Cefalexin impurities and related standards

8 reference standards related to Cefalexin held in the RSSE catalogue — pharmacopoeial impurities, non-compendial impurities, metabolites and labelled analogues where available.

CAS numbers are listed for 8 of 8; 7 entries carry a structure drawing.

Cefalexin — related standards
Compound	CAS No.	Catalogue No.	Formula	MW
Cefalexin impurity E	146794-70-9	RS-C143002	C13H18N2O4S	298.36
Cefalexin Impurity B	22252-43-3	RS-C143003	C8H10N2O3S	214.24
Cefalexin impurity A	2835-06-5	RS-C143004	C8H9NO2	151.16
Cefalexin impurity L	34632-04-7	RS-C143005	C16H17N3O4S	347.39
Cefalexin impurity J	56193-21-6	RS-C143006	C16H17N3O5S	363.39
Cefalexin impurity C	72528-40-6	RS-C143007	C24H24N4O5S	480.54
Cefalexin EP Impurity F	79750-46-2	RS-C143008	C16H17N3O4S	347.4
Cefalexin Impurity 14	1323247-65-9	RS-C143001	C16H19N3O5S	365.4

Structures

Cefalexin impurity E

CAS 146794-70-9RS-C143002
COA per lot
Cefalexin Impurity B

CAS 22252-43-3RS-C143003
COA per lot
Cefalexin impurity A

CAS 2835-06-5RS-C143004
COA per lot
Cefalexin impurity L

CAS 34632-04-7RS-C143005
COA per lot
Cefalexin impurity J

CAS 56193-21-6RS-C143006
COA per lot
Cefalexin impurity C

CAS 72528-40-6RS-C143007
COA per lot
Cefalexin EP Impurity F

CAS 79750-46-2RS-C143008
COA per lot
Cefalexin Impurity 14

CAS 1323247-65-9RS-C143001
COA per lot

Cannot find the impurity you need? Non-compendial impurities can be quoted from a structure — a CAS number is not required. Write to [email protected].