WE HAVE ADVANTAGE PRICE PRODUCTS AS FOILOWS:1.CAUSTIC SODA 99% MIN,96% MIN,90% MIN2.SODIUM FORMATE 94% MIN3.SODIUM SULPHITE,90% MIN,92% MIN.4.FORMIC ACID 85% MIN.5.SODIUM METABISULFITE INDUSTRIAL GRADE,AND FOOD GRADE.6.SODIUM HYDROSULFITE 85% 88% 90%WHEN YOU NEED THESE PRODUCTS,PLEASE CONTACT US,ALSO OTHER CHEMICAL PRODUCTS YOU NEED,PLEASE LET ME KNOW.