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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