Our products are widely recognized and trusted by users and can meet continuously changing economic and social needs for Nahs, Sodium Hydrosulphide 10/20/30ppm , Low Iron Chemical Sodium Hydrosulphide/ Sodium Hydrogen Sulphide , Sodium Hydrosulfide ,Barium Sulphate for plastic . We have ISO 9001 Certification and qualified this product .over 16 years experiences in manufacturing and designing, so our products featured with best quality and competitive price. Welcome cooperation with us! The product will supply to all over the world, such as Europe, America, Australia,Chile , America ,San Diego , Seattle .We believe that good business relationships will lead to mutual benefits and improvement for both parties. We've got established long-term and successful cooperative relationships with many customers through their confidence in our customized services and integrity in doing business. We also enjoy a high reputation through our good performance. Better performance might be expected as our principle of integrity. Devotion and Steadiness will remain as ever.