Ferrous Gluconate Formular is C12H22FeO14*2H2O FCC IV ,USP28 and BP 98 Storage: 25kg/bag Content as dry % >=95 Losing on drying % 6.5-10.0 Chlorid as Cl- % <=0.07 Sulfate as SO42 % <=0.1 Oxalic Acid Test Negative and Yeducing Suger Qualified Iron % <=2.0 Arsenic as As % <=0.0003 Pb as Pb % <=0.0005 Hydrargyrum Hg % <=0.0003 Ruipu is a manufacture of producing of high quality nutritional mineral additive ( Food Grade) , such as Ferric Pyrophosphate, Ferric Phosphate, Ferric Fumarate, Calcium Lactate, Ferrous Lactate, Sodium Lactate, Sodium Malate, Zinc Gluconate, Ferrous Gluconate, Ferric Sodium Edetate, ect. We also passed through ISO9001-2000 international quality system certifications. And expressly, our price is very competitive because we are manufactory, we are the source.