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Synonyms |
1-naphthol-4-sulfonic acid(sodium salt)(proverb:NW acid) |
|
Domestic patent |
ZL 97 1 04183.0 |
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Structural formula |
 |
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Molecular weight |
246.17(sodium salt) 223.17(acid) |
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Molecular Formula |
C10H8O4S
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|
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.
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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. |
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Specification |
convention
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Index Name
|
Top Grade Product
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Qualified Product
|
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Appearance
|
White to light off-white powdery solid
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White to light off-white paste form solid
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Dissolved state to water
|
Clear bright transparent to almost clear bright transparent
|
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Dissolved state to hydrochloric acid
|
Clear bright transparent to almost clear bright transparent
|
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1-naphthol-4-sulfonic acid content (Acid)%≥
|
80
|
70
|
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Moisture %≤
|
3
|
3
|
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Water insolubles %≤
|
0.1
|
0.1
|
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1-Naphthylamine-4-sulfonic acid
(100% 1-naphthol-4-sulfonic acid計%≤)
|
0
|
0
|
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Sulfur dioxide %≤
|
0
|
0
|
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Iron ion≤(mg/kg)
|
100
|
100
|
|
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Specification |
Extra Best Best specification
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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
|
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HPLC%≥(λ:280nm)
|
99
|
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Moisture %≤
|
0.5
|
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Water insolubles %≤
|
0.1
|
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1-Naphthylamine-4-sulfonic acid (100% 1-naphthol-4-sulfonic acid)%≤
|
0
|
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Sulfur dioxide%≤
|
0
|
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Iron ion %≤(mg/kg)
|
100
|
|
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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. |
