Molecule reference

Paracetamol Structure, Formula, Molecular Weight, SMILES & 3D Viewer

Paracetamol, also known as acetaminophen, is an analgesic and antipyretic compound. This page includes the paracetamol structure, 3D viewer, identifiers, properties, class, and MolDraw editor link.

Published: 6 Jun 2026 · Data identifiers cross-checkable with PubChem CID 1983

Structure

2D chemical structure of paracetamol

Paracetamol contains a para-substituted phenol and an acetanilide group. It is a compact example for discussing phenols, amides, aromatic substitution patterns, and medicinal chemistry identifiers.

Draw or edit paracetamol in MolDraw

3D Viewer

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Properties and Use

  • Common names: Paracetamol, acetaminophen
  • IUPAC name: N-(4-hydroxyphenyl)acetamide
  • Class: analgesic and antipyretic; anilide derivative
  • Typical chemistry context: phenols, amides, hydrogen bonding, and simple drug-like small molecules.

Computed properties

LogP (XLogP)0.5TPSA49.3 Ų
H-bond donors2H-bond acceptors2
Rotatable bonds1Heavy atoms11

Synonyms and functional groups

Synonyms

Acetaminophen4-AcetamidophenolN-(4-Hydroxyphenyl)acetamideAPAP4'-Hydroxyacetanilide

Functional groups present

PhenolAmideAromatic ringAcetamide substituent

Downloads

PNG SVG SDF PDB MOL PDBQT

Convert this molecule

SMILES → MOL SMILES → PDB SMILES → PDBQT SMILES → InChI SMILES → Formula SMILES → Weight

Safety and handling

Educational note only: paracetamol/acetaminophen is biologically active. Use the relevant SDS, institutional procedures, and local regulations for handling and disposal. This page is not medical advice or an SDS replacement.

Related molecule structures

AspirinAnalgesic reference with aromatic acid and ester groups IbuprofenNSAID with a hydrophobic arylpropionic acid scaffold CaffeineBioactive small molecule with heterocycle nitrogens All molecule pages

FAQ

What is the formula of paracetamol?

Paracetamol, also called acetaminophen, has the molecular formula C8H9NO2.

What is paracetamol's molecular weight?

The molecular weight is 151.16 g/mol and the exact mass is 151.063328530 Da.

Which functional groups are in paracetamol?

Paracetamol contains a phenol, an amide, and an aromatic ring.