... reference guide to the uses of foods additives permitted under Federal Law), a nisin preparation is a concentrate of dry material ... Generally Regarded as Safe (GRAS) designation in the U.S. Federal Register of April, 1988 and is approved as a natural ... Xiangsheng Chemical Technology Co., ltd.Add: A-2509, Top Yihe International, No.10, Hongkong Middle Road, Qingdao.Tel.: 0086 532 85039257 ...