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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 20708-2006 Limit and determination of parts of harmful substances in textile auxiliaries. In addition to editorial changes, the following main technical changes have been made with respect to GB/T 20708-2006:
——the standard name is modified;
——the applicable scope of this standard is modified (see Clause 1; Clause 1 of Edition 2006);
——the determination method for solid content is modified (see Clause 3; Clause 3 of Edition 2006);
——the control item, limit index and determination method for 4-aminoazobenzene are added (see Clause 3 and 4.2);
——the control items, limit indexes and determination methods for heavy metal elements are modified (see Clause 3 and 4.3; Clause 3 of Edition 2006);
——the determination method for formaldehyde is modified (see 4.4; 4.3 of Edition 2006);
——the control item, limit index and determination method for alkylphenol ethoxylates are added (see Clause 3 and 4.5);
——the control item, limit index and determination method for phthalate are added (see Clause 3 and 4.6);
——the control items, limit indexes and determination methods for perfluorinated compounds are added (see Clause 3 and 4.7);
——the control items, limit indexes and determination methods for organotins are added (see Clause 3 and 4.8);
——the control item, limit index and determination method for polychlorinated phenol are added (see Clause 3 and 4.9).
This standard was proposed by China Petroleum and Chemical Industry Association.
This standard is under the jurisdiction of Technical Committee on Dyestuff of Standardization Administration of China (SAC/TC 134).
The previous edition of this standard is as follows:
——GB/T 20708-2006.
Limit and determination of parts of harmful substances in textile dyeing and finishing auxiliaries
Warning: the personnel using this standard shall be experienced in laboratory work. This standard does not address all of the safety problems. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions.
1 Scope
This standard specifies the limit requirements, test methods, inspection rules and test report for parts of harmful substances in textile dyeing and finishing auxiliaries (see Annex A).
This standard is applicable to all kinds of textile dyeing and finishing auxiliaries used in the dyeing and finishing process of textile products.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 601 Chemical reagent - Preparations of reference titration solutions
GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test methods
GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
GB 19601 Limit and determination of 23 harmful aromatic amines in dye products
GB/T 23972 Determination of alkylphenols and alkylphenol polyethoxylates in textile dyeing and finishing auxiliaries - LC/MS method
GB/T 24101 Limit and determination of 4-aminoazobenzene in dye products
GB/T 24166 Determination of the content of chlorinated phenols in dye products
GB/T 24168 Determination of the content of phthalate in textile dyeing and finishing auxiliaries
GB/T 29493.2 Determination of harmful substances in textile dyeing and finishing auxiliaries - Part 2: Determination of perfluorooctane sulfonates and perfluorooctanoicacid - HPLC-MS/MS method
GB/T 29493.3 Determination of harmful substances in textile dyeing and finishing auxiliaries - Part 3: Determination of organotins - GC/MS method
GB/T 29493.5 Determination of harmful substances in textile dyeing and finishing auxiliaries - Part 5: Determination of free formaldehyde in emulsion polymers
GB/T 33093 Determination of chromium (VI) content in textiles dyeing and finishing auxiliaries
GB/T 34673 Determination of 9 heavy metal contents in textile dyeing and finishing auxiliaries
HG/T 4266-2011 Textile dyeing and finishing auxiliaries - Determination of solid content
HG/T 4446 Textile dyeing and finishing auxiliaries - Determination of formaldehyde in dye fixing agent
3 Limit requirements
The limit of harmful substances in textile dyeing and finishing auxiliaries shall meet those specified in Table 1.
The liquid textile dyeing and finishing auxiliaries are converted according to their solid content mass fraction of 100%. The solid content is determined according to the test method specified in HG/T 4266-2011.
Table 1 Requirements for limit of harmful substances in textile dyeing and finishing auxiliaries
S.N. Item Limit value/(mg/kg)
1 Harmful aromatic amines 1-aminodiphenyl ≤30
Benzidine ≤30
4-chloro-2-toluidine ≤30
2-naphthylamine ≤30
p-chloroaniline ≤30
2,4-diaminoanisole ≤30
4,4'-diaminodiphenylmethane ≤30
3,3'-dichlorobenzidine ≤30
3,3'-dimethoxybenzidine ≤30
3,3′-dimethylbenzidine ≤30
3,3'-dimethyl-4,4'-diaminodiphenylmethane ≤30
p-cresidine ≤30
4,4'-methylene-his(2-chloroaniline) ≤30
4,4'-oxydianiline ≤30
4,4′-thiodianiline ≤30
o-toluidine ≤30
2,4-diaminotoluene ≤30
2,4,5-trimethylaniline ≤30
2-amino-4-nitrotoluene ≤30
o-aminoazotoluene ≤30
o-anisidine ≤30
2,4-xylidine ≤30
2,6-xylidine ≤30
4-aminoazobenzene ≤30
2 Heavy metal elementa Arsenic ≤10
Cadmium ≤5
Cobalt ≤50
Chromium ≤50
Copper ≤125
Mercury ≤4
Nickel ≤50
Lead ≤10
Antimony ≤125
Hexavalent chromium ≤25
3 Formaldehyde ≤750
4 Alkylphenol ethoxylates (APEOs) Octylphenol (OP) ≤100b ≤1 000c
Nonylphenol (NP)
Octylphenol polyethoxylate (OPEO) —
Nonylphenol polyethoxylate (NPEO) —
5 Phthalate easter Dibutylphthalate (DBP) ≤1 000
Butylbenzylphthalate (BBP)
Di-(2-ethylhexyl)-phthalate (DEHP)
Di-n-octylphthalate (DNOP)
Di-iso-nonylphthalate (DINP)
Di-isodecylphthalate (DIDP)
6 Perfluorinated compounds (PFCs) Perfluorooctane sulfonate (PFOS) ≤50
Perfluorooctanonic acid (PFOA) ≤50
7 Organotins Monobutyltin (MBT) ≤5
Dibutyltin (DBT) ≤20
Tripropyltin (TPT) ≤5
Tributyltin (TBT) ≤5
8 Chlorinated phenols Tetrachlorphenol (TeCP) ≤20
Pentachlorphenol (PCP)
a Requirements are not proposed for antimony (Sb), arsenic (As) and lead (Pb) indexes of products with flame retardant function.
b The content of octylphenol (OP) and nonylphenol (NP) is less than or equal to 100mg/kg.
c The content of octylphenol (OP), nonylphenol (NP), octylphenol polyoxyethylene ether (OPEO) and nonylphenol ethoxylates (NPEO) is less than or equal to 1 000mg/kg.
4 Test methods
4.1 General requirements
Unless otherwise specified, only recognized analytical reagent and Grade 3 water (specified in GB/T 6682-2008) shall be used. Unless otherwise specified, the standard volumetric solutions, preparations and products used in the test shall be prepared and calibrated according to the requirements of GB/T 601 and GB/T 603. Judgment of the inspection result shall be carried out according to the rounding-off value comparison method specified in GB/T 8170-2008, 4.3.3.
4.2 Determination of harmful aromatic amines
4-aminoazobenzene is determined according to the requirements of GB/T 24101, and the remaining 23 harmful aromatic amines are determined according to the requirements of GB 19601.
4.3 Determination of heavy metal elements
Hexavalent chromium is determined according to the requirements of GB/T 33093, while the remaining 9 heavy metal elements are determined according to the requirements of GB/T 34673.
Foreword i
1 Scope
2 Normative references
3 Limit requirements
4 Test methods
5 Inspection rules
6 Test report
Annex A (Normative) List of harmful substances
