What is the equivalent WHMIS symbol for each ChemAlert color?
NFPA (National Fire Protection Association) ChemAlert labelling includes a NFPA symbol, a rectange including 4 diamonds, respectively starting on left side Health (blue), Flammability (red) , Reactivity (yellow)and Special warning (no color). Each diamond either contains no number (non-hazardous) or a number from 1 to 4 NFPA hazard codes.