A practical guide to registration, tonnage tracking, DUIN status and supply-chain records for businesses importing chemicals into Great Britain.
A GB business importing a substance from outside Great Britain must establish its UK REACH role, track annual substance volumes and secure registration coverage where required. The key trigger is generally one tonne or more per substance per year, not one tonne per product, shipment or overseas supplier.[1]
Under UK REACH, an importer brings a chemical substance into England, Scotland or Wales from the EU, EEA, Northern Ireland or elsewhere. The GB legal entity responsible for import cannot assume that an overseas manufacturer's EU registration covers it. A non-GB manufacturer, formulator or article producer may appoint a GB-based Only Representative to take on importer registration duties, but the importer should obtain documentary confirmation that its substance, uses and volumes are covered.[1]
Map each physical supply route to the contracting entities. Incoterms, customs representation and ownership of stock may inform the commercial picture, but the regulatory role requires a substance-by-substance review. Record the overseas manufacturer, exporter, GB consignee, composition, substance identity and any Only Representative appointment. Do this before treating the goods as covered.[1]
A GB legal entity intending to manufacture or import a substance at or above one tonne per year must submit a registration to HSE unless an exemption or transitional arrangement applies. A new registrant normally needs a complete registration before manufacture or import reaches that threshold. Registration is not made for a mixture as such: its constituent substances must be considered separately, aggregating the import volume of each substance across all mixtures and direct imports.[1][2]
UK REACH information requirements are organised by annual tonnage. The familiar bands are one to ten, ten to one hundred, one hundred to one thousand, and one thousand tonnes or more per registrant per substance. Higher tonnage generally brings broader data requirements. Hazard properties can also affect transitional deadlines, so tonnage is not the only field that belongs in the compliance register.[3]
A useful volume ledger converts every imported formulation into constituent substance mass. It should reconcile purchase orders, customs entries, receipts, stock corrections and returns. Aggregate by GB legal entity and calendar year, then flag forecast volumes before a band is crossed. Procurement should not rely solely on the concentration ranges disclosed in an SDS where exact composition is needed to establish regulatory tonnage; obtain suitable confidential confirmation from the supplier or Only Representative.[3]
Registrants collect information on substance properties and uses, assess hazards and potential risks, and submit through the UK REACH service. The principle of one substance, one registration is retained: manufacturers and importers of the same substance should participate in a joint registration, select a lead registrant and share relevant data. HSE notes that a fee is usually charged for a new registration.[3]
Before committing to an import, confirm the substance identity, likely tonnage band, intended uses and whether an existing joint registration can be joined. Data access and dossier work can take time. A buyer should make regulatory coverage a gating item alongside specification, packaging and transport review, rather than discovering after arrival that the GB importer has no valid route to market.[3]
A Downstream User Import Notification was designed for qualifying GB businesses that had been downstream users or distributors under EU REACH before the end of the transition period and continued importing EU-registered substances. Eligible entities should have notified by 27 October 2021, but HSE says a late notification can still be submitted and should be made as soon as possible. A DUIN is expressly not a pre-registration.[4]
Current deferred registration deadlines are 27 October 2029, 27 October 2030 and 27 October 2031, depending on tonnage and hazard profile. Continuing beyond the applicable deadline requires a new registration for each substance. A DUIN applies to substances, not formulations; for imported mixtures, individual constituent substances at one tonne or more per year are the relevant entries. Businesses that were not eligible for the transitional route may need a new registration before first reaching the threshold.[4]
Registration is only one part of import compliance. An importer placing hazardous substances or mixtures on the GB market must classify, label and package them under GB CLP. It must monitor adequate new scientific or technical information, re-evaluate classification without undue delay when appropriate, update labels following classification changes and retain classification and labelling information for at least ten years after last supply.[2]
The importer must also provide compliant supply-chain information. Obtain an English SDS, check that the supplier and emergency details fit the GB supply arrangement, and ensure identified uses and risk-management information are suitable. The separate guide to UK supplier SDS duties explains when sheets are mandatory and when revisions must be distributed.[3]
HSE acts as “the Agency” for UK REACH and receives registrations.[1] The Office for Nuclear Regulation is the statutory regulator for conventional health and safety on licensed nuclear sites; importers operating in that context should establish the appropriate enforcement interface.[5] Importers should direct questions to the correct body while retaining ownership of their compliance decision.
Build a product-release file containing the role assessment, UK REACH number or Only Representative coverage statement, DUIN evidence where relevant, annual tonnage calculation, current SDS, classification approval and supplier-change review. Recheck it when formulation, manufacturer, source country, legal entity, annual forecast or intended use changes.[3]
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