This product is white fine powder, odorless. Compared with the traditional calcium carbonate and calcium citrate, it has the advantages of high solubility, high biological absorption and utilization, reduction of iron absorption obstruction, good flavor, safety and non-toxicity. CAS No. : 4468-02-4; Molecular Formula:C12H22O14Zn; Molecular Weight: 455.68; Standard: EP/BP/USP/FCC; https://www.richen-nutritional.com/calcium-citrate-malate-food-grade-organic-calcium-salt-product/