Direct brown 44 is a good dyeing agent for cotton fabrics.
2 moles of nitrous acid treatment with 3 moles of Benzene-1,3-diaminedihydrochloride (This product may be based on the disazo dye mixture as the main ingredient, and commercial dyes are usually composed by a dihydrochloride). And its product (C.I. Basic Brown 1, C.I. 21000)as coupling component and diazotized 4-Aminobenzenesulfonic acid (2 mol) coupling
Properties and Applications
brown. Soluble in water for brown, soluble in ethanol and acetone. The strong sulfuric acid for palm to black, diluted for orange brown, there is a fine precipitation. The dye solution to join 10% sodium hydroxide solution more red light. Apply to the cellulose fibre paper printing and dyeing and color.
|
Standard
|
Acid Resistance
|
Alkali Resistance
|
Light Fastness
|
Soaping
|
Water
|
|
Fading
|
Stain
|
Fading
|
Stain
|
|
ISO
|
4
|
5
|
2
|
2
|
|
2
|
|
|
AATCC
|
3-4
|
4
|
2
|
1-2
|
|
2-3
|
|
[1] Sawada K, Ueda M. Adsorption behavior of direct dye on cotton in non-aqueous media[J]. Dyes and pigments, 2003, 58(1): 37-40.
