Cephalexin Monohydrate

CAS number: 15686-71-2

Molecular formula: C16H19N3O5S

molecular weight: 365.4042

Chemical structure:

Product Name
Cefalexin Powder
Shelf Life
2 years
Tests
BP2012  SpecificationsObservations
Appearance
White or almost white, crystalline powder

Almost white crystalline

powder
Solubility
Sparingly soluble in water,practically insoluble in ethanol(96%)Conform
IdentificationIR spectrum should be concordant with the standardConform
PH4.0 to 5.54.9
Specific optical rotation
+149° to +158°(anhydrous substance)+155°
Related substances
Impurity B:
Not more than 1.0%compared to the area of the 2nd peak<1.0%
Any other impurity:Not more than 1.0%compared to the area of the 1nd peak<1.0%
Total impurity:Not more than 3.0%<3.0%
N,N-Dimethylaniline
Maximum 20 ppmNot used in process
Water4.0%to 8.0%determined on 0.300 g.6.1%
Sulphated ashMaximum 0.2%, determined on 1.0 g.<0.1%
Assay95.0% to 102.0% of C16H17N3O4S (anhydrous substance)99.5%
Density
0.27g/ml
RemarkThe product complies as per above BP2012 specifications.