N-Methylaniline

N-Methylaniline

Synonyms: N-methylbenzenamine; N-Monomethylaniline; Anilinomethane; N-phenylmethylamine
Monomethylaniline; N-methylaminobenzene; Methylbenzeneamine; N-Methyl-phenylamine
(methylamino) benzene

N-Methylaniline (NMA) is an aniline derivative. It is an organic compound with the chemical formula C₆H₅NH(CH₃). The substance exists as a colorless or slightly yellow viscous liquid and turns brown when exposed to air. The chemical is insoluble in water. It is used as a latent and coupling solvent and is also used as an intermediate for dyes, agrochemicals and other organic products manufacturing. NMA is toxic and exposure can cause damage to the central nervous system and can also cause liver and kidney failure.

Use as a fuel additive

N-Methylaniline is a principal component of NMA (monomethylaniline), a non-traditional antiknock agent increasingly used by petroleum refiners and fuel distributors around the world to increase the octane number of gasoline petrol. It is usually added to gasoline in concentration of around 1.3% volume to avoid high gum levels that can cause increased carbon deposits in engine parts. Higher concentrations are permitted by most regulatory agencies if a detergent and a fuel combustion modifier are added to the component to keep gum formation from happening. NMA blended in those concentrations to gasoline / petrol is not more toxic than the hundreds of chemicals that compose this fuel.

By Misty Liu

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