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Dear Member,

Use of Azo dyes having orthotolidine is banned in textile, leather and coir industries.

The following website gives the llist of banned amines in India

I do not think that there is a official ban in India as for as water testing is concerned. Many field test kits, available in India, are still based on this test., although it should be mentioned that E Merck kit does not use this amine, Files on details of E Merck test strip and quantitative methods are attached.

Technical information on o-toludine is also attached.


Leela Iyengar



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