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

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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

                  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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