GOTS specifically prohibits the use of any chemical input that releases carcinogenic arylamine compounds MAK III categories 1,2,3,4. This includes Aniline which is classified as MAK III Category 4 chemical.
However, Aniline serves as the basis of the synthetically produced dye indigo. In bound form, Aniline is not carcinogenic and consequently not harmful to consumers because it is firmly bound in the crystal lattice of the dye.
GOTS recognises that even when the material is produced to GOTS standards, there could be the possibility of unintended or unknown sources of contamination, which is why residue limits for certain chemicals have been specified for GOTS Goods. Given these circumstances, GOTS feels that their residual, unintended use limit of 100 mg/kg, with current understanding and knowledge, is adequate to ensure safety of consumers and in line with its larger philosophy of sustainability.
The complete GOTS Information on Aniline is available for download here.