In a context of industry being driven by sustainability, transparency, and chemical safety, the technical criteria of OEKO-TEX® certifications are once again being updated. Starting June 1, 2026 new regulations and limit values will come into effect after a three-month transition period. These changes directly affect manufacturers, suppliers and brands operating under the STANDARD 100, ECO PASSPORT and ORGANIC COTTON standards.
The following is a summary of the most relevant changes that companies and suppliers in the textile supply chain will need to take into account and that will mark this global update.
OEKO-TEX® ECO PASSPORT: focus on biodegradability
One of the most relevant points is the introduction of biodegradability requirements in the ECO PASSPORT certification , which affects chemicals used as surfactants, water softeners or complexing agents.
For the first time, OEKO-TEX® will require verifiable proof of biodegradability, either through OEKO-TEX® institutes, accredited external entities or official ECHA listings.
Self-declarations will still be allowed, although biodegradability cannot appear on the certificate unless there is independent evidence.
This step reinforces the international commitment to reducing the environmental impact of chemicals used in textile and leather processes.
OEKO-TEX® ORGANIC COTTON: greater traceability and more stringent processes
The ORGANIC COTTON certification also incorporates significant changes aimed at improving transparency and control over processes.
Goodbye to the “GMO not detectable” mention
OEKO-TEX® has removed the reference, given that accidental contamination of up to 4.9% of GMOs may occur. The Organisation believes that the mention could lead to inaccurate interpretations for consumers and brands.
Wet processes: progressive hardening
- In the initial certifications, suppliers with uncertified wet processes will continue to be accepted.
- In renewals, all processes must be certified
The sector will have an adaptation period until June 2027, which is key for companies to align all their suppliers.
Complete digitisation of traceability: one of the most significant transformations is the adoption of the digital chain of custody system, replacing paper certificates with a fully traceable digital record. This advance reduces the risk of fraud and simplifies document management.
OEKO-TEX® STANDARD 100: Strengthening control in the supply chain
The best-known standard in the OEKO-TEX® family also has updated criteria:
Stricter upstream certifications
From 2026, the acceptance of second-tier supplier certificates will be limited to first-time certifications only.
For renewals, the certification must come from the direct supplier, strengthening traceability.
Wet processes under control
STANDARD 100 adopts the same approach as ORGANIC COTTON: uncertified wet processes are only permitted in the initial certification. Upon renewal, certification must be provided throughout the entire supply chain.
Separate RSL and new verifications
The Restricted Substances List (RSL) is now published as a separate file – for more clarity and manageability – and incorporates a second set of tests when risk parameters are detected during the certification process. This will allow for rapid confirmation of whether an improvement has actually resolved the non-compliance.
New limit values and substances under observation
In addition to adjustments to the criteria of each standard, OEKO-TEX® has introduced new substances to its catalogue of limit values and revises existing ones. Among the additions are compounds such as DBDPE, n-Hexane, and Dechlorane Plus, along with specific restrictions for reactive dyes and pesticides. bisphenols, p- anisidine and TPP are being updated and the presence of synthetic glitter is being reviewed, aligning with the new European requirements on microplastics.
The list of substances under observation is also being expanded, with special attention to monomers and compounds with potential risk to human health and the environment.
Exceptions in total fluoride
As a significant new feature, OEKO-TEX® will allow exceptions to be requested when a total fluoride result exceeds the limit, provided it is demonstrated that the source is non-PFAS.
To qualify, the applicant must provide additional testing and technical documentation that clearly identifies the source of the fluoride. When an exception is approved, it will be included by means of a note or clarification within the scope of the certificate.
Impact on the industry: towards a more demanding and transparent certification
The 2026 regulatory package confirms the industry trend: greater traceability, more rigorous analysis and more accessible information for brands and consumers. The new requirements will force suppliers to improve documentation, digitisation and coordination with their clients.
For certified companies, these updates represent an opportunity to strengthen competitiveness and move towards more responsible production models that are aligned with global regulatory expectations.
These updates consolidate OEKO-TEX® as a benchmark in the development of safe, sustainable solutions for the textile and leather industries.
After the three-month transition period, all these updates will be mandatory from June 1, 2026 for new certifications and renewals.