Available now: September 2025 Categorisation Guidelines

We have released the September 2025 Industrial Chemicals Categorisation Guidelines, including an updated list of chemicals with high hazards for categorisation. We also updated our online Guide to categorising your chemical importation and manufacture to reflect the changes that take effect on 1 September 2025. These changes are part of our continuous efforts to improve categorisation.     

These annual updates take effect on 1 September each year to coincide with the AICIS registration cycle. We announced changes to the Categorisation Guidelines in February this year.

What’s different from the September 2024 Categorisation Guidelines

Chemicals added to the list of chemicals with high hazards for categorisation (the list)

We added 118 entries to the list that introducers may need to use when working out their introduction’s risk to human health and the environment.

In February 2025, we announced that 120 chemicals would be added to the list following public consultation on the September 2025 Guidelines.

Since then, two chemicals (CAS numbers 395058-31-8 and 395058-32-9) have been removed from the original overseas source of information. As a result, these 2 chemicals are not included in the final list.

Minor changes include removal of outdated references to discontinued sources from the list.

Learn about the list and download 

Minor edits (no change to regulatory requirements)

• Skin corrosion (part 6.12.2) – minor clarification about information required to demonstrate absence of this hazard characteristic.
• Skin sensitisation (part 6.14.2) – minor clarification about information required to demonstrate absence of this hazard characteristic.
• Part 8.1 List of chemicals with high hazards for categorisation -improved clarity in descriptions of information sources.
• Part 8.4.1 Acceptable test guidelines for human health hazard characteristics – table amended because it incorrectly implied that the OECD Environment, Health and Safety Publications Series on Testing and Assessment No. 129, Guidance Document on Using Cytotoxicity Tests to Estimate Starting Doses For Acute Oral Systemic Toxicity Tests (2010), is an OECD test guideline.
• Improved formatting for accessibility and consistency with other AICIS publications.
• Renamed the document to avoid confusion with the versioned “Guide to categorising your chemical importation and manufacture”.
• Reorganised footnotes to eliminate repetition.

How to categorise your introduction using the latest Guidelines  

If you're categorising a chemical introduction, continue using our online Guide to categorising your chemical importation and manufacturer (version 3.4). This comprehensive guide incorporates the latest Rules and Guidelines on categorisation.

Alternatively, you can download the September 2025 Industrial Chemicals Categorisation Guidelines, which must be read in conjunction with the Industrial Chemicals (General) Rules 2019.