We are offering citric acid anhydrous. Appearance: colorless crystals or white crystalline powder assay: 99.5-101.0% moisture: 0.5%maxsulphated ash: 0.05% maxsulphate: 150ppm maxoxalate: 100ppm maxchloride: 50ppm maxcalcium: 200ppm maxbarium: pass test iron: 10ppm max heavy metals (as pb) : 5ppm maxarsenic: 1ppm maxmercury: 1ppm maxaluminium: 0.2ppm maxlead: 0.5ppm maxbacteria endotoxin: 0.5 iu/mg maxorganic volatile impurities: pass test tridodecylamine: 0.1ppm max