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Merck
CN

662534

4-Mercaptobenzoic acid

technical grade, 90%

Synonym(s):

4-Carboxybenzenethiol, 4-Carboxythiophenol, 4-Mercaptobenzoic acid, p-Carboxybenzenethiol, p-Mercaptobenzoic acid

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About This Item

Linear Formula:
HSC6H4CO2H
CAS Number:
1074-36-8
Molecular Weight:
154.19
NACRES:
NA.22
PubChem Substance ID:
24884591
UNSPSC Code:
12352100
MDL number:
MFCD00016617
Assay:
90%
Form:
solid

Key Documents

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InChI

1S/C7H6O2S/c8-7(9)5-1-3-6(10)4-2-5/h1-4,10H,(H,8,9)

SMILES string

OC(=O)c1ccc(S)cc1

InChI key

LMJXSOYPAOSIPZ-UHFFFAOYSA-N

grade

technical grade

assay

90%

form

solid

mp

215-224 °C (lit.)

functional group

carboxylic acid

Quality Level

100

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General description

4-Mercaptobenzoic acid (4-MBA), also known as 4-Carboxythiophenol or p-Mercaptobenzoic acid, is an aromatic compound used in organic synthesis. 4-MBA promotes the formation of disulfide bonds through its reactive thiol (-SH) group. The sulfur atom in the thiol group is highly nucleophilic, allowing it to attack electrophiles.  facilitates the formation of diverse thiol-containing compounds.  Additionally, 4-MBA serves as a ligand to form coordination complexes and is utilized for surface functionalization, particularly in creating self-assembled monolayers (SAMs) on metal surfaces.

Application

  • SERS substrate for food adulteration detection: 4-Mercaptobenzoic acid was employed in the layer-by-layer biopolymer assembly for the in situ fabrication of AuNP plasmonic paper, serving as a SERS substrate useful in detecting food adulteration (Viriyakitpattana et al., 2024).
  • Development of magneto-plasmonic nanoparticles: Research highlighted the use of 4-Mercaptobenzoic acid in the multiwavelength SERS of magneto-plasmonic nanoparticles, obtained through combined laser ablation and solvothermal methods, showing versatility in nanoparticle synthesis (Talaikis et al., 2023).

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
WXBD8518V
MKCQ5928
MKCH7751
MKCD5992
MKCB0454V

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Chitosan-4-mercaptobenzoic acid: synthesis and characterization of a novel thiolated chitosan
Millotti et al.
Journal of Materials Chemistry, 20, 2432-2440 (2010)
A theoretical study of 4-Mercaptobenzoic acid assembled on Ag for surface-enhanced raman scattering applications
Mhlanga et al.
Materials Today Communications, 26, 101698-101698 (2021)
Electrochemical and infrared spectroscopy studies of 4-mercaptobenzoic acid SAMs on gold surfaces
Rosendahl et al.
Electrochimica Acta, 53, 6759-6767 (2008)
Coordination chemistry of 3-and 4-mercaptobenzoate ligands: versatile hydrogen-bonding isomers of the thiosalicylate (2-mercaptobenzoate) ligand
Tiekink et al.
Coordination Chemistry Reviews, 341, 19-52 (2017)
Wen-Tsen Chen et al.
Journal of the American Society for Mass Spectrometry, 21(5), 864-867 (2010-02-23)
We have developed a new internal standard method for the determination of the concentration of captopril (CAP) through surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS) using gold nanoparticles (Au NPs). This approach provided linearity for CAP over the concentration range 2.5-25
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