carbonyl chloride: meaning, definition, pronunciation and examples
C2/TechnicalTechnical/Scientific
Quick answer
What does “carbonyl chloride” mean?
A highly toxic, colorless gas with the chemical formula COCl₂, used as a chemical intermediate and chemical warfare agent.
Audio
Pronunciation
Definition
Meaning and Definition
A highly toxic, colorless gas with the chemical formula COCl₂, used as a chemical intermediate and chemical warfare agent.
A reactive compound where a carbonyl group (C=O) is bonded to two chlorine atoms; also known as phosgene. It is a key industrial chemical for producing plastics, pesticides, and pharmaceuticals, but infamous for its historical use as a chemical weapon.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Both varieties use 'carbonyl chloride' and 'phosgene' interchangeably in technical contexts.
Connotations
Identical technical connotations. The term 'phosgene' carries stronger historical/military associations due to its use in WWI.
Frequency
'Phosgene' is significantly more frequent in general and historical texts. 'Carbonyl chloride' is the precise IUPAC name and is more common in pure chemistry and pedagogical contexts.
Grammar
How to Use “carbonyl chloride” in a Sentence
[Substance] reacts with carbonyl chloride to form [Product].Carbonyl chloride is used in the production of [Product].Exposure to carbonyl chloride causes [Effect].Vocabulary
Collocations
Examples
Examples of “carbonyl chloride” in a Sentence
verb
British English
- The isocyanate is then carbonylated using carbonyl chloride.
- They had to phosgenate the precursor carefully.
American English
- The amine is treated with carbonyl chloride to form the isocyanate.
- The process involves phosgenating the diol.
adjective
British English
- The carbonyl chloride route is preferred for its efficiency.
- Phosgene gas was deployed during the trench warfare.
American English
- A carbonyl chloride derivative was identified in the mixture.
- The phosgene exposure protocol was immediately activated.
Usage
Meaning in Context
Business
In supply chain management for polycarbonate production.
Academic
Discussed in organic chemistry textbooks regarding acyl chlorides and chemical warfare history.
Everyday
Virtually never used in everyday conversation outside specific industrial or historical discussions.
Technical
Standard term in chemical synthesis, safety data sheets, and industrial process descriptions.
Watch out
Common Mistakes When Using “carbonyl chloride”
- Misspelling as 'carbonyl chlorid' or 'carbony chloride'.
- Confusing it with 'carbon tetrachloride' (CCl₄), a different compound.
- Using incorrect preposition: 'exposure of carbonyl chloride' instead of 'exposure to carbonyl chloride'.
FAQ
Frequently Asked Questions
Yes, phosgene is the common name for carbonyl chloride (COCl₂). 'Phosgene' is used more frequently, especially in historical and industrial contexts.
It is a severe respiratory irritant and toxic lung agent. Symptoms like pulmonary edema (fluid in the lungs) can be delayed for several hours after exposure, making it particularly insidious.
It is a crucial industrial chemical for producing polycarbonate plastics, pesticides (like carbamate insecticides), pharmaceuticals, and dyes. Its high reactivity makes it a useful 'building block' in synthesis.
Industrially, it is produced by passing a mixture of carbon monoxide and chlorine over an activated carbon catalyst: CO + Cl₂ → COCl₂.
A highly toxic, colorless gas with the chemical formula COCl₂, used as a chemical intermediate and chemical warfare agent.
Carbonyl chloride is usually technical/scientific in register.
Carbonyl chloride: in British English it is pronounced /ˌkɑː.bə.nɪl ˈklɔː.raɪd/, and in American English it is pronounced /ˌkɑːr.bə.nɪl ˈklɔːr.aɪd/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: CARBONyl = has a carbon atom; chloride = has chlorine. It's carbon's double bond to oxygen (carbonyl) with two chlorines attached.
Conceptual Metaphor
A chemical 'building block' (for synthesis) / A 'silent killer' (due to its delayed toxic effects and historical use).
Practice
Quiz
Which of the following is a primary hazard associated with carbonyl chloride?