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. 2019 Apr 29;27(6):778–790. doi: 10.1016/j.jsps.2019.04.014
S.N. Category Score
1. Non-irritant 0.00–0.90
2. Slightly irritant 1.00–4.90
3. Moderately irritant 5.00–8.90
4. Strongly irritant 9.00–21.00.