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

        +中文版+   +ENGLISH+

        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

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

        Copyright(C)2019, Changzhou Chungang Chemical Co., Ltd. All Rights Reserved. Supported by ChinaChemNet ChemNet Toocle Copyright Notice 備案字號:蘇ICP備11031745號

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