m-Phenylenediamine|1,8-Diaminonaphthalene|1,5-Diaminonaphthalene--Changzhou Chungang Chemical Co., L

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.

[ BACK ]