Qingdao Sigma Chemical Co., Ltd.
Country: China (Mainland)
Business Type: Trading Company
High Quality 4H-Pyran-4-one,3-hydroxy-2-methylCAS NO.: 118-71-8
High Quality 1,3,5-Triazine-2,4,6(1H,3H,5H)-trioneCAS NO.: 108-80-5