Taosign Corp. is one of the most respected manufacturers exporters of preservatives, antioxidants and phosphates in China, our products are natamycin, nisin; potassium sorbate, sorbic acid; sodium erythorbate, erythorbic acid, sodium tripolyphosphate, STPP,TSPP,SAPP,SHMP,TKPP, all of them are food grade certified by Kosher & Halal.