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08561

Sigma-Aldrich

(S)-(−)-α -Lipoic acid

≥97% (HPLC)

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Synonym(s):
(S)-1,2-Dithiolane-3-pentanoic acid, (S)-6,8-Thioctic acid
Empirical Formula (Hill Notation):
C8H14O2S2
CAS Number:
Molecular Weight:
206.33
Beilstein:
81852
MDL number:
UNSPSC Code:
12352106
PubChem Substance ID:
NACRES:
NA.25

Quality Level

Assay

≥97% (HPLC)

optical purity

enantiomeric excess: ≥98.0% (HPLC)

storage temp.

−20°C

SMILES string

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

InChI

1S/C8H14O2S2/c9-8(10)4-2-1-3-7-5-6-11-12-7/h7H,1-6H2,(H,9,10)/t7-/m0/s1

InChI key

AGBQKNBQESQNJD-ZETCQYMHSA-N

Biochem/physiol Actions

Biological antioxidant with prooxidant activities . Method for enantioseparation of lipoic acid in dietary supplements by capillary electrophoresis.

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Hazard Classifications

Acute Tox. 4 Oral

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

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Shuji Kodama et al.
Electrophoresis, 33(15), 2441-2445 (2012-08-14)
Lipoic acid, an antioxidant, naturally occurs as the (R)-enantiomer, while synthetic lipoic acid is racemic. It is thus of interest to know the (R)-enantiomer content of lipoic acid supplements. Here, we used capillary electrophoresis to directly enantioseparate lipoic acid in
Ronald Bentley
Chemical Society reviews, 34(7), 609-624 (2005-06-21)
Chiral structures profoundly influence chemical and biological processes. While chiral carbon biomolecules have received much attention, chirality is also possible in certain sulfur compounds; just as with carbon, there can be differences in the physiological behavior of chiral sulfur compounds.
L Packer et al.
Free radical biology & medicine, 19(2), 227-250 (1995-08-01)
alpha-Lipoic acid, which plays an essential role in mitochondrial dehydrogenase reactions, has recently gained considerable attention as an antioxidant. Lipoate, or its reduced form, dihydrolipoate, reacts with reactive oxygen species such as superoxide radicals, hydroxyl radicals, hypochlorous acid, peroxyl radicals
Hadi Moini et al.
Toxicology and applied pharmacology, 182(1), 84-90 (2002-07-20)
Reactive oxygen (ROS) and nitrogen oxide (RNOS) species are produced as by-products of oxidative metabolism. A major function for ROS and RNOS is immunological host defense. Recent evidence indicate that ROS and RNOS may also function as signaling molecules. However

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