ethylene dichloride
C2technical
Definition
Meaning
A colourless, toxic, volatile liquid chemical compound with the formula C2H4Cl2, primarily used as an intermediate in the production of vinyl chloride monomer (VCM) for PVC plastic.
It is a chlorinated hydrocarbon solvent, historically used in industrial applications such as paint removal and degreasing, but its production and use have declined significantly due to health and environmental concerns.
Linguistics
Semantic Notes
Often referred to by its acronym 'EDC'. While the IUPAC name is '1,2-dichloroethane', 'ethylene dichloride' remains the dominant common name in industrial contexts. It should not be confused with ethylene, a gas, or with chloroform.
Dialectal Variation
British vs American Usage
Differences
No significant lexical difference. Both use 'ethylene dichloride' predominantly.
Connotations
Identical technical and hazardous connotations in both varieties.
Frequency
Equally low-frequency and specialized in both dialects, confined to chemical, industrial, and regulatory contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
The plant produces [ethylene dichloride]Workers were exposed to [ethylene dichloride][Ethylene dichloride] is converted into vinyl chloride.Vocabulary
Synonyms
Strong
Neutral
Weak
Usage
Context Usage
Business
Discussed in corporate reports of chemical companies, related to PVC production capacity and feedstock costs.
Academic
Appears in chemistry, environmental science, and toxicology papers regarding its synthesis, properties, or ecological impact.
Everyday
Virtually never used. Might appear in news reports about industrial accidents or environmental contamination.
Technical
Core term in chemical engineering, industrial hygiene, and regulatory documents (e.g., OSHA, EPA) concerning production processes, exposure limits, and waste handling.
Examples
By Part of Speech
verb
British English
- The facility dichlorinates ethylene to produce ethylene dichloride.
American English
- The company will crack the ethane to eventually produce ethylene dichloride.
adjective
British English
- The ethylene dichloride feedstock was contaminated.
- Ethylene-dichloride-based production is common.
American English
- The ethylene dichloride storage tank required inspection.
- An ethylene-dichloride leak was reported.
Examples
By CEFR Level
- Ethylene dichloride is a dangerous chemical.
- The factory stopped using ethylene dichloride due to safety concerns.
- Vinyl chloride is made from ethylene dichloride.
- The catalytic conversion of ethylene dichloride to vinyl chloride monomer is a critical step in PVC manufacturing.
- Regulations strictly limit occupational exposure to ethylene dichloride because of its carcinogenic potential.
Learning
Memory Aids
Mnemonic
Imagine an ETHYLENE (a simple hydrocarbon) molecule where two (DI) chlorine (CHLOR) atoms have attached (IDE) to it, one on each carbon.
Conceptual Metaphor
INDUSTRIAL BUILDING BLOCK (a fundamental, if hazardous, component used to construct a more common material like PVC).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate word-for-word as 'этилен дихлорид' without verification; the standard Russian term is '1,2-дихлорэтан' or 'хлористый этилен'.
- Avoid confusion with 'этилен' (ethylene gas) or 'хлорид' (chloride) used in other compound names like polyvinyl chloride (PVC).
Common Mistakes
- Mispronouncing 'ethylene' as /iːˈθaɪliːn/ (like 'ether').
- Misspelling as 'ethelyne dichloride' or 'ethylene di-chloride'.
- Using it as a general term for solvents; it is a specific compound.
Practice
Quiz
What is the primary industrial use of ethylene dichloride?
FAQ
Frequently Asked Questions
No, they are different compounds. Chloroform is CHCl3, while ethylene dichloride is C2H4Cl2. They have different structures, properties, and uses.
It is toxic, flammable, and a suspected human carcinogen. Inhalation or skin contact can cause serious health effects, including damage to the nervous system, liver, and kidneys.
In this context, 'EDC' almost always stands for 'ethylene dichloride'. However, in other contexts (e.g., environmental science), EDC can also mean 'Endocrine Disrupting Compound', which is a different concept entirely.
It is not a consumer product. Its sale and use are heavily restricted to licensed industrial and research facilities due to its significant health and environmental risks.