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E-mail：slj@huiwangchem.com
Fax：0086-571-82855089
Intermediate
J Acid(2-Amino-5-naphthol-7-sulfonic acid)
Name: 2-Amino-5-naphthol-7-sulfonic acid
The drt of J-acid is grey powder,difficultly soluble in water.Easily soluble alkali-creating correspondence salt.The liquid of its’sodium salt is blue fluorescence.It’s the chlorine compound of J acid is acicular yellow crystal,soluble in water,can be coupled to purple dyes by itself when in the sodium carbonate solution.
Formula Weight:239.25
Molecular Formula:C10H9NO4S
Usage:J acid is one of the important dyestuff intermediates.It is used for production many dyes as the material,such as direct copper blue 151,direct scarlet 23,reactive Brown K3R,carbonyi-j-acid and Bis-J-Acid etc.
Product quality standards:
| Index | Specification |
| Appearance | grey to light brown powder |
| Content，% ≥ | 90.0 |
| Purity(HPLC)，% ≥ | 97.0 |
| Acid-Calculation by 100% J acid%，% ≤ | 1.5 |
| Bis J Acid-Calculation by 100% J acid%，%≤ | 0.2 |