Chemists, meanwhile, are classifying chemicals for possible use in pharmaceuticals and pesticides.

For help with classifying chemicals that are made up into measured doses or intended for retail sale, you can read our guide on classifying pharmaceutical products.

For more information about what's not covered in this chapter, see our quick reference guide to classifying organic chemicals.

See our guide to classifying organic chemicals for help with classifying vitamins and similar organic compounds that are separately defined.

A mode of action is important in classifying chemicals as it represents an intermediate level of complexity in between molecular mechanisms and physiological outcomes, especially when the exact molecular target has not yet been elucidated or is subject to debate.

Globally Harmonized System (GHS) of Classification and Labeling of Chemicals - a worldwide initiative to promote standard criteria for classifying chemicals according to their health, physical and environmental hazards.

See our guide on classifying organic chemicals.

The CLP, which applies directly in all EU Member States, is changing requirements for manufacturers and importers of chemicals, who must classify and label chemicals according to their health, physical and environmental hazards, based on the UN-agreed Globally Harmonised System (GHS).

See the page on classifying and labelling chemicals in our guide hazardous substance responsibilities for chemical manufacturers.

New EU Regulations are introducing revised requirements requirements for suppliers of chemicals to classify and label chemicals according to their health, physical and environmental hazards.