our product are both in high purity and quaity,It is more cheaper than other manfacturer ,Reputation is the most important Parameter Guaranteed Value Typical analysisAppearance Pure Primrose Yellow Powder Pure Primrose Yellow Powder Ferric content . 7.0%±0.5% 7.06%Solubility in water Completely soluble Completely soluble Water-Insoluble 0.01% 0.005%PH(1%sol.) 2.0-4.0 3.8 DTPA-Fe-11