This product is colorless prismatic crystal or white powder ; sulfur dioxide smell, sour, salty; storing a color gradient yellow

Purpose: chemical pharmaceutical industry for the production of insurance powder, sulfamethazine analgin, caprolactam and chloroform, benzene styrene sulfone and purifying formaldehyde. Photographic industry as a fixing agent ingredients. Perfume industry for the production of vanillin. Used in brewing industry preservatives, rubber coagulant and cotton bleached dechlorination agent. Organic intermediates, dyes, leather is used as a reducing agent used for electroplating industry, oil field wastewater treatment as well as mine processing agent. Packaging: 25 kg net inside the plastic bag or 1000 kg net major packaging bags.