Caustic Soda, Potassium Hydroxide, Calcium Carbide manufacturer / supplier in China, offering White Crystal Oxalic Acid Dihydrate 99.6% for Metal and Marble Polish Using, High Quality Industrial Grade Oxalic Acid Grey Package CAS No.: 144-62-7, Supply CAS 144-62-7 High Purity Oxalic Acid/Oxalate Acid 99% and so on.