The Rotterdam Convention is an international treaty that operates a Prior Informed Consent (PIC) procedure for trade in certain hazardous chemicals and pesticides. Adopted in 1998 and entered into force on 24 February 2004, the convention is jointly administered by the United Nations Environment Programme (UNEP) and the Food and Agriculture Organization (FAO). The convention currently lists 55 chemicals on Annex III across three categories, pesticide, severely hazardous pesticide formulation, and industrial chemical. Parties to the convention must provide explicit prior consent before any Annex III chemical is exported into their territory, and exporting parties must communicate the decision to their domestic exporters.
What Annex III lists
| Category | Examples | Total entries |
|---|---|---|
| Pesticides | DDT, lindane, parathion, methyl bromide, monocrotophos | ~35 |
| Severely hazardous pesticide formulations | Paraquat dichloride formulations above 14% w/w, methyl-parathion granular formulations | ~3 |
| Industrial chemicals | Asbestos (chrysotile, crocidolite, others), polybrominated biphenyls (PBBs), polychlorinated terphenyls (PCT), short-chain chlorinated paraffins (SCCPs), tributyltin (TBT) compounds | ~17 |
The list grows over time. Conferences of Parties (COPs) meet every 2 years and consider proposals to add new chemicals based on national regulatory action. Chrysotile asbestos has been proposed for listing at multiple COPs and remains under discussion as of 2026.
The current Annex III is published by the PIC Convention secretariat and updated after each COP. Exporters and importers must work from the current published list, not historical references.
How the PIC procedure works
The PIC procedure is the operational mechanism of the convention. In summary:
- A chemical is listed in Annex III. The COP adopts a Decision Guidance Document (DGD) for each new listing, summarising the regulatory action that triggered the listing.
- Each importing party publishes its national decision. Each country that is party to the convention publishes a national position on each Annex III chemical: consent to import, refuse import, or consent subject to specific conditions. National decisions are aggregated into the PIC Circular published every 6 months by the secretariat.
- Exporting parties communicate the decisions. The Designated National Authority (DNA) in the exporting country must communicate the importing party’s decision to its national exporters and require the exporter to comply.
- Export notifications. Beyond Annex III, the convention requires exporters to notify the importing country before the first export of any chemical that is banned or severely restricted in the exporting country. This applies to chemicals not on Annex III.
- Customs enforcement. Importing parties enforce the PIC decision at customs. A cargo of an Annex III chemical without the importing country’s consent is rejected at port.
What a Chinese exporter must do for PIC-listed cargo
China is a party to the Rotterdam Convention (ratified 22 March 2005). For PIC-listed cargo, a Chinese exporter must:
- Confirm the importing country’s decision. Check the most recent PIC Circular (or the secretariat database) for the destination country’s published decision on the specific chemical.
- Obtain the export licence. China’s MEE and the Ministry of Commerce jointly administer the export side of the convention. A Chinese exporter shipping a PIC chemical must hold an export licence issued under the Chinese implementation regulations (《关于实施中国化学品环境管理对外贸易要求的公告》).
- Provide the required documentation. The export shipment carries a chemical export notification document referenced in the customs declaration, with the importing country’s prior consent attached.
- Honour any conditions imposed. If the importing country consented subject to conditions (specific use, packaging, end user), the exporter must satisfy those conditions and the documentation must reflect them.
For a Chinese factory shipping chrysotile asbestos to India (where the importing party has consented subject to specific industrial-use conditions), the export licence, the bill of lading, the SDS, and the importer’s end-use declaration must all align. Mismatches are caught at either Chinese export customs or Indian import customs and the cargo is held.
When the Rotterdam Convention is the wrong reference
The Rotterdam Convention is not a chemical ban. It is a transparency mechanism. A chemical listed in Annex III can still be traded if the importing party has consented. The convention is also not the only international chemical treaty:
| Treaty | What it does |
|---|---|
| Rotterdam Convention | PIC procedure for trade in 55 listed hazardous chemicals and pesticides |
| Stockholm Convention | Outright phase-out of Persistent Organic Pollutants (POPs), much stricter |
| Basel Convention | Trade in hazardous waste, including chemical waste |
| Minamata Convention | Mercury and mercury compounds, phase-out and trade restrictions |
| Montreal Protocol | Ozone-depleting substances, phase-out schedule |
A chemical can be listed under multiple treaties simultaneously. PCBs are Stockholm-listed (POP) and effectively prohibited from new trade. SCCPs are Stockholm-listed and Rotterdam-listed. Asbestos is Rotterdam-listed (Annex III) and Basel-listed (when handled as waste).
For chemical sourcing, always check the chemical against all three of Rotterdam, Stockholm, and Basel before booking. The trade-restriction layer matters before the pricing.
How the convention catches exporters off guard
Three failure patterns recur:
- Importing party adds the chemical to its national restriction list mid-shipment. A chemical previously freely traded is added to Annex III at a COP, the importing country publishes its national decision in the next PIC Circular, and shipments already in transit can be refused on arrival. Always check the PIC Circular within 30 days before booking.
- The Designated National Authority changes. The Chinese DNA contact for the convention sometimes changes between MEE personnel; the new contact may have different documentation expectations. The export licence process can stall while the new DNA reviews.
- The importing country imposes new conditions. A country previously consenting to import paraquat formulations adds a new condition (e.g. labelling in local language). Existing labels are non-compliant and cargo is held.
The convention’s relationship to REACH and TSCA
The Rotterdam Convention is a transparency framework. REACH is the EU registration regime. TSCA is the US inventory regime. The conventions and the registration regimes do different work:
- A Rotterdam Annex III chemical that is REACH-registered can still be exported to the EU under PIC procedure
- A REACH-restricted chemical may also be Rotterdam-listed; both regimes apply
- TSCA does not generally restrict export from the US to other countries, but the EPA’s PIC implementation requires US exporters of Annex III chemicals to follow the convention procedure
For Chinese exporters trading globally, the practical work is to maintain a chemical-by-chemical compliance file that lists the chemical’s status under Rotterdam, Stockholm, Basel, REACH, TSCA, AICIS, and K-REACH, refreshed at least annually.
Related terms
PIC procedure is the operational mechanism of the convention. Stockholm Convention is the parallel POPs treaty. REACH and TSCA are the EU and US chemical regimes. SVHC is the EU REACH “Substances of Very High Concern” list. IMDG Class 6.1 and Class 9 are the transport classifications most often associated with PIC chemicals.