- Avoid using the common name 'EDB' without explanation in translations for general audiences, as the abbreviation may not be recognized.
Common Mistakes
- Mispronunciation: 'ethylene di-broh-mide' (wrong syllable stress). Correct is 'di-BRO-mide'.
- Misspelling: 'ethylene dybromide', 'ethyline dibromide'.
- Confusing it with 'ethylene glycol' (a different, also toxic, compound).
Practice
Quiz
What was a primary industrial use of ethylene dibromide (EDB) in the 20th century?
FAQ
Frequently Asked Questions
No, its use as a pesticide and gasoline additive has been banned or severely restricted in most countries since the 1980s due to its toxicity and carcinogenicity.
It is classified as a probable human carcinogen, can cause damage to the liver, kidneys, and respiratory system, and is toxic to the reproductive system. It is also persistent in groundwater.
The prefix 'di-' means two, and 'bromide' refers to the element bromine. So, 'dibromide' indicates the molecule contains two bromine atoms.
They are different compounds. Ethylene dibromide (C2H4Br2) has two carbon atoms and two bromine atoms. Methyl bromide (CH3Br) has one carbon atom and one bromine atom. Both were used as fumigants but have different chemical properties and toxicity profiles.