A yellow or yellow- green powder, odorless, a little peculiar smell.Slightly soluble in DMF, insoluble in water or in ethanol.

Acidity: PH between 5.0 and 7.0

Loss on drying: Not more than 1.0 percent

Chloride: Not more than 0.28 percent

Ammonium salt: Not more than 1.0 percent

Free 2-hydroxy-4, 6-dimethylpyrimidline: A not more than 0.35

Residue on ignition: Not more than 0.5 percent

Assay ( on the dried basis ): 98%min

C13H10N4O5 67.4%-73.0%

C6H8N2O 27.7%-30.0%