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By certification 
Product Name:Naphthol AS-OL
Alias:2-HYDROXY-3-NAPHTHOIC ACID O-ANISIDIDE
C.I. 37530
CAS: 135-62-6
Chemical Formula：C18H15NO3
Appearance: Light beige brown powder
Color shade(with standard):similar
Strength:100±3%
Purity:≥98%
Melting point:≥160℃
Insoluble in Alkali:≤0.5%
BON acid content:≤0.2%
Residue on 60M sieve:≤5%
Usage: This product is mainly used as organic pigment intermediate. It can produce pigment red 9, 15, 119, 243, 261, 266, pigment orange 4.
This product can also be used for cotton yarn, cotton cloth, cotton knitted fabric, towel, bath towel, vinylon, viscose, silk, cotton and nylon two acetate fiber cotton dyeing and printing, dyeing printing, direct printing. It can also be used in the manufacture of fast - color, fast - amine, fast - and organic pigments. Low affinity for cotton, medium coupling capacity.
Safety is the lifeblood of an enterprise. We strictly implements the national guidelines on safety production-- "safety first, precaution crucial and comprehensive treatment".We have set up the concept of safe development, and carried forward the idea of “life first, safety first”.We have been providing a strong guarantee for the safety and health of our employees.
http://www.naphtholas.com/
