This is the second part of a three-part series explaining the technicalities of product toxicity labelling. This instalment will explain how to interpret product Safety Data Sheets (SDSs) and product warning labels.

Chemicals can be identified via a number of different pathways. The chemical databases referred to in part one and SDSs will typically include either CAS or UN numbers or both. A Chemical Abstract Service Number (CAS Number) is a numerical designation assigned to a single chemical. Mixtures can also be assigned…