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Macroporous Weak-Acid Cation-Exchange Resin with Chelating Iminodiacetic-Acid Group for Ferric Ions Removal. Selective Chelation: Specifically binds to metallic ions with valences greater than or equal to divalence. Long Service Life: Resin service life is 2-3 years with proper operation. Comprehensive Warranty: Includes a 3-year after-sales warranty for mechanical and functional defects. ISO 9001 Certified: Certified by ISO9001:2015, WQA, TUV, SGS, and MSDS standards. Versatile Packaging: Available in Bag-in-Pallet, Bulk Bag, and Vacuum Bag options. Global Shipping Support: Air parcel for samples and sea transport for orders via major carriers.