Naphthol AS-BS
Structural Formula:
Name: 2-hydroxy-3-naphthoic acid m-nitroanilide
Molecular formula: C17H12O4N2
Molecular weight: 308.3
Quality Standards of Naphthol AS-BS
Description
|
Specification
|
Appearance
|
light yellow even powder
|
Shade and strength when coupling with Naphthol As on cotton fibre
|
similar to the standard
|
Primary melting point of the dried
|
≥ 242 ℃
|
Insoluble matter in alkali
|
≤ 0.5%
|
Percentage of screenings(80 mesh)
|
≤ 0.5%
|