4-Mercaptobenzoic acid

4-Mercaptobenzoic acid (p-mercaptobenzoic acid, p-MBA) is an organosulfur compound with the formula para-C₆H₄(−SH)(−COOH). It is used as a ligand in thiolate-protected gold cluster compounds, such as Au₁₀₂(p-MBA)₄₄.^[2][3]

4-Mercaptobenzoic acid

Names
IUPAC name 4-sulfanylbenzoic acid
Identifiers
CAS Number	1074-36-8 Y
3D model (JSmol)	Interactive image
ChEMBL	ChEMBL98938
ChemSpider	86425
ECHA InfoCard	100.121.577
EC Number	600-825-1
PubChem CID	95738
CompTox Dashboard (EPA)	DTXSID40148036
InChI InChI=1S/C7H6O2S/c8-7(9)5-1-3-6(10)4-2-5/h1-4,10H,(H,8,9) Key: LMJXSOYPAOSIPZ-UHFFFAOYSA-N
SMILES C1=CC(=CC=C1C(=O)O)S
Properties
Chemical formula	C7H6O2S
Molar mass	154.18 g·mol−1
Melting point	215–224 °C (419–435 °F; 488–497 K)
Hazards
GHS labelling:[1]
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P271, P280, P302+P352, P305+P351+P338
Related compounds
Related compounds	2-mercaptobenzoic acid 3-mercaptobenzoic acid [Wikidata]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

See also

• Gold cluster