usp31,bp2007
appearance white powder or free-flowing granules;
solubility slightly in alcohol, easily in water
identification the infrared absorption spectrum of the preparation of the test specimen exhibits max only at the same wavelength as that of a similar preparation of the corresponding usp ref. standard
conductivity not more than 20μs • cm-1
clarity <1# clarity solution
color of solution clear and colorless
particle size 80mesh
as 1.0ppm max
assay 96.0-101.5%
melting point 164-169℃
acidity not more than 0.30ml of 0.020 n sodium hydroxide is required for neutralization
loss on drying 0.3% max
sulphated ash 0.1% max
specific rotation 137°-145°
reducing sugar not more than a very slight precipitate is formed