... factory direct sales. 2.with standards on products. 3.ISO certification. Aluminum Sulfate 1.Characters:content: 15.8%,16%,17%cas no ... precipitation agent, fixing agent and filling agent.8.storage1, Refined with polyethylene bag lined with aluminium plastic woven sack packaging, the net ... warehouse, and prevent the rain, prevent pollution.3, Not with toxic or harmful items must be of reservoir, prevent ...