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AZO (Azo Dyes) Detection

1. What is AZO (Azo Dyes)?

AZO (Azo dyes) are the most widely used class of synthetic dyes in textile printing and dyeing processes, used for dyeing and printing a variety of natural and synthetic fibers, and also for coloring paints, plastics, rubber, etc.

2. Hazards of AZO (Azo Dyes):

Under specific conditions, they can decompose to produce more than 20 carcinogenic aromatic amines, which can alter human DNA structure through activation, leading to diseases and inducing cancer. Azo dyes are currently the largest category of dyes. During production and application, about 10%-15% of dyes are discharged into the environment untreated and may severely affect the health of those exposed.

3. AZO (Azo Dyes) Test Items:

No.	Aromatic Amine Name	CAS No.
1	4-Aminobiphenyl	92-67-1
2	Benzidine	92-87-5
3	4-Chloro-o-toluidine	95-69-2
4	2-Naphthylamine	91-59-8
5	o-Aminoazotoluene	97-56-3
6	2-Amino-4-nitrotoluene	99-55-8
7	p-Chloroaniline	106-47-8
8	2,4-Diaminoanisole	615-05-4
9	4,4'-Diaminodiphenylmethane	101-77-9
10	3,3'-Dichlorobenzidine	91-94-1
11	3,3'-Dimethoxybenzidine	119-90-4
12	3,3'-Dimethylbenzidine	119-93-7
13	3,3'-Dimethyl-4,4'-diaminodiphenylmethane	838-88-0
14	3-Amino-p-cresol methyl ether (p-Cresidine)	120-71-8
15	4,4'-Methylene-bis-(2-chloroaniline)	101-14-4
16	4,4'-Diaminodiphenyl ether	101-80-4
17	4,4'-Diaminodiphenyl sulfide	139-65-1
18	o-Toluidine	95-53-4
19	2,4-Diaminotoluene	95-80-7
20	2,4,5-Trimethylaniline	137-17-7
21	o-Anisidine	90-04-0
22	4-Aminoazobenzene	60-09-3