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Worldtest(GuangDong)Co., Ltd.
Address: Rooms 201 and 102，Building 6，No.6,North Industrial Road.Songshan Lake(SSL), Dongguan, Guangdong, China
Telphone:：0769-22891258
FaX:0769-22891235
Emaile:service.vip@worldtest.cn
Website:www.worldtest.cn
www.worldtest.com.cn
Introduction to testing
In the molecular structure of dyes, those containing azo groups (-N=N-) are collectively referred to as azo dyes. Often connected with one or more aromatic ring systems to form a conjugated system as the color body of the dye, distributed in almost all colors. Azo dyes are widely used in the dyeing and printing process of textiles, clothing, leather products, household fabrics, etc. .
When textiles, clothing and leather products are in direct contact with the human body, certain types of azo dyes mix with normal human metabolites (such as sweat) and undergo a reduction reaction to form carcinogenic The aromatic amine compound is then absorbed by the human body, which is extremely harmful to the human body. These azo dyes are carcinogenic azo dyes.
Test Ability
|
Serial number |
Substance name |
CAS.NO. |
|
1 |
O-toluidine |
95-53-4 |
|
2 |
2,4-dimethylaniline |
95-68-1 |
|
3 |
2,6-Dimethylaniline |
87-62-7 |
|
4 |
anthranil |
90-04-0 |
|
5 |
p-Chloroaniline |
106-47-8 |
|
6 |
2,4,5-trimethylaniline |
137-17-7 |
|
7 |
2-Methoxy-5-methylaniline |
120-71-8 |
|
8 |
4-Chloro-o-toluidine |
95-69-2 |
|
9 |
2,4-Diaminotoluene |
95-80-7 |
|
10 |
2,4-Diaminoanisole |
615-05-4 |
|
11 |
2-Naphthylamine |
91-59-8 |
|
12 |
4-Aminobiphenyl |
92-67-1 |
|
13 |
4,4-Diaminodiphenyl ether |
101-80-4 |
|
14 |
Benzidine |
92-87-5 |
|
15 |
4,4-Diaminodiphenylmethane |
101-77-9 |
|
16 |
3,3-Dimethyl-4,4-diaminodiphenylmethane |
838-88-0 |
|
17 |
3,3-Dimethylbenzidine |
119-93-7 |
|
18 |
4,4-Diaminodiphenyl sulfide |
139-65-1 |
|
19 |
3,3-Dichlorobenzidine |
91-94-1 |
|
20 |
3,3-Dimethoxybenzidine |
119-90-4 |
|
21 |
4,4-methylene-bis-(2-chloroaniline) |
101-14-4 |
|
22 |
O-aminoazotoluene |
97-56-3 |
|
23 |
5-Nitro-o-toluidine |
99-55-8 |
|
24 |
4-Aminoazobenzene |
60-09-3 |
Applicable standards
|
EN 14362-1:2012 |
Tests for banned azo dyes in textiles |
|
EN 14362-3:2012 |
Textile 4-aminoazobenzene test |
|
LFGB §64 BVL B 82.02-4:2013 |
Detection method for banned azo dyes in polyester for daily necessities |
|
LFGB §64 BVL B 82.02-2:2013 |
The detection method of azo dyes forbidden in textiles for daily necessities testing |
|
LFGB §64 BVL B 82.02-9:2008 |
Commodity testing banned azo dye-tetraaminoazobenzene testing method |
|
GB/T 17592-2011 |
Test of banned azo dyes in textiles |
|
GB/T 23344-2009 |
Textile 4-aminoazobenzene test |
|
ISO 17234-1:2010 |
Leather banned azo dye test |
|
ISO 17234-2:2011 |
Leather 4-aminoazobenzene test |
|
GB/T 19942-2005 |
Determination of banned azo dyes in leather and fur chemical tests |
|
GB 19601-2013 |
Limits and determination of 23 harmful aromatic amines in dye products |
|
GB/T 24101-2009 |
Limit and determination of 4-aminoazobenzene in dye products |
Test requirements
|
Sample type |
Textiles, leather, dyes, etc. |
|
Sample size |
not less than 20g |
|
Textile products |
1. If the textiles are semi-finished products, such as yarns, fabrics, etc., samples need to be cut from the above products. |
|
2. If the product is composed of several textiles, such as clothing; it is necessary to cut samples from all parts that directly and Pocket fabric, product label, drawstring, zipper, imitation fur, sewing thread. |
|
|
3. If the quality of some parts (logo, sewing thread, small size embroidery) is less than 1g, collect the same parts until it reaches 1g. |
|
|
4. If the mass of these materials is less than 0.5g, the results are uncertain, and more samples can be requested for confirmation. |
|
|
5. If the quality of these parts is less than 0.2g, they will not be tested. |
|
|
6. Cut out the embroidery part together with the base fabric. |
|
|
dyed textiles |
1. All colors of the sample should be tested. (White samples do not need to be tested) |
|
2. If multiple color samples are easier to separate colors and cut, they can be mixed and tested, and a maximum of three colors are allowed to be mixed. 2.1 Multiple colors should be selected from the same part first; 2.2 If 2.1 cannot be met, try to select from the same fabric; 2.3 If the above 2.1 and 2.2 conditions cannot be met, it should be selected from the same technology; 2.4 Cut out the similar mass of each color and weigh 1g; 2.5. If the test result of any aromatic amine in the mixed sample is between 5mg/kg and 30mg/kg It must be tested separately by color. |
|
|
3. If a variety of color samples are inseparable by physical methods or difficult to separate and cut, mixed testing shall be adopted. Sampling should be based on color composition and ratio. |
Test cycle< /strong>
|
General test cycle |
5WD |
|
Expedited testing cycle |
3WD (Leather 4 WD) |
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