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ITEM	SPECIFICATION
Characteristics	yellow crystalline powder
Identification	A. Absorption at 353nm: 96.0%~104.0%
Crystallinity	Meet the requirement
PH Value	4.5~7.0
Moisture	6.0%~9.0%
Assay	>=832 ug/mg
Light-absorbing at 430nm	=<0.25%(anhydrous substance )
Light-absorbing at 490nm	=<0.20%(anhydrous substance )
U.S. Sieve No.20(850um)	All pass
U.S. Sieve No.80(180um)	<5% max on the sieve
4-epioxytetracycline	=<0.5%
Tetracycline Hcl	=<2.0%
Eluting on the tail of the principal peak	=<2.0%