THE EMPIRICAL FORMULA OF TYLOSIN TARTRATE IS (C46H77NO17)2.C4H6O6.;CARRY OUT THE METHOD FOR HPLC. THE CONTENT OF TYLOSIN A IN THE;SUBSTANCE BEING EXAMINED IS NOT LESS THAN 80%. CARRY OUT THE;BIOLOGICAL ASSAY OF ANTIBIOTICS, THE UPPER FIDUCIAL LIMIT OF ERROR;IS NOT LESS THAN 800 UNITS PER MG. CALCULATED WITH REFERENCE;TO THE DRIED SUBSTANCE.