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

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

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