... salts,catalyst,pigment,dyeing industry chromium chloride Shanghai Liangren Chemical Co., Ltd. was founded in 1987. We are a professional manufacturer of ... .002Al : 0.0002SO4 : 0.004water-fast : 0.005Shanghai Liangren Chemical Co.,LtdTel: +86-21-59585631 Fax : +86-21-59585627Contact : Mr FrankMob ...