Oxytetracycline Base

CAS number: 79-57-2

Molecular formula: C22H26N2O8

molecular weight: 446.4504

Chemical structure:

Name of Product:
Oxytetracycline Dihydrate
Shelf Life:4 years
Specification:BP2011
Test ItemsSpecificationResults of Analysis
CharactersYellow crystalline powder
Conform
IdentificationA.Thin-layer chromatography resultsConform
B.A deep red colour develops in sulfuric acid and it becomes yellow when being diluted with waterConform
C.Reaction of chloridesConform
Ph
4.5 to 7.55.5
Specific optical rotation-203 to -216-210°
Specific absorbance
290 to 310304
Light-absorbing impurities430nm≤0.250.12
490nm≤0.20
0.14
Related substancescontent of impurity peak meets the requirements
Conform
Heavy metals (ppm)≤50<50
Water (%)6.0 to 9.07.5
Sulfated ash (%)≤0.50.1
Assay (%)95.0 to 102.097.2