Extrepure 001x7 Cation Resin is produced by Extrepure Resin (Shanghai) CO.,LTD which is a leading manufacturer of ion exchange resin in China. They specialize in research, development, production, sales and service of ion exchange resin for many years with excellent products, and annual production average of 60,000 cubic meters and have a bio separation laboratory established jointly with several universities in China.Cation Exchange Resin Extrepure 001x7 has passed ISO9001:2008, ISO14001:2004 quality management system certification and environmental management system certification, sanitary permit for drinking water in National Health Department of China, and obtained WQA Gold Seal NSF 44/61.Typical Physical and Chemical Properties Resin Extrepure 001x7 :* Polymer Matrix Structure : Crosslinked Polystyrene Divinylbenzene* Physical Form and Appearance : Brown yellow to buown grey color beads* Functional Groups : R-SO3* Ionic Form ,as shipped : Na+* Total Capacity, Na+ form, wet, volumetric : 1.9 eq/l min* Moisture Retention, Na+ form : 45-50%* Particle Size Range : 0.3mm-1.2mm* Uniformity Coefficient (max.) : 1.6* Effective size : 0.4-0.7mm* Reversible Swelling: Na+ H+ (max.) 10%, Ca2+ Na+ (max.) 5%* Specific Gravity, moist Na+ Form : 1.27* Temperature Limit : 120C (250 F)* pH Range, Stability : 0 - 14