CAS No. 79-57-2

Characteristics	Pale yellow to tan, crystalline powder
A. Absorption at 353nm	96.0%~104.0%
B.	Color reaction
Crystallinity	Meet the requirement
PH Value	4.5~7.0
Moisture	6.0%~9.0%
Assay	≥ 832 ug/mg
Light-absorbing impurities
Light-absorbing at 430nm	≤ 0.25%(anhydrous substance )
Light-absorbing at 490nm	≤ 0.20%(anhydrous substance )
Particle Size
U.S. Sieve No.20(850um)	All pass
U.S. Sieve No.80(180um)	<5% max on the sieve
Related substances
4-epioxytetracycline	≤ 0.5%
Tetracycline Hcl	≤ 2.0%
Eluting on the tail of the principal peak	≤ 2.0%

Molecular Formula: C22H24N2O9
Molecular Weight: 460.43
Hazard Symbols: Xn,Xi
WGKGermany: 2
HS Code: 30029090

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Assay:99.0%min