eCFR :: 29 CFR 1910.1200 -- Hazard communication. (d) And data on toxicity for A and C are available and substantially equivalent; i.e., they are in the same hazard category and are not expected to affect the toxicity of B; then . If mixture (i) or (ii) is already classified based on test data, the other mixture can be assigned the same hazard category. A.0.5.1.6 Aerosols.