This standard specifies the requirements, sampling, test methods, inspection rules, signs, labels, packaging, transportation and storage of Acid Blue N-2R (CI Acid Blue 225) products. This standard applies to product quality control of Acid Blue N-2R.
HG/T 4431-2012 Referenced Document
GB 19601 Limit and determination of 23 harmful aromatic amines in dye products*, 2013-09-06 Update
GB 20814 Limit and determination of the quantity of heavy-metal elements in dye products*, 2014-07-24 Update