Hydrochloric acid

CAS Registry Number®

7647-01-0

CAS Name

Hydrochloric acid

Molecular Formula

ClH

Molecular Mass

36.46

Cite this Page

Hydrochloric acid.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=7647-01-0 (retrieved 2025-07-04) (CAS RN: 7647-01-0).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Boiling Point (1)

    -85 °C

  • Melting Point (1)

    -114 °C

  • Density (2)

    34 mol/L @ Temp: -93 °C; Press: 2.40696287 x 10⁵ Torr

Source(s)

Other Names and Identifiers

InChI

InChI=1S/ClH/h1H

InChIKey

InChIKey=VEXZGXHMUGYJMC-UHFFFAOYSA-N

SMILES

Cl

Canonical SMILES

Cl

Other Names for this Substance

  • Hydrochloric acid
  • Anhydrous hydrochloric acid
  • Chlorohydric acid
  • Dilute hydrochloric acid
  • Hydrogen chloride

View All

Deleted or Replaced CAS Registry Numbers

113962-65-5, 51005-19-7, 61674-62-2, 218625-68-4

CAS INSIGHTSTM
Aspergillus fungus, computer illustration. This is a toxic fungus that causes diseases in humans.