101-50-8

Basic information

• Product Name: 4-Aminoazobenzene-3,4'-disulfonic acid
• Synonyms: PARA AMINO AZOBENZENE 3,4 DISULFONIC ACID;P-AMINOAZOBENZENE-3,4'-DISULFONIC ACID;2-amino-5-((4-sulfophenyl)azo)-benzenesulfonicaci;2-amino-5-[(4-sulfophenyl)azo]-benzenesulfonicaci;4-(4-amino-3-sulfophenylazo)-benzenesulfonicaci;4-amino-3,4’-disulfoazobenzene;4-aminoazobenzene-3,4’-disulfonic;4-amino-azobenzene-4’-disulfonicacid
• CAS NO: 101-50-8
• Molecular Formula: C₁₂H₁₁N₃O₆S₂
• Molecular Weight: 357.36
• EINECS: 202-947-7
• Product Categories: Intermediates of Dyes and Pigments
• Mol File: 101-50-8.mol
• Article Data: 0

Chemical Properties

• Boiling Point: 103 °C
• Flash Point: 5°C
• Appearance: white powder
• Density: 1.5733 (rough estimate)
• Vapor Pressure: 0Pa at 25℃
• Refractive Index: 1.6390 (estimate)
• PKA: -1.13±0.50(Predicted)
• Water Solubility: 1000g/L at 25℃
• CAS DataBase Reference: 4-Aminoazobenzene-3,4'-disulfonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 4-Aminoazobenzene-3,4'-disulfonic acid(101-50-8)
• EPA Substance Registry System: 4-Aminoazobenzene-3,4'-disulfonic acid(101-50-8)

Safety Data

• Hazardous Substances Data: 101-50-8(Hazardous Substances Data)

Usage

Uses

4-Aminoazobenzene-3,4''-disulfonic Acid is used in the synthesis of novel acid dyes with a coumarin moiety.

Definition

ChEBI: A member of the class of azobenzenes that is azobenzene in which one of the phenyl groups is substituted at the para position by a sulfo group, while the other is substituted at a meta position by a sulfo group and at the pa a position by an amino group. The disodium salt is the biological stain 'fast yellow'.

Flammability and Explosibility

Nonflammable

Upstream product

• 62-53-3 aniline 
• 7664-93-9 sulfuric acid 
• 60-09-3 aniline yellow 
• 104-23-4 4'-aminoazobenzene-4-sulfonic acid 
• 3457-98-5 4-phenylazoaniline hydrochloride 
• 305-80-6 4-diazobenzenesulfonic acid 

Downstream Products

• 866915-33-5 C₂₂H₂₃N₅O₁₀S₃ 
• 111066-63-8 C₁₉H₁₇N₅O₆S₂ 
• 88-45-9 2,5-diaminobenzenesulfonic acid 
• 121-57-3 4-aminobenzene sulfonic acid 
• 116668-64-5 azobenzene-3,4'-disulfonic acid