Change of https://www.gov.uk/government/publications/drug-precursor-chemicals-category-and-cn-codes

Change description : 2026-09-17 09:27:00: Added 9 chemicals to category 1. [Guidance and regulation]

Showing diff : 2026-06-28 23:02:57.522034019 +00:00..2026-09-17 08:28:06.866763944 +00:00

Guidance

Drug precursor chemicals: category and CN codes

Categories and combined nomenclature (CN) codes of precursor chemicals in the UK.

From:
Home Office
PublishedPublished:
8 May 2026
Last updatedupdated:
29
17 JuneSeptember 2026 — See all updates

Documents

Drug precursor chemicals: category and CN codes

HTML

Details

This document shows the regulation of precursor chemicals in the UK, which are divided into 4 categories.

It is general guide only and should not be taken as a replacement for the relevant regulations and guidelines.

For enquiries email dflu@homeoffice.gov.uk.

Updates to this page

Published 8 May 2026
Last updated 2917 JuneSeptember 2026 — Show all updates

  1. Added 9 chemicals to category 1.

  2. List updated to reflect changes in legislation.

  3. First published.

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Update history

2026-09-17 09:27
Added 9 chemicals to category 1.

2026-06-29 00:01
List updated to reflect changes in legislation.

2026-05-08 11:01
First published.