Our goal is to provide high quality products at competitive prices, and top-notch service to customers around the world. We are ISO9001, CE, and GS certified and strictly adhere to their quality specifications for China Sodium Hydrosulfide and Sodium Hydrosulphide, Caustic Solid , Sodium Sulfhydrate , solfuro di sodio idratato ,Co Sulfide And Sulfate . Items won certifications with the regional and international primary authorities. For far more detailed information, please contact us! The product will supply to all over the world, such as Europe, America, Australia,Costa rica , Angola ,Indonesia , Swiss .Wide selection and fast delivery for you! Our philosophy: Good quality, great service, keep improving. We are looking forward that more and more oversea friends join in our family for further development near the future!