Product Introduction
Acid yellow 250 CAS# 93859-32-6 is a coumarin dye with the appearance of yellow powder. It dissolves in water. The water solution shows fluorescent greenish yellow color.
Mainly used in the dyeing and printing of wool and nylon/polyamide.
pH3.0-4.0 recommended for the dyeing of nylon/polyamide.
Physical and Chemical Parameters
|
Appearance |
Yellow Powder |
|
pH Value ( 1% Water Solution) |
6.30-8.30 |
|
Strength |
98%-101% |
|
Color Difference CMC (2:1) |
≤0.50 |
|
Moisture |
≤8.00% |
|
Insoluble |
≤0.200% |
|
Solubility (90℃) |
≥80g/l |
|
Degree of Fineness (200um) |
≤8 |
|
Dust-Proof Performance |
≥2 |
Fastness Properties (Polyamide)
|
DYEING DEPTH (O.W.F) |
LIGHT (XENON) |
WASHING (50℃) |
PERSPIRATION (ALKALI) |
RUBBING |
WATER |
|
1% |
1/1 |
CH PA CO |
CH PA CO |
(DRY) (WET) |
CH PA CO |
|
3-4 |
4 5 5 |
4-5 3 2-3 |
5 5 |
5 4 5 |
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