Description

Benzenesulfonic acid, 3-[(4-amino-3-methoxyphenyl)diazenyl]- (CAS No. 138-28-3) is a high-purity azo dye intermediate with the molecular formula C₁₃H₁₃N₃O₄S. This compound is characterized by its benzenesulfonic acid backbone functionalized with a diazenyl group linked to a 4-amino-3-methoxyphenyl moiety, making it a versatile building block for synthetic chemistry applications. It is supplied as a finely powdered solid with >98% purity (HPLC), ensuring consistency for research and industrial use. Ideal for use in dye synthesis, coordination chemistry, and material science, this product is rigorously tested for quality, including residual solvent analysis and heavy metal screening. Store in a cool, dry place, protected from light to maintain stability.

Properties

• CAS Number: 138-28-3
• Complexity: 463
• IUPAC Name: 3-(4-amino-3-methoxy-phenyl)azobenzenesulfonic acid
• InChI: InChI=1S/C13H13N3O4S/c1-20-13-8-10(5-6-12(13)14)16-15-9-3-2-4-11(7-9)21(17,18)19/h2-8H,14H2,1H3,(H,17,18,19)
• InChI Key: FUWKWQCNMNPILC-UHFFFAOYSA-N
• Exact Mass: 307.06267708
• Molecular Formula: C13H13N3O4S
• Molecular Weight: 307.33
• SMILES: COC1=C(C=CC(=C1)N=NC2=CC(=CC=C2)S(=O)(=O)O)N
• Topological: 123
• Monoisotopic Mass: 307.06267708
• Synonyms: Benzenesulfonic acid, 3-[(4-amino-3-methoxyphenyl)azo]-, EINECS 205-321-1, Benzenesulfonic acid, 3-((4-amino-3-methoxyphenyl)azo)-, Benzenesulfonic acid, 3-(2-(4-amino-3-methoxyphenyl)diazenyl)-, Benzenesulfonic acid, 3-[2-(4-amino-3-methoxyphenyl)diazenyl]-, 138-28-3, 3-[(4-amino-3-methoxyphenyl)diazenyl]benzenesulfonic acid, 3-((4-AMINO-3-METHOXYPHENYL)DIAZENYL)BENZENESULFONIC ACID, m-((4-Amino-3-methoxyphenyl)azo)benzenesulphonic acid, m-[(4-amino-3-methoxyphenyl)azo]benzenesulphonic acid, SCHEMBL3094048, SCHEMBL3094056, DTXSID3059680, SCHEMBL10351993, SCHEMBL10351994, FUWKWQCNMNPILC-UHFFFAOYSA-N, AKOS015960984, AC-12615, DB-042422, NS00024476, (E)-3-((4-amino-3-methoxyphenyl)diazenyl)benzenesulfonic acid, Benzenesulfonic acid,3-[2-(4-amino-3-methoxyphenyl)diazenyl]-

Application

This compound is primarily used as a key intermediate in the synthesis of azo dyes, which are widely employed in textile, ink, and pigment industries. Its reactive diazenyl and sulfonic acid groups make it suitable for creating water-soluble dyes with high colorfastness. Researchers also utilize it in coordination chemistry to study metal-ligand interactions due to its chelating properties. Additionally, it serves as a model compound for studying azo bond cleavage mechanisms in environmental degradation studies.

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