What are the changes from the ZDHC MRSL V3.1 published in April 2023 and the ZDHC MRSL V4.0 published in October 2026?

The ZDHC MRSL V4.0 has been updated in response to queries from stakeholders and after discussion with the MRSL Council. The document has been updated to reflect changes in supplier guidance, formulation limits and in the note about the testing procedure for specific substances.

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What are the changes from the ZDHC MRSL V3.1 published in April 2023 and the ZDHC MRSL V4.0 published in October 2026?

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