maleic anhydride
Very LowTechnical/Scientific
Definition
Meaning
A white crystalline compound with the chemical formula C₄H₂O₃, produced by the oxidation of benzene or butane, used primarily in the manufacture of polyester resins and alkyd resins.
An important industrial chemical intermediate in the production of unsaturated polyester resins, agricultural chemicals, lubricant additives, and as a dienophile in Diels-Alder reactions in organic synthesis.
Linguistics
Semantic Notes
The term is a compound noun where 'maleic' refers to maleic acid (from Latin 'malum' meaning apple, due to its original isolation from apple juice) and 'anhydride' indicates a compound formed by removal of water. It is exclusively used in chemistry and industrial manufacturing contexts.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling conventions follow standard chemical nomenclature which is international.
Connotations
Identical technical connotations in both varieties.
Frequency
Equally rare in general discourse in both regions, appearing only in specialized chemical, engineering, and industrial contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
Maleic anhydride is used to V (produce/modify)Maleic anhydride reacts with NPThe production of maleic anhydride involves NPVocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Discussed in chemical industry reports, market analyses, and supply chain logistics for raw materials.
Academic
Used in chemistry textbooks, research papers on polymer science, organic synthesis, and chemical engineering journals.
Everyday
Virtually never used in everyday conversation.
Technical
Core term in chemical process descriptions, material safety data sheets (MSDS), patent applications, and laboratory manuals.
Examples
By Part of Speech
adjective
British English
- The maleic anhydride process requires careful temperature control.
- A maleic anhydride derivative was identified.
American English
- The maleic anhydride unit was shut down for maintenance.
- Maleic anhydride chemistry is central to the project.
Examples
By CEFR Level
- Maleic anhydride is an important chemical.
- The factory produces maleic anhydride for the plastics industry.
- Maleic anhydride must be stored in a dry environment.
- The catalytic oxidation of n-butane is the predominant method for manufacturing maleic anhydride on an industrial scale.
- The reactivity of maleic anhydride as a dienophile makes it invaluable for synthesising complex organic molecules via the Diels-Alder reaction.
Learning
Memory Aids
Mnemonic
Think 'MALE' + 'IC' (like in metallic) + 'ANHYDRIDE' (anhydrous = without water). A male (strong) acid derivative without water.
Conceptual Metaphor
INDUSTRIAL BUILDING BLOCK (It is conceptualized as a fundamental component used to construct larger, more complex chemical products.)
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating 'maleic' as related to the English word 'male' (мужской). It is derived from 'malic acid'.
- The word 'anhydride' should not be confused with 'anhydrous' (безводный), though they share the same root; an anhydride is a specific type of compound formed by water removal.
Common Mistakes
- Misspelling as 'maliec anhydride' or 'maleic anhydrate'.
- Incorrect pronunciation stressing the first syllable (/ˈmeɪlɪk/) instead of the second (/məˈliːɪk/).
- Using it as a countable noun (e.g., 'a maleic anhydride') – it is typically uncountable mass noun.
Practice
Quiz
In which industry is maleic anhydride primarily used?
FAQ
Frequently Asked Questions
Yes, it is corrosive and can cause severe skin and eye burns. It is also a respiratory irritant and must be handled with appropriate personal protective equipment (PPE) in a controlled environment.
Industrially, it is primarily produced by the vapour-phase oxidation of either benzene or, more commonly now, n-butane in the presence of a vanadium-phosphorus oxide catalyst.
Maleic acid is the dicarboxylic acid (HOOC-CH=CH-COOH). Maleic anhydride is the cyclic anhydride formed from maleic acid by the loss of one water molecule. The anhydride is more reactive, particularly in polymerisation reactions.
It is highly unlikely. The term is confined to professional and academic contexts in chemistry, chemical engineering, and industrial manufacturing. The end products (like plastics) contain it, but the term itself is not used by consumers.