Sildenafil impurities and related standards

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

CAS numbers are listed for 29 of 29; 27 entries carry a structure drawing.

Sildenafil — related standards
Compound	CAS No.	Catalogue No.	Formula	MW
Sildenafil Impurity 56	1185292-79-8	RS-S019002	C8H13N3O	167.21
Sildenafil Impurity 44	1308332-48-0	RS-S019003	C13H18N2O5S	314.09
Sildenafil Impurity 30	1333233-46-7	RS-S019004	C23H30N6OS2	470.65
Sildenafil EP Impurity G	1346602-67-2	RS-S019005	C38H46N10O8S2	834.96
Sildenafil EP Impurity D	1357931-55-5	RS-S019006	C17H20N4O5S	392.43
Sildenafil EP Impurity A	1391053-95-4	RS-S019007	C23H32N6O4S	488.6
Sildenafil EP Impurity F	139755-82-1	RS-S019008	C21H28N6O4S	460.55
Sildenafil Impurity 10	139755-95-6	RS-S019009	C21H28N6O4S	460.55
Sildenafil Impurity 12	139755-99-0	RS-S019010	C8H12N2O2	168.2
Sildenafil Impurity NA	139756-00-6	RS-S019011	C8H11N3O4	213.19
Sildenafil Impurity 37	139756-01-7	RS-S019012	C8H12N4O3	212.21
Sildenafil Impurity 24	139756-03-9	RS-S019013	C17H22N4O3	330.38
Sildenafil Impurity 1	139756-21-1	RS-S019014	C17H20N4O2	312.37
Sildenafil Impurity 2	139756-22-2	RS-S019015	C17H19ClN4O4S	410.88
Sildenafil Impurity 7	139756-26-6	RS-S019016	C15H16N4O2	284.31
Sildenafil Impurity 54	139756-31-3	RS-S019017	C16H17ClN4O4S	396.85
Sildenafil Impurity 51	1441-87-8	RS-S019018	C7H5ClO2	156.57
Sildenafil Impurity 21	1446089-82-2	RS-S019019	C28H34N6O4S	550.67
Sildenafil Impurity 61	1446089-84-4	RS-S019020	C19H20Cl2N4O2	407.29
Sildenafil Impurity 47	1446144-70-2	RS-S019021	C25H32N6O4	480.56
Sildenafil Impurity 27	1467610-68-9	RS-S019022	C18H21ClN4O4S	424.9
Sildenafil Impurity 52	147676-79-7	RS-S019023	C23H30N6O3	438.52
Sildenafil Impurity 31	1610830-81-3	RS-S019024	C22H28N6OS2	456.63
Sildenafil Impurity 2	1829588-57-9	RS-S019025	C17H19ClN4O2	346.81
Sildenafil Impurity 33	1971915-89-5	RS-S019026	C19H24N4O5S	420.48
Sildenafil Impurity 17	268204-00-8	RS-S019027	C9H16N4O	196.25
Sildenafil Impurity 20	479073-80-8	RS-S019028	C23H32N6O3S2	504.67
Sildenafil Impurity 10	62871-12-9	RS-S019029	C9H9ClO3	200.62
Sildenafil EP Impurity B	1094598-75-0	RS-S019001	C22H30N6O5S	490.58

Structures

Sildenafil Impurity 56

CAS 1185292-79-8RS-S019002
COA per lot
Sildenafil Impurity 44

CAS 1308332-48-0RS-S019003
COA per lot
Sildenafil Impurity 30

CAS 1333233-46-7RS-S019004
COA per lot
Sildenafil EP Impurity G

CAS 1346602-67-2RS-S019005
COA per lot
Sildenafil EP Impurity D

CAS 1357931-55-5RS-S019006
COA per lot
Sildenafil EP Impurity A

CAS 1391053-95-4RS-S019007
COA per lot
Sildenafil EP Impurity F

CAS 139755-82-1RS-S019008
COA per lot
Sildenafil Impurity 10

CAS 139755-95-6RS-S019009
COA per lot

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