1. Add 4-hydroxybutanoic acid (CAS No.. 591-81-1) as an essential monomer under Appendix 12, applicable to polymers where the total molar ratio of alcoholic acid monomers is no less than 50% and the main chain is linked by ester bonds; 2. Add 1,5-pentanediamine (CAS No.. 462-94-2) as an essential monomer under Appendix 17, applicable to polymers where the total molar ratio of amine-acid monomers is no less than 50% and the main chain is linked by amide bonds; 3. Relocate the entry "hydrogenated and dimerized unsaturated fatty acids" originally listed under the amines category in Appendix 17 to the acids category.
Update to the Japan-Positive List of Food Contact Materials-Two essential monomers added, one classification corrected
Update Date: Jul 3, 2026
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