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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