# Commission Regulation (EC) No 761/2009 of 23 July 2009 amending, for the purpose of its adaptation to technical progress, Regulation (EC) No 440/2008 laying down test methods pursuant to Regulation (EC) No 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) (Text with EEA relevance), Division 2.2: INTERPRETATION OF RESULTS

Extent: E+W+S+N.I.

The OD values obtained with each test sample can be used to calculate the percentage of viability compared to NC, which is set at 100 %. The cut-off value of percentage cell viability distinguishing irritant from non-classified test substances and the statistical procedure(s) used to evaluate the results and identify irritant substances, should be clearly defined and documented, and proven to be appropriate. The cut-off values for the prediction of irritation associated with the validated reference methods is given below:
The test substance is considered to be irritant to skin in accordance with UN GHS category 2:
The test substance is considered to have no category:

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Source: https://www.legislation.gov.uk/eur/2009/761/annex/III/division/2/division/2.2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-761/annex-III/division-2/division-2.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.