Final answer:
The differences between WHMIS 1988 and WHMIS 2015 supplier labels include changes in color coding, hazard categories, and precautionary measures.
Step-by-step explanation:
The differences between WHMIS 1988 and WHMIS 2015 supplier labels include changes in color coding, hazard categories, and precautionary measures. In WHMIS 1988, the labels used a color-coded system with different colors indicating specific hazards. However, in WHMIS 2015, the labels use standardized pictograms to represent different hazards. The hazard categories have also been updated in WHMIS 2015 to align with the Globally Harmonized System of Classification and Labelling of Chemicals (GHS). Lastly, the precautionary measures on the labels have been revised to include more specific information about handling, storage, and emergency procedures.