Risedronic acid CAS NO.105462-24-6

RISEDRONIC ACID Specification For : Risedronic Acid CAS No: 105462-24-6 Chemical Name [1-Hydroxy-2-(3-pyridinyl)ethylidene]bisphosphonic acid …

RISEDRONIC ACID Specification For : Risedronic Acid CAS No: 105462-24-6 Chemical Name [1-Hydroxy-2-(3-pyridinyl)ethylidene]bisphosphonic acid Molecular formula C7H11NO7P2 Molecular Weight 283.11 Test Specification Description White to off white Crystalline powder Identification A) Infra Red Absorption Spectrum Solubility Soluble in 0.1 M sodium hydroxide, Sparingly soluble in water, insoluble in organic solvents Clarity & colour of solution (1% w/v in water) Clear & Colourless solution pH (1% in Water) Limit : 3.7   4.8 Loss on Drying Limit : 12.2% - 13.5% w/w/ Heavy Metals Limit : Max. 20 ppm Residual Solvents Monochloro Benzene Methanol Chloroform Limit : 2000 ppm 1500 ppm 1000 ppm Related Substances a) Pyridine   3-actic acid (by HPLC) b) Phosphite content (by tritrimetic Max. 0.2% Max. 1% Assay % (by HPLC) (On anhydrous basis) Limit : Min. 99%