dye|World dye variety

Name:C.I.Acid Brown 21

Molecular Structure: Single azo,Metal Complexes

C.I.Acid Brown 21,CAS 61724-04-7,414.44/407.83,C19H18N4O5S,C16H14ClN5O4S,Acid Brown NM-3RBL,Neutral Brown BRL

Molecular Formula:C₁₉H₁₈N₄O₅S/C₁₆H₁₄ClN₅O₄S

Molecular Weight: 414.44/407.83

CAS Registry Number: 61724-04-7

Manufacturing Methods :   3-Amino-4-hydroxy-N-methylbenzenesulfonamide diazo, and N-(7-hydroxynaphthalen-1-yl)acetamide coupling, and the other will be 3-Amino-4-hydroxybenzenesulfonamide diazo, and 1-(4-Chlorophenyl)-3-methyl-1H-pyrazol-5(4H)-one coupling, and then turn it into 1:2 chromium complex.

Properties and Applications:  red light brown. Brown powder. The strong sulfuric acid for red sauce, diluted solution for red brown; No change in strong hydrochloric acid, diluted into shallow brown solution, and the precipitation; In the nitric acid for brown, sediment can dilute; In the thick of sodium hydroxide solution no change after dilute for brown. Water solution is brown. General for loose hair, tops and article polyamide, less used alone. Also used PVA fabric and dimension / cotton, wool / rayon blended fabric dyeing and printing, but also for leather dyeing.

List of Suppliers:

Acid Brown NM-3RBL,Neutral Brown BRL

Qingdao Double Peach Specialty Chemicals (Group) Co., Ltd.,

Hangzhou Xiasha Hengsheng (Sunshine) Chemicals Co.,Ltd.

Shangyu Guangming Chemical Co.,Ltd.