What does aminophenol mean?
Aminophenol is an organic chemical compound whose molecule consists of a benzene ring carrying two substituents: an amino group (–NH2) and a hydroxyl group (–OH). Because these groups can occupy different positions on the ring, aminophenol exists as three distinct isomers — ortho-, meta-, and para-aminophenol — with the para form being by far the most commercially important. It appears chiefly in technical and industrial contexts: it is a key intermediate in dye manufacturing, photographic developing solutions, and above all the production of paracetamol (acetaminophen), one of the world's most widely used pain relievers. The word carries no emotional connotation and belongs firmly to the vocabulary of chemists, pharmacologists, and industrial chemists rather than everyday speech. Aminophenol itself is toxic and should never be confused with the safe, finished medicines made from it. Its interest lies in this role as a humble building block behind familiar products.
nounAny of three isomeric organic compounds consisting of a benzene ring bearing both an amino group and a hydroxyl group; especially para-aminophenol, used as an intermediate in the manufacture of dyes and of the analgesic drug paracetamol.
- Any of the three isomeric compounds in which an amino group and a hydroxyl group are attached to a benzene ring.
- Specifically, para-aminophenol, an industrial intermediate used in making dyes, photographic developers, and paracetamol.
"Para-aminophenol serves as the key intermediate in the industrial synthesis of paracetamol."
"The chemist purified the aminophenol before proceeding to the next stage of the synthesis."
"Because aminophenol oxidizes readily in air, it must be stored under inert conditions."
Pluralized regularly when referring collectively to the isomers or multiple samples; uncommon outside technical writing.
"The three aminophenols differ only in the relative positions of their functional groups."
The painkiller in your medicine cabinet begins its life as aminophenol — a toxic little molecule that chemistry transforms into one of the world's most trusted drugs.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of aminophenol
The name aminophenol is a straightforward combination of two established chemical terms: 'amino', referring to the –NH2 group ultimately named after ammonia, and 'phenol', the parent aromatic alcohol whose name derives from 'phene', an early term for benzene. Both roots trace back to nineteenth-century organic chemistry, when European chemists were systematically naming the new family of benzene-derived compounds. Related words sharing these roots include amine, ammonia, phenol, and benzene.
How aminophenol is actually used
Strictly a technical term used in chemistry, pharmacology, and industry; rarely encountered outside scientific writing. In practice, 'aminophenol' almost always refers to the para isomer unless a prefix (ortho-, meta-) indicates otherwise.
Easily confused with aminophenol
Paracetamol is the finished analgesic drug derived from aminophenol, whereas aminophenol itself is the raw chemical intermediate and is toxic if ingested.
Phenol is a simpler compound with only a hydroxyl group on the benzene ring, while aminophenol has both a hydroxyl and an amino group.