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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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