1,Humic acid: 50%-80%min 2,Organic matter 70%min 3,powder ... find a better humic here in China, buy it!Humic acid: The complicated macromolecule organics contains abundance of active functional groups ... expanders of storage battery Product CharacteristicsColour: Black Appearance: Powder humic acid: 50%-80%min Organic matterW/W: 70%min Packaging: 25kg ...