... 0.1-1mm,1.2-2mm,0.3-3mmAppearanceWhite crystals or powder Molecular Weight: 174.24Molecular Formula: K2SO4Density: 2.662Melting ... (2) can be used as the raw material to produce multiple-element compound fertilizer, or as potassium fertilizer to fertilize field, especially ... avoid using chlorine key crops such as tobacco, tea, grapes, sugar cane, beet, watermelon, potato, etc. Adding not only the ...