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

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                            PRODUCTS

                            4-hydroxynaphthalene-1-sulphonic acid
                            Synonyms 1-naphthol-4-sulfonic acid(sodium salt)(proverb:NW acid)
                            Domestic patent ZL 97 1 04183.0
                            Structural formula
                            Molecular weight 246.17(sodium salt) 223.17(acid)
                            Molecular Formula

                            C10H8O4S

                            Property

                            C.A number is :6099-57-6. Domestic chemical product catalog number is C0303171. Its industrial product is light off-white powder or paste form solid , easy to dissolve in water, methanol, ethanol, etc.

                            Use This product is azo dye intermediate, uses in the food coloring and for producing direct copper blue BR and 2R, acid red B and acidmordant bordeaux B and so on raw material intermediates.
                            Specification convention

                            Index Name

                            Top Grade Product

                            Qualified Product

                            Appearance

                            White to light off-white powdery solid

                            White to light off-white paste form solid

                            Dissolved state to water

                            Clear bright transparent to almost clear bright transparent

                            Dissolved state to hydrochloric acid

                            Clear bright transparent to almost clear bright transparent

                            1-naphthol-4-sulfonic acid content (Acid)%≥

                            80

                            70

                            Moisture %≤

                            3

                            3

                            Water insolubles %≤

                            0.1

                            0.1

                            1-Naphthylamine-4-sulfonic acid
                            (100% 1-naphthol-4-sulfonic acid計%≤)

                            0

                            0

                            Sulfur dioxide %≤

                            0

                            0

                            Iron ion≤(mg/kg)

                            100

                            100

                            Specification Extra Best Best specification

                            Index Name

                            Extra Top Grade Product

                            Appearance

                            White to light off-white powdery solid

                            Dissolved state to water

                            Clear bright transparent to almost clear bright transparent

                            Dissolved state to hydrochloric acid

                            Clear bright transparent to almost clear bright transparent

                            1-naphthol-4-sulfonic acid content
                            (Acid)%≥

                            87

                            HPLC%≥(λ:280nm)

                            99

                            Moisture %≤

                            0.5

                            Water insolubles %≤

                            0.1

                            1-Naphthylamine-4-sulfonic acid (100% 1-naphthol-4-sulfonic acid)%≤

                            0

                            Sulfur dioxide%≤

                            0

                            Iron ion %≤(mg/kg)

                            100

                            Packing & Storage & Transportation Uses the plastic woven bag inside lining plastic bag, each bag of 25kg, stores in cool, ventilated and dry place, prevent the insolation or the rain drench.

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                            Add:Room 401-418, Building 18, Changjiang Plastics Chemical Market, 600 Tongjiang Middle Road, Xinbei District, Changzhou City
                            E-mail:xinyan_gu@changyuchem.com

                            International Trade:
                            Tel: +86-519-85481997/81187592/85761005
                            Fax: +86-519-85484533/85761018

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                            Tel: +86-519-85481743/85772200/85761002
                            Fax: +86-519-85481030/85761058

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