azodye almost exists in all colours as one of the most widely-used synthetic dyestuffs in printing technique (for textiles). it is used for dyeing and printing of natural and synthetic fibres, also for the colouring of paints, plastics and rubber.
when textiles, garments and leather articles come into direct contact with the skin, some azodyes will decompose into arylamines having carcinogenic properties (i.e. carcinogenic azodyes) when they blend with metabolite (perspiration) of human body. however, it presents great hazard if carcinogenic azodyes are absorbed by human bodies. for the purpose of clarity, there are as many as 3,000 azodyes in use and most of them are safe. only about 200 azodyes are forbidden as they can be reduced to release arylamines having carcinogenic properties.
regulations
- eu reach annex xvii
- oeko-tex®standard 100
- china gb 18401 national general safety technical code for textile products
- other related regulations
arylamines having carcinogenic properties
sn | substance | 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 | 5-nitro-o-toluidine | 99-55-8 |
7 | p-chloroaniline | 106-47-8 |
8 | 2,4-diaminoanisole | 615-05-4 |
9 | 4,4′-diaminobiphenymethane | 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′-dimethy1-4,4′-diaminobiphenylmthane | 838-88-0 |
14 | p-cresidine | 120-71-8 |
15 | 4,4′-methylene-bis-(2-chloroaniline) | 101-14-4 |
16 | 4,4′-oxydianiline | 101-80-4 |
17 | 4,4′-thiodianiline | 139-65-1 |
18 | o-toluidine | 95-53-4 |
19 | 2,4-toluylendiamine | 95-80-7 |
20 | 2,4,5-trimethylaniline | 137-17-7 |
21 | o-anisidine | 90-04-0 |
22 | 4-aminoazobenzene | 60-09-3 |
23 | 2,4-xylidine | 95-68-1 |
24 | 2,6-xylidine | 87-62-7 |
c&k testing can provide professional testing for azodyesas per the requirements in different regulations, directives or standards.besides, we can render you one-stop solutions integrating consulting, testing and certification. please feel free to contact if any question. staffed by experienced specialists, c&k testing can assure you of the quality and safety of your products by our professional testing services as per different standards.
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