91-34-9

Basic information

• Product Name: 4,4'-bis[(4-hydroxyphenyl)azo]stilbene-2,2'-disulphonic acid
• Synonyms: 4,4'-bis[(4-hydroxyphenyl)azo]stilbene-2,2'-disulphonic acid;Direct Yellow 4 dye;2,2'-(1,2-Ethenediyl)bis[5-(4-hydroxyphenylazo)benzenesulfonic acid];4,4'-Bis(4-hydroxyphenylazo)stilbene-2,2'-disulfonic acid;4,4'-Bis(p-hydroxyphenylazo)-2,2'-stilbenedisulfonic acid;4,4'-Bis[(4-hydroxyphenyl)azo]-2,2'-stilbenedisulfonic acid;4,4''-Vinylenebis(4'-hydroxyazobenzene-3-sulfonic acid);3051-11-4 (Di-hydrochloride salt)
• CAS NO: 91-34-9
• Molecular Formula: C₂₆H₂₀N₄O₈S₂
• Molecular Weight: 580.589
• EINECS: 202-062-6
• Mol File: 91-34-9.mol
• Article Data: 2

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 4,4'-bis[(4-hydroxyphenyl)azo]stilbene-2,2'-disulphonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 4,4'-bis[(4-hydroxyphenyl)azo]stilbene-2,2'-disulphonic acid(91-34-9)
• EPA Substance Registry System: 4,4'-bis[(4-hydroxyphenyl)azo]stilbene-2,2'-disulphonic acid(91-34-9)

Safety Data

• Hazardous Substances Data: 91-34-9(Hazardous Substances Data)

Upstream product

• 108-95-2 phenol 

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