"ZHENGZHOU WELCOM TECH. CO., LTD. is located in National University Science Park of Henan Province, which is a high technology enterprise, concentrating on products manufacturing and exporting to South America, Europe, Africa and Southeast Asia. Our address is sales(AT)cnwelcom.com.cn Some of our products as follows:" Acetic Acid Glacial Aluminium Chloride Boric Acid Barium Nitrate Calcium Formate Calcium Nitrate Caustic Soda EDTA Acid EDTA Disodium EDTA Tertasodium Formic Acid Fumaric Acid Hydrogen Peroxide Magnesium Carbonate  Manganese Dioxide 91%min Maleic anhydride Oxalic Acid Paraformaldehyde Stearic Acid 200/400/800 Soda Ash Sodium Acetate Sodium Bicarbonate Sodium Formate Sodium Gluconate Sodium Nitrate Sodium Nitrite Sodium Thiosulfate Sodium Tripolyphosphate Sodium Metabisulfite Sodium Hexametaphosphate Super Absorbent Polymer Trisodium Phosphate Zinc Carbonate Zinc Chloride Zinc Acetate