Alias：nafto as-d

English Name：naphthol as-d

Index number：c.i.azoic coupling component 18 (37520)

Molecular formula：c18h15no2

Structural formula：

Molecular weight: 277

Appearance：beige powder

Content：≥98.5%

Color light: similar to the standard

Strength, score：Standard 100±three

Melting point of dry product：194℃

2.3 acid content：≤0.1%

Content of insoluble impurities in lye:≤0.15%

Uses: it is mainly used as a base agent for dyeing and printing of cotton fabric, and as an intermediate of fast pigment and organic pigment.