Division 2.2 INTERPRETATION OF RESULTS
United Kingdom
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: