Tianjin MInle Chemical Import&Export Co.,LTD offer chromium prodcuts( sodium dichromate,potassium dichromate,chromic acid .chrome oxide green,basic chromium sulphate ) and soium sulphide flakes.We have been exported these produts to abroad for more than seven years.We are reliable and professinal . If you are need these prodcuts,pleae kindly send me a E-mail.(wendy@tjminlechem.com) Thank you .