Naphthol AS (CAS 92-77-3) is a lght yellow crystals, soluble nitrobenzene, slightly soluble in ethanol, insoluble in water and soda solution, soluble in caustic soda solution was yellow. It is mainly used in the production of organic pigments and for cotton fiber, viscose fiber and part of the synthetic fiber dyeing, and printing.
Specification
Appearance off-white power
Assay ≥99%
Color light Near to standard substance
Intensity, molecule 100±5 of standard substance
Melting point(dry product) 247°C
2.3 acid content: ≤0.09%
Unsoluble substance content in basic liquor ≤0.15%
Application
Naphthol AS can be used as intermediates of organic pigment
Packing
25kg/bag
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