Lidocaine IP Indian Pharmacopoeia Short Specification 1 Chemical Name 2DiethylaminoN26dimethylphenylacetamide 2 Molecular Formula C14H22N2O 3 Molecular Weight 23434 gmol 4 Appearance A white or almost white crystalline powder 5 Assay Contains not less than 990 and not more than 1010 of C14H22N2O calculated on the anhydrous basis 6 Identification Infrared Absorption Spectrophotometry Chromatographic methods 7 Solubility Soluble in water Freely soluble in ethanol 95 and in chloroform 8 pH 45 to 65 1 aqueous solution 9 Loss on Drying Not more than 05 10 Storage Store in a wellclosed container protected from light

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Carbamazepine IP Indian Pharmacopoeia 1 Appearance White or almost white crystalline powder 2 Assay Contains 980 to 1020 of C15H12N2O calculated on the dried basis 3 Identification Infrared Absorption Spectrophotometry Chromatographic methods 4 Solubility Practically insoluble in water freely soluble in dichloromethane sparingly soluble in ethanol 95 5 Loss on Drying Not more than 05 Carbamazepine BP British Pharmacopoeia 1 Appearance White or almost white crystalline powder 2 Assay Contains 980 to 1020 of C15H12N2O calculated on the dried basis 3 Identification Infrared Absorption Spectrophotometry Chromatographic methods 4 Solubility Practically insoluble in water freely soluble in dichloromethane sparingly soluble in ethanol 96 5 Loss on Drying Not more than 05 Carbamazepine USP United States Pharmacopeia 1 Appearance White to offwhite crystalline powder 2 Assay Contains 980 to 1020 of C15H12N2O calculated on the dried basis 3 Identification Infrared Absorption Spectrophotometry Chromatographic methods 4 Solubility Practically insoluble in water soluble in alcohol and in acetone 5 Loss on Drying Not more than 05