For the importer’s tariff file, a polyolefin elastomer grade based on ethylene–1-octene copolymer is commonly declared under CN 3901 40 00 when the specific gravity at 23°C is below 0.94 and the ethylene mass fraction exceeds the alpha-olefin comonomer. The material is a reactor-polymerised ethylene-α-olefin copolymer with a density usually between 0.857 g/cm³ and 0.885 g/cm³ and a melt mass-flow rate measured at 190°C and 2.16 kg according to ASTM D1238 or ISO 1133-1:2022. Unlike ethylene-propylene-diene monomer rubber, POE requires no vulcanisation for most pellet-to-part conversion, but its import dossier under EU law is not defined by rheology or Shore hardness. It is defined by three separate regulatory instruments: Regulation (EC) No 1907/2006 for REACH, Regulation (EU) No 10/2011 where food-contact use is foreseen, and Regulation (EU) 2023/956 for CBAM scope. The checks for each are triggered by different legal thresholds and are not interchangeable.

REACH registration duties do not follow the polymer itself, but its monomer feeds

Polyolefin elastomer is a polymer within Article 3(5) of REACH; the polymer molecule is exempt from registration under Article 2(9). That exemption does not remove the obligation imposed by Article 6(2) on importers of polymers to register monomer substances when the polymer consists of at least 2% w/w of the monomer in chemically bound form and the aggregate quantity of that monomer is at least 1 t/y per legal entity. For a standard ethylene–octene POE, the relevant monomers are ethylene (CAS 74-85-1) and oct-1-ene (CAS 111-66-0). Where the alpha-olefin is but-1-ene, the monomer CAS number is 106-98-9. In most commercial import flows, the monomers are already registered under REACH by upstream suppliers or through Only Representatives; the importer must nevertheless retain written confirmation of registration coverage and keep the POE substance identity consistent with the registered monomer units.

The importer tonnage calculation is not based on total POE volume alone. For a representative POE with 60% w/w ethylene and 40% w/w oct-1-ene, the monomer unit tonnage is 0.6 t/y and 0.4 t/y per tonne of imported POE. If the same legal entity does not benefit from an existing registration, the 1 t/y threshold is reached at approximately 1.67 t/y of POE for ethylene and 2.5 t/y of POE for oct-1-ene. These calculations are used only to determine whether a registration gap exists; they do not replace the requirement to aggregate all imported grades and all substance forms at the legal-entity level.

Analytical characterisation of imported POE under REACH relies on high-temperature gel permeation chromatography to confirm the molecular weight distribution required by the polymer definition. The analysis is performed at 150°C using 1,2,4-trichlorobenzene as solvent; the resulting distribution must show a simple weight majority of molecules with at least three monomer units and less than a simple weight majority of molecules of the same molecular weight. Fourier-transform infrared spectroscopy or 13C-NMR data are used to quantify the ethylene/octene molar ratio and backbone branching. These records belong in the technical file even when no polymer registration is filed because they support the monomer-unit calculation under Article 6(2).

Unmodified POE pellets are not classified as dangerous under CLP, and a safety data sheet is not mandatory for the unmodified polymer under Article 31(1) of REACH. If the grade is compounded with slip agents, antioxidants, or carbon black, the mixture may cross a classification threshold, and the safety data sheet must be updated in line with Article 31 and Annex II as amended by Regulation (EU) 2020/878. Candidate List screening remains necessary for additive packages because a substance of very high concern present at 0.1% w/w or more in an article supplied later can create communication duties under Article 33 at the article stage.

Before the same pellet is used in a food-contact article, the REACH technical file must be separated from the food-contact dossier. The supplier’s REACH registration confirmation for monomers does not demonstrate food-contact suitability, and a food-contact migration test result does not replace REACH registration coverage. The two regimes operate with different protective endpoints and require separate records.

Does Regulation (EU) No 10/2011 apply to POE in repeat-use food-contact articles?

The application of food-contact law is independent from REACH registration status. Where a POE is used as an impact modifier in polypropylene closures, as a seal layer in multilayer film, or as a soft-touch overmoulding in kitchen articles, the final plastic article falls within Regulation (EU) No 10/2011 if it is an intermediate or final material intended to come into contact with food under Article 1(2). The POE does not receive a separate food-contact approval as an isolated substance; it is used only after the monomer building blocks are verified against Annex I of the Regulation and the finished article is shown to meet migration limits.

For overall migration, the standard limit is 10 mg/dm² of food-contact surface area, or 60 mg/kg of simulant for articles intended for infants and young children. Testing is conducted with the food simulants assigned under Annex III; polyolefin articles may require exposure in 10% ethanol, 3% acetic acid, 20% ethanol, 50% ethanol, and vegetable oil or an accepted substitute depending on the intended worst-case food type. The method platform is EN 1186-1 for overall migration and EN 13130-1 for specific migration. Reported results must be normalised to the actual surface area or simulant volume of the article.

Specific migration evaluation for low-crystallinity POE is dominated by extractable oligomers. The elastomeric ethylene–octene fraction has lower crystalline order than high-density polyethylene; therefore, diffusion of branched and linear oligomers can be more rapid at the same temperature. When the final article is used above 70°C, migration testing at 40°C is not sufficient to represent worst-case conditions. The testing laboratory selects the time and temperature combination from Annex V of Regulation (EU) No 10/2011 and may apply repeated-contact protocols for reusable articles. A Declaration of Compliance under Article 15(1) must identify the POE grade, the final plastic formulation, the migration test result, and any restriction or use condition. Supporting documents under Article 16 must remain available for inspection. The manufacturing line must also operate under the good manufacturing practice rules of Regulation (EC) No 2023/2006.

A US FDA 21 CFR 177.1520 clearance for ethylene polymers is not a substitute for Regulation (EU) No 10/2011 compliance. The EU dossier must include migration data generated with EU food simulants, and the Declaration of Compliance must be issued by the EU converter or importer under Article 15(1). The supplier’s FDA letter can be used only as a supporting compositional reference.

If CN 3901 40 00 is the declared code, CBAM review usually ends at Annex I verification

Regulation (EU) 2023/956 applies a carbon border adjustment mechanism to goods imported into the customs territory of the Union. Obligations attach only to goods listed in Annex I by Combined Nomenclature code; the listed sectors are cement, fertilisers, iron and steel, aluminium, electricity, and hydrogen. Polymers, including ethylene–alpha-olefin elastomers declared under 3901 40 00 or 3901 90 90, are not included. A POE shipment under either code is therefore outside CBAM unless the consignment contains a deliberately misclassified listed commodity or is combined with listed goods in a single customs declaration.

The specific gravity threshold of 0.94 is not a CBAM criterion; it is a tariff classification criterion. POE grades with density at 23°C below 0.94 fall under 3901 40 00; filled or compounded grades above 0.94 may fall under 3901 90 90. Neither heading appears in Annex I of Regulation (EU) 2023/956. If the POE contains more propylene than ethylene by weight, the potential code moves to Chapter 3902; that chapter is likewise outside Annex I. The scope check therefore becomes a stable documentation exercise rather than a continuous carbon-reporting obligation.

Transitional reporting under Commission Implementing Regulation (EU) 2023/1773 uses the same Annex I product list. A POE import under 3901 40 00 is not reportable. Goods imported under another CN code because of a masterbatch composition must be checked anew; if the code is still outside Annex I, no CBAM declarant obligations arise. Importers should retain a dated TARIC consultation printout, the commercial invoice HS code, and the safety data sheet as evidence in the event of a customs verification.

In the customs entry package, the POE importer places the TARIC consultation result, the registration documentation for monomers, the food-contact Declaration of Compliance where required, and the CBAM scope screening record behind the same invoice. Each document answers a different legal trigger, and the absence of one record does not cure a defect in another.