Sulfadiazine Silver USP GMP 98%min supplier Pharmaceutical API Artificial synthesis Anti infective Drugs made in china CAS NO.22199-08-2

appearance

white to off-white crystalline powder

identification

a:infrared absorption

b.the r,value of the principal spot in the thin-layer chromatogram of the test solution as obtained in the test for chromatogram purity corresponds to that obtained from standard solution a

c:dissolve about 1g in 15ml of ammonium hydroxide and 15ml of water in a50ml volumetric flask，dilute with water to volume，and mix：the solution so obtained responds to the tests for silver

loss on drying

≤0.5%

limit of nitrate

≤0.1%

chromatogram purity

no secondary spot in the chromatogram of the test solution is greather or more intense than the principal spot obtained from standard solution b(1.0%)

the sum of all secondary spots observed is not greater than 2.0%

silver content

29.3~30.5%

assay

98.0~102.0%

particle size

the average particle size is not greater than 10µm and the size of not more than 10% of the particles is greater than 40µm