Direct Brown 34
Name:C.I.Direct Brown 34
Molecular Structure: Stilbene Class
Molecular Formula:
Molecular Weight:
CAS Registry Number:1325-70-8
Manufacturing Methods : 2-Methyl-5-nitrobenzenesulfonie acid condensation product with a self-condensation of Benzene-1,4-diamine. That was 2-Methyl-5-nitrobenzenesulfonie acid sodium hydroxide solution to the backflow and Benzene-1,4-diamine common heating, its molecular ratio is 2:1. Its product (C.I. Direct Orange 28, C.I. 40065) diazo, and 4-Hydroxy-6-(phenylamino)naphthalene-2-sulfonic acid in alkaline conditions coupled.
Properties and Applications: brown. Soluble in water for the opacity of the yellow light brown, not soluble in ethanol and acetone. The strong sulfuric acid for black purple, for green light brown after diluted. Dyes to dilute sulphuric acid solution turn dark; Add thick sodium hydroxide solution unchanged.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 2-3 | 3 | 2 | 4 | 4 | ||
| AATCC | 3 | 3 | |||||
List of Suppliers:
Diphenyl Fast Brown ( Geigy Co. Ltd )
Diphenyl Fast Brown GN(Classic Dyestuffs Inc)