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NSF Certified Ferric Sulfate Coagulant (Produced by Fresh Acid) Awwa B406 Standard for Drinking Water & Mining, Find Details and Price about Water Treatment Flocculant from NSF Certified Ferric Sulfate Coagulant (Produced by Fresh Acid) Awwa B406 Standard for Drinking Water & Mining - Hunan Yide Chemical Co., Ltd.