Chromium polynicotinate: Properties: smoky gray fine powder, stable at room temperature, insoluble in water, insoluble in ethanol, in which chromium is trivalent chromium chromium nicotinate use: Feed additives, medicines and health products, food additives. Chromium Picolinate: Properties: This purple-red crystalline fine powder has good fluidity and is stable at room temperature. It is slightly soluble in water but insoluble in ethanol. The chromium ...