Salicylic acid

CAS Registry Number®

69-72-7

CAS Name

Salicylic acid

Molecular Formula

C7H6O3

Molecular Mass

138.12

Cite this Page

Salicylic acid.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/ChemicalDetail.aspx?ref=69-72-7 (retrieved 2025-07-02) (CAS RN: 69-72-7).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Boiling Point (1)

    ~211 °C (approx) @ Press: 20 Torr

  • Melting Point (1)

    157-159 °C

  • Density (1)

    1.443 g/cm³ @ Temp: 20 °C

Source(s)

  • (1) Hazardous Substances Data Bank data were obtained from the National Library of Medicine (US)

Other Names and Identifiers

InChI

InChI=1S/C7H6O3/c8-6-4-2-1-3-5(6)7(9)10/h1-4,8H,(H,9,10)

InChIKey

InChIKey=YGSDEFSMJLZEOE-UHFFFAOYSA-N

SMILES

C(O)(=O)C1=C(O)C=CC=C1

Canonical SMILES

O=C(O)C=1C=CC=CC1O

Other Names for this Substance

  • Benzoic acid, 2-hydroxy-
  • Salicylic acid
  • 2-Hydroxybenzoic acid
  • o-Hydroxybenzoic acid
  • Retarder W

View All

Deleted or Replaced CAS Registry Numbers

7681-06-3, 8052-31-1, 1186130-36-8

CAS INSIGHTSTM
Purple and red filaments produced by electrostatic discharge inside a plasma ball.