Rotterdam Convention rules for hazardous chemical exports
The Rotterdam Convention controls trade in listed hazardous chemicals through prior informed consent, not a global ban. GB exporters face separate rules.
The Rotterdam Convention is a treaty that controls international trade in certain hazardous chemicals and pesticides through prior informed consent (PIC). It does not impose a worldwide ban. Importing Parties decide whether to accept listed chemicals, refuse them or set conditions. Exporting Parties must ensure exports respect those decisions. The Convention's overview explains its purpose and information-exchange duties.
For a Great Britain exporter, checking the treaty list is only part of the job. The GB PIC regime has its own chemical lists, notification requirements and consent rules. A treaty listing alone cannot tell you whether a particular shipment can leave GB.
Which chemicals does Annex III cover?
Annex III covers industrial chemicals, pesticides and severely hazardous pesticide formulations. It is not a complete list of hazardous substances or national chemical bans. Check the official Annex III list for the exact entry, including its category and any formulation limits.
Two additions took effect on 22 October 2025:
- Carbosulfan, listed as a pesticide.
- Fenthion ultra-low-volume formulations at or above 640 g active ingredient/L, listed as a severely hazardous pesticide formulation.
The second entry does not cover all fenthion formulations. The official list gives 21 July 2026 as the import-response deadline for these additions. That date has passed. Governments had to respond by then. Businesses should not treat it as an export deadline or assume the deadline itself grants permission to ship. Both the scope and dates appear on the current Annex III page.
A national restriction does not automatically add a chemical to Annex III. For banned or severely restricted chemicals, notifications from two specified PIC regions trigger consideration. Severely hazardous pesticide formulations have a separate proposal route for problems under conditions of use in developing countries or countries with economies in transition. The Convention overview describes these routes.
How the prior informed consent procedure works
The PIC procedure gives importing governments information and a formal way to state their decisions. A Decision Guidance Document accompanies an Annex III listing. Parties have nine months after its circulation to prepare an import response, according to the official procedure.
A response can give consent, refuse consent or permit import subject to conditions. It can also be an interim response. Do not read every interim response as permission, or treat silence as automatic consent. Check the destination's actual response for the relevant chemical and category through the PIC procedure page.
The Secretariat circulates import responses in the PIC Circular every six months and makes them available online. Exporting Parties must ensure exports do not contravene the importing Party's decision. A response for one destination does not establish permission for another. The procedure guidance sets out these responsibilities.
Import decisions must also be trade-neutral. A refusal must apply to imports from every source, including non-Parties, and to domestic production for domestic use. A supplier's location outside the Convention does not exempt its shipments from the destination's refusal. See the rules on import responses.
Export notification is not consent
Export notification is a separate information-exchange mechanism. At treaty level, it concerns chemicals banned or severely restricted in the exporting Party. Notification is required before the first shipment and annually thereafter. The Convention also addresses export labelling and up-to-date safety data sheets for relevant occupational-use exports. These duties do not, by themselves, establish permission to ship. See the Convention overview.
Check the destination's import decision separately from the exporter's duties under domestic rules. For GB exports, HSE's export guidance explains notification and consent requirements. Completing a notification does not replace the applicable consent check.
What GB exporters must check
HSE is Great Britain's designated national authority. GB PIC applies to exports from GB, including exports to EU countries and movements to Northern Ireland. Under the Windsor Framework, EU PIC continues to apply in Northern Ireland. Exports from NI, including movements to GB, follow EU PIC. The distinction is geographical, so do not treat “UK” and “GB” as interchangeable in an export procedure. See HSE's explanation of the regimes.
Start with the HSE chemical list, labelled August 2026. Its parts have different consequences:
| GB list part | What it means |
|---|---|
| Part 1 | Chemicals subject to export notification. |
| Part 2 | Chemicals that also require importing-country consent and qualify for PIC notification. |
| Part 3 | Chemicals also listed in treaty Annex III, subject to notification and the PIC procedure. |
| Part 4 | Persistent organic pollutants subject to export bans. |
| Part 5 | Other chemicals subject to export bans. |
These are sections of the GB list, not five parts of treaty Annex III. Use the actual GB entry rather than assuming its treatment from the international listing. HSE's list page also links a notice of changes from 28 August 2026. For a substance-specific implementation date, check the amending act itself.
The carbosulfan and fenthion additions show why the dates need separate checks. Their treaty entry into force was 22 October 2025. That date does not establish when a GB export requirement began or which GB list part applies. Match the exact substance or formulation against the current HSE entry before planning the shipment. Keep the international listing and the GB listing as separate checks in the export review, even when both refer to the same chemical.
Allow time for notification
For exports within scope, HSE requires notification at least 35 days before the first export in a calendar year. The requirement applies to each relevant substance, mixture or article and each importing country. Repeat it before the first export in subsequent years. One qualification matters for EU trade: a single notification covers exports of that product to EU member states or supply to NI. See HSE's exporting guidance.
Check the correct consent route
HSE seeks explicit consent on behalf of the GB exporter. Consent can carry conditions or restrictions, and it may be refused. For Part 2 and Part 3 chemicals, Article 14(6)(a) provides an explicit-consent route. See HSE's guidance and Article 14.
For Part 3, Article 14(6)(b) provides another route: the latest Secretariat circular indicates the importing Party's consent. A fresh individual consent request is therefore not required for every Part 3 export. This route is specific to Part 3. A positive PIC import response is not a blanket substitute for explicit consent for Part 2. Check the applicable route in Article 14 before treating consent as settled.
Does the Rotterdam Convention cover asbestos?
The current Annex III lists actinolite, amosite, anthophyllite, crocidolite and tremolite asbestos as industrial chemicals. Chrysotile is not on that list. Those distinctions make both “Rotterdam bans asbestos” and “all asbestos is covered” misleading descriptions. Use the current Annex III entries to check the type of asbestos concerned.
Chrysotile's absence does not establish safety or permission to trade. In GB, check the domestic PIC list separately rather than using treaty non-listing as export clearance.
Is the United States a Party?
The United States signed the Convention on 11 September 1998 but is not a Party, according to the UN depositary status table dated 4 November 2026. US non-membership does not override an importing Party's refusal. The Convention's trade-neutral import decisions also apply to imports from non-Parties, including the United States.
RegAffairs AI's answer on the Rotterdam Convention and GB PIC provides a citation-backed explanation of the two regimes. For a GB shipment, use HSE's export guidance to check notification and the applicable consent route.