identification

to pass the test

present positive reaction

solubility

freely soluble in acetone, 1,4-dioxane or chloroform soluble in alcohol or ether,very slightly soluble in water

up to standard

melting range

101104

103.0104.0

loss on drying

≤0.5%

0.05%

clatity and colour of solution

colorless clear

up to standard

chloried

≤0.02%

<0.02%

sulfate

≤0.01%

<0.01%

residue on ignition

≤0.1%

0.05%

content

≥98.5%

100.2%