CITRIC ACID ANHYDROUS BP93 Stand Analysis:USP23/BP93 Appearance:white crystals or crystalline powder Transparency and colour : pass test Purity:99.5-101.0% Water:1% max Sulfate:150ppm max Oxalate:350ppm max Barium:pass test Calcium:200ppm max Heavy metals:10/5ppm max Fe:50ppm max Chloride:50ppm max As:3ppm max Ash:0.1% max Organic volatile impurities: pass test