Characters

Yellow,crystalline powder

Identification

Meets the requirements

PH

2.0---3.0

Specific Optical Rotation

-105° ~-120°

Specific Absorbance

300----335

Light-absorbing Impurities

≤ 0.07

Water

1.4%---2.8%

Sulphated Ash

≤ 0.4%

Heavy metals

≤ 50ppm

Related Substance

metacycline hyclate 

≤ 2.0%

6-Epidoxycycline

≤ 2.0%

Other substances 

≤ 0.5%

Assay 

88.0%---94.0%(CP)

Standard

EP/USP/CP