Appearance:white to buff or pink uniform powder
Purity%≥98.0
Alkali insoluble matter%≤0.1
Initial melting point ≥247.2
2-hydroxy-3-naphthoic acid%≤0.1
Uses: A grounding agent for dyeing and printing on cotton and viscous textile,also used in manufacture of rapid fast dyestuffs and organic pigments.