J & K SCIENTIFIC LTD.
                            
                            Telephone18210857532; 18210857532
                            Websitehttps://www.jkchemical.com
                         
                        
                            
                                Sinopharm Chemical Reagent Co,Ltd.
                            
                            Telephone86-21-63210123 
                            Websitehttp://www.reagent.com.cn
                         
                        
                            
                                Cato Research Chemicals Inc.
                            
                            Telephone020-81960175 
                            Websitehttp://www.cato-chem.com
                         
                        
                            
                                Beijing Solarbio Science & Tecnology Co., Ltd.
                            
                            Telephone 17801761073
                            Websitehttp://www.solarbio.com
                         
                        
                            
                                Hubei Yangxin Medical Technology Co., Ltd.
                            
                            Telephone 15374522761
                            Websitehttp://www.standardpharm.com
                         
                         
                            
                                Shenzhen Polymeri Biochemical Technology Co., Ltd.
                            
                            Telephone+86-400-002-6226 +86-13028896684;
                            Websitehttps://www.rrkchem.com
                         
                        
                            
                                sgtlifesciences pvt ltd
                            
                            Telephone +8617013299288
                            Websitehttps://www.chemicalbook.com/manufacturer/sgtlifesciences-pvt-591/
                         
                        
                            
                                Meng Cheng Technology (Shanghai) Co., LTD
                            
                            Telephone400-820-6829 
                            Websitehttp://www.mitachieve.com
                         
                        
                            
                                Energy Chemical
                            
                            Telephone021-58432009 400-005-6266
                            Websitehttp://www.energy-chemical.com
                         
                        
                            
                                Huaihua Yuanyanda Biotechnology Co., Ltd
                            
                            Telephone 18711085600
                            Websitehttps://www.chemicalbook.com/ShowSupplierProductsList1118979/0_EN.htm
                         
                         
                            
                                Shanghai Zerui Biotechnology Co., Ltd.
                            
                            Telephone021-54580889 18321124657
                            Websitehttp://www.zr-pharmaceutical.com
                         
                        
                            
                                Hubei Qingbei Yunyan Pharmaceutical Technology Co., Ltd
                            
                            Telephone18162595016; 18162595016
                            Websitehttps://www.chemicalbook.com/supplier/25457231/
                         
                        
                            
                                Hubei Moco Chemical Co., Ltd.
                            
                            Telephone18627753421; 18627756402
                            Websitehttp://www.molcoo.com/
                         
                        
                            
                                Chengdu Peter-like Biotechnology Co., Ltd.
                            
                            Telephone028-81700200 13308200041
                            Websitehttps://www.weikeqi-biotech.com/
                         
                        
                            
                                Huaihua Yuanyanda Biotechnology Co., Ltd
                            
                            Telephone 18229999901
                            Website
                         
                         
                            
                                Merck KGaA
                            
                            Telephone21-20338288 
                            Websitehttp://www.sigmaaldrich.cn
                         
                        
                            
                                Santa Cruz Biotechnology Inc
                            
                            Telephone021-60936350 
                            Websitehttp://www.scbt.com
                         
                        
                            
                                Hubei Yangxin Medical Technology Co., Ltd.
                            
                            Telephone0714-3299675 13092790750
                            Websitehttps://www.yongstandards.com/