α-Lipoic acid

CAS Registry Number®

1200-22-2

CAS Name

α-Lipoic acid

Molecular Formula

C8H14O2S2

Molecular Mass

206.33

Cite this Page

α-Lipoic acid.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/ChemicalDetail.aspx?ref=1200-22-2 (retrieved 2025-07-02) (CAS RN: 1200-22-2).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Boiling Point (1)

    160-165 °C @ Press: 0.4 Torr

  • Melting Point (2)

    46-48 °C

Source(s)

Other Names and Identifiers

InChI

InChI=1S/C8H14O2S2/c9-8(10)4-2-1-3-7-5-6-11-12-7/h7H,1-6H2,(H,9,10)/t7-/m1/s1

InChIKey

InChIKey=AGBQKNBQESQNJD-SSDOTTSWSA-N

SMILES

C(CCCC(O)=O)[C@@H]1CCSS1

Canonical SMILES

O=C(O)CCCCC1SSCC1

Other Names for this Substance

  • 1,2-Dithiolane-3-pentanoic acid, (3R)-
  • 1,2-Dithiolane-3-valeric acid, (+)-
  • 1,2-Dithiolane-3-pentanoic acid, (R)-
  • (3R)-1,2-Dithiolane-3-pentanoic acid
  • d-Thioctic acid

View All

Deleted or Replaced CAS Registry Numbers

57828-26-9, 2087491-16-3

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