4-Epianhydrochlortetracycline Hydrochloride (chlortetracycline impurity K) is a secondary degradation product formed by dehydration of epichlortetracycline at the C6 position to aromatise the B ring. 4-Epianhydrochlortetracycline is an important standard for monitoring tetracycline stability.
4-Epianhydrochlortetracycline Hydrochloride is slightly soluble in water, ethanol, methanol, DMF or DMSO.
