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Mainly produces a series of intermediate products based on naphthalene and benzene

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PRODUCTS

Diazo 1,2,4 Acid
Synonyms 1-Diazo-2-Naphthol-4-Sulphonic acid or 4-Diazo-3-hydroxy-naphthalene-1-sulphonic acid
Stuctural formular
CAS no 4857-47-0
Molecular weight 250
Molecular Formula

C10H6N2O4S

Specification
Index
Common specification
Appearance
Yellow to light brown moist material
Purity %min.
75
Content by HPLC %min.
95
Insolubles %max.
0.1
Free acid (H2SO4) %max.
2
Fe mg/kg max.
30
Uses It is an important component in azo dyes for
A)After chroming, Mordant black-3, Mordant black-17, Mordant red-7
B)Pre-formed 1:1 metal complex dyes like Acid blue 155,Acid blue 158, Acid blue 158:1, Acid blue 161, Acid red 186, Acid red 201
C)Pre-formed 2:1 metal complex dyes like Acid blue 193, Acid violet 90, Acid violet 92
Packing In HDPE woven sacks with poly liner or in M.S. drums of 50kg to 170kg.

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