Thiomalic acid

A thiomalic acid or mercaptosuccinic acid is a dicarboxylic acid containing a thiol functional group. As suggested by its name, it contains an SH group instead of an OH group on malic acid. Salts and esters are known as thiomalates.

Thiomalic acid

Names
Preferred IUPAC name 2-Sulfanylbutanedioic acid
Other names 2-Mercaptosuccinic acid
Identifiers
CAS Number	70-49-5 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:38705 Y
ChemSpider	6032 Y
ECHA InfoCard	100.000.670
EC Number	200-736-4
PubChem CID	6268
UNII	94239W5L4H Y
CompTox Dashboard (EPA)	DTXSID20861615
InChI InChI=1S/C4H6O4S/c5-3(6)1-2(9)4(7)8/h2,9H,1H2,(H,5,6)(H,7,8) Y Key: NJRXVEJTAYWCQJ-UHFFFAOYSA-N Y
SMILES C(C(C(=O)O)S)C(=O)O
Properties
Chemical formula	C4H6O4S
Molar mass	150.15 g·mol−1
Related compounds
Other anions	Thiomalate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Thiomalic acid forms the backbone of the pesticide malathion.