Click here to go back to the previous page


2020 Proficiency Test (PT) on AZO Dyes in Textile started


The letter of instructions can be downloaded here as a pdf document. To download a document, please click the right mouse button and choose the "save as" option.


 Please download the instructions for the PT iis20A04 here: the letter of instructions and the report form here



Summary of this proficiency test:


On 4 March 2020 the proficiency test on AZO Dyes in Textile started with 159 participants from 30 different countries. On that date, the samples were dispatched to the laboratories.

Please confirm sample receipt as soon as you have received and checked the contents of the sample package via Please enter the date of receipt and press the "save date" button.


The samples can be analyzed on: 24 forbidden Aromatic Amines.


The deadline for reporting results is set on 10 April 2020. A laboratory that reports test results after the deadline will definitely not get direct feedback in case any of its results are suspect! So be in good time to get the most out of this proficiency test.

The test results should be reported via our internet based results reporting platform A login and a password can be requested via email to





©1996-2023 Institute for Interlaboratory Studies