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| 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
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| 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 |
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| 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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