Description

4-Aminothiophenol (CAS No. 1193-02-8), also known as 4-aminobenzenethiol or 4-mercaptoaniline, is a high-purity organic compound with the molecular formula C₆H₇NS. This aromatic thiol features both an amino (–NH₂) and a thiol (–SH) functional group on a benzene ring, making it a versatile building block for chemical synthesis and material science applications. Available in crystalline form with a faint sulfurous odor, it is widely utilized in surface modification, nanotechnology, and as a precursor for pharmaceuticals and dyes. Store in a cool, dry place under inert conditions to prevent oxidation. Purity is guaranteed at ≥98% (HPLC), with trace metal analysis available upon request.

Properties

• CAS Number: 1193-02-8
• Complexity: 66.9
• IUPAC Name: 4-aminobenzenethiol
• InChI: InChI=1S/C6H7NS/c7-5-1-3-6(8)4-2-5/h1-4,8H,7H2
• InChI Key: WCDSVWRUXWCYFN-UHFFFAOYSA-N
• Exact Mass: 125.02992040
• Molecular Formula: C6H7NS
• Molecular Weight: 125.19
• SMILES: C1=CC(=CC=C1N)S
• Topological: 27
• Monoisotopic Mass: 125.02992040
• Synonyms: 4-Aminothiophenol, 1193-02-8, 4-AMINOBENZENETHIOL, Benzenethiol, 4-amino-, 4-Mercaptoaniline, p-Aminothiophenol, p-Aminobenzenethiol, p-Mercaptoaniline, Benzenethiol, p-amino-, p-Aminophenylmercaptan, p-aminophenyl mercaptan, EINECS 214-763-4, BRN 0906904, AI3-52549, 8X56V0K20X, P-AMINOPHENYLTHIOL, 4-MERCAPTOBENZENAMINE, AMINOBENZENETHIOL, P-, DTXSID1074466, Benzenethiol, 4-amino-(9CI), DTXCID2033497, 6976-04-1 (Na salt), 214-763-4, 4-aminobenzene-1-thiol, 4-aminothiphenol, 4-Amino thiophenol, 4-Aminothiophenol, tech grade, 4-Amino-benzenethiol, MFCD00007880, 4-Aminophenyl mercaptan, UNII-8X56V0K20X, p-amino-thiophenol, 4-Aminothiophenol, 97%, SCHEMBL49836, SCHEMBL1644201, SCHEMBL9376574, SCHEMBL27452807, BCP18598, SBB059850, AKOS009156582, AC-1080, CS-W013508, FA02055, PS-3195, 4-Aminothiophenol, technical grade, 90%, BP-10049, DB-003458, A0623, NS00023851, ST51046114, EN300-40426, Q27271149, F0001-0317, 4-Aminobenzenethiol;4-Aminophenyl mercaptan;4-Mercaptoaniline

Application

4-Aminothiophenol serves as a critical linker molecule in self-assembled monolayers (SAMs) for gold and silver surfaces, enabling precise nanostructure fabrication. It is also employed in electrochemical biosensors due to its electron-transfer properties. Additionally, it acts as an intermediate in synthesizing dyes, pharmaceuticals, and corrosion inhibitors.

Safety and Hazards

GHS Hazard Statements

• H302 (16.3%): Harmful if swallowed [Warning Acute toxicity, oral]
• H314 (100%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]

Precautionary Statements

• P260, P264, P270, P280, P301+P317, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P330, P363, P405, and P501

Hazard Classes and Categories

• Acute Tox. 4 (16.3%)
• Skin Corr. 1C (100%)

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