nitromethane
C2/AdvancedTechnical / Scientific
Definition
Meaning
A highly flammable, oily liquid chemical compound (CH₃NO₂) with a distinctive odour, used as a solvent and as a fuel additive in high-performance engines.
A colourless to pale yellow liquid composed of a methane molecule where one hydrogen atom is replaced by a nitro group. Its primary function is industrial, but it is also known for its use in amateur rocketry and as a high-energy component in certain explosive mixtures.
Linguistics
Semantic Notes
The term is a compound noun combining the prefix 'nitro-' (indicating the presence of a -NO₂ group) and 'methane' (the simplest alkane). Its meaning is precise and domain-specific, with no everyday figurative or colloquial uses.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Both varieties use the same term and formula.
Connotations
Associated primarily with chemistry, motor racing (fuel additive), and industrial processes in both dialects.
Frequency
Equally low-frequency and specialised in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
[to react with X] in nitromethanethe [solubility of Y] in nitromethaneVocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Relevant only in the chemical supply or motorsports industries; e.g., 'Our quarterly order of nitromethane for the racing team has been delayed.'
Academic
Used in organic chemistry, engineering, and materials science literature; e.g., 'The reaction was carried out in nitromethane under inert atmosphere.'
Everyday
Virtually never used in casual conversation except by specific hobbyists.
Technical
The primary register; used to describe a solvent, monopropellant, or fuel component; e.g., 'Top Fuel dragsters run on a mixture containing a high percentage of nitromethane.'
Examples
By Part of Speech
verb
British English
- N/A - Not used as a verb.
American English
- N/A - Not used as a verb.
adverb
British English
- N/A - Not used as an adverb.
American English
- N/A - Not used as an adverb.
adjective
British English
- N/A - Not standardly used adjectivally.
American English
- N/A - Not standardly used adjectivally.
Examples
By CEFR Level
- The laboratory has strict rules for handling nitromethane due to its flammability.
- Some model aeroplanes use a special fuel containing nitromethane.
- Nitromethane is a versatile polar solvent frequently employed in organic synthesis for certain substitution reactions.
- The team's mechanic adjusted the fuel mixture to increase the percentage of nitromethane for the qualifying run.
Learning
Memory Aids
Mnemonic
Think: 'NITRO' (like in nitro-glycerine or explosive) + 'METHANE' (a simple gas). A methane molecule given explosive potential by adding a nitro group.
Conceptual Metaphor
N/A - It is a concrete technical term.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate 'nitro' and 'methane' separately as 'нитро' + 'метан' in a way that suggests two different substances; it is one compound: 'нитрометан' (nitrometan).
- Beware of false friends: 'nitrogen' is 'азот', but 'nitro-' as a prefix is 'нитро-'.
Common Mistakes
- Spelling: 'nitromethan' (dropping the 'e'), 'nitro-methane' (unnecessary hyphen).
- Confusion with 'nitromethane' as a plural (it is uncountable).
- Mispronunciation: stressing 'meth' (/ˈmɛθ/) instead of 'methane' (/ˈmiːθeɪn/).
Practice
Quiz
In which of these contexts is 'nitromethane' LEAST likely to be mentioned?
FAQ
Frequently Asked Questions
Pure nitromethane is flammable and can be explosive under conditions of high pressure, high temperature, or when combined with certain other chemicals. It is classified as a hazardous material.
Its primary uses are as an industrial solvent, a stabiliser, and a chemical intermediate. Its most famous application is as a high-performance fuel additive, especially in drag racing, model engines, and amateur rocketry.
Yes, but its sale is often regulated due to its potential misuse in explosive mixtures. It is typically purchased from specialised chemical suppliers or motorsports fuel dealers with appropriate safety credentials.
It has a distinctive, slightly sweet, and pungent odour often likened to chloroform or a strong solvent. The smell is a recognised hazard warning sign.