The European Union regulates compostable packaging, but the European Commission does not normally perform the ecotoxicity tests used to demonstrate that individual compostable materials are safe for composting.
The system works differently.
Manufacturers have their materials tested, generally through specialised laboratories. Under standards such as EN 13432, testing includes biodegradation, disintegration, chemical characteristics and ecotoxicity.
Successful test reports can become part of the evidence supporting certification and conformity.
Under the EU’s new Packaging and Packaging Waste Regulation (PPWR), manufacturers must also maintain technical documentation demonstrating that their packaging complies with the applicable requirements. National authorities can request this documentation.
But there is another category of information: failed tests.
A compostable plastic formulation may evolve during development. A manufacturer could test one formulation, obtain an undesirable ecotoxicity result, modify the formulation and test it again.
Eventually, a formulation may pass.
What happens to all the earlier failures?
We could find no general requirement in the PPWR obliging manufacturers to systematically submit the complete history of unsuccessful ecotoxicity tests from product development to the European Commission.
Nor does there appear to be a central EU database collecting every successful and unsuccessful ecotoxicity test performed on compostable plastic formulations.
That distinction matters.
A successful ecotoxicity test tells regulators that a particular formulation met particular criteria under particular test conditions.
A failed test can tell scientists something different: which formulations, additives, degradation products or concentrations produced undesirable biological effects.
Europe has constructed an elaborate system for demonstrating that products pass.
Perhaps regulators should also be asking what happened when they failed.
Personal Remarks
The European Commission cannot possibly be expected to waste its limited resources examining every failed ecotoxicity test. Brussels has priorities.
After all, someone has to regulate speech, police the internet and keep Europe’s troublesome independent bloggers sufficiently occupied.
Ecotoxicity tests can wait.
Sources
1. European Commission / EUR-Lex — Packaging and Packaging Waste Regulation (EU) 2025/40
PPWR — Regulation (EU) 2025/40
2. DIN CERTCO — Certification Scheme for Industrially Compostable Products
DIN CERTCO Certification Scheme
3. TÜV Austria — OK compost INDUSTRIAL / EN 13432
TÜV Austria — Industrial Compostability Certification