Zinc Bisglycinate occurs as white powder and used as a zinc nutrient in the foods and supplements. CAS No. : 14281-83-5; Molecular Formula: C4H8N2O4Zn； Molecular Weight: 213.5； Standard: GB1903.2-2015； Product code: RC.03.06.191954 Features Stable Zinc Bisglycinate is stable throughout the intestinal tract, making it more bioavailable. Other common sources https://www.richen-nutritional.com/zinc-bisglycinate-food-grade-zinc-supplement-product/