The NEW version of OptiSafe is called OS2.
Like OptiSafe, OS2 also has a zero FN rate; however, OS2 also has a low FP rate and accuracy over 90%.
The New Formulation has significantly reduced the FP rate without increasing the FN rate:
Based on the total number of chemicals tested from a previous OptiSafe validation study and an expanded number of ocular corrosives and surfactants for the NC versus other irritant classes (GHS categories 2B/A and 1), the FP rate was 19.1% (9/47), the FN rate was 0.0% (0/86), and the accuracy was 93.2% (124/133).
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