Mainly used in the production of water reducer, dispersant , phthalic anhydride, a variety of naphthol, naphthylamine, etc., is the raw materials for production of synthetic resin, plasticizers, rubber antioxidant, surfactant, synthetic fibers, dyes, paints, pesticides, , Pharmaceutical
Parameters (GB/T6700-86):
|
NO
|
Item
|
Premium grade
|
High-class product
|
Conforming
|
|
1
|
Naphthalin content %
|
98
|
97
|
95
|
|
2
|
Colour
|
white, Reddish or yellowish powder, flake
|
||
|
3
|
Crystallization point ℃-(above)
|
78.3
|
78
|
77.5
|
|
4
|
Nonvolatile % (less)
|
0.04
|
0.06
|
0.08
|
|
5
|
Ash content % (less)
|
0.01
|
0.01
|
0.02
|
|
6
|
Package
|
50±0.5KG/bag(coextruded film +weave bag) |
||