citric acid item: bp93 characteristic: colorless crystals solubility,clarity&color of solution, identification, barium above conforming with the test, calcium: <0.02%, iron: <0.005%, heavy metals:<0.001% chloride:<0.005%, oxalate: <0.035%, sulphate:<0.015%, readily carboized substance: not heavy the standard, sulphate ash:<0.1%, moisture: <7.5-9.0%, purity: 99.5-101.1%, packing 25kgs/polyethein bag the price is usd560/mt fob qingdao oxalic acid content: 99.6-99.4% min. oxalic acid rdical: 0.08-0.01% max. ash: 0.08-0.01% max. heavy metal: 0.001-0.002% max. fe: 0.0015-0.002%max. chloride: 0.003-0.004% max. above products? package are 25kg/bag the price is 365usd/mt fob qingdao please give me an information if you are interest in it. i am looking forward to hearing your early reply best wishes, gabriel lee shandong chemical industrial factory address:14c, b building, no.9 shandong road. tel: 0086 532 5834085 fax: 0086 532 5834083 e-mail: gabrileli@163.com