mometasone and its Impurities
Mometasone is used to treat skin conditions such as eczema, psoriasis, allergies, and rash. Mometasone decreases swelling, itching, and redness. It is available as a generic medication.Reference standards of Mometasone API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


(8S,9R,10S,11S,13S,14S,16R,17R)-9-Chloro-17-(2-chloroacetyl)-11-hydroxy-6,10,13,16-tetramethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
(8S,9R,10S,11S,13S,14S,16R,17R)-9-Chloro-17-(2-chloroacetyl)-11-hydroxy-6,10,13,16-tetramethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
Catalogue No.:PA 13 60560
CAS :
1370190-55-8
Molecular Formula : C28H32Cl2O6
Molecular Weight : 535.46


(4aS,4bS,5aS,6aS,7R,8S)-7-(2-Chloroacetyl)-7-hydroxy-4a,6a,8-trimethyl-5a,6,6a,7,8,9,9a,9b,10,11-decahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-2(4aH)-one
(4aS,4bS,5aS,6aS,7R,8S)-7-(2-Chloroacetyl)-7-hydroxy-4a,6a,8-trimethyl-5a,6,6a,7,8,9,9a,9b,10,11-decahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-2(4aH)-one
Catalogue No.:PAI 13 003010
CAS :
NA
Molecular Formula : C22H27ClO4
Molecular Weight : 390.90


(4aS,4bS,5aS,6aS,7R,8S)-7-(2-Chloroacetyl)-4a,6a,8-trimethyl-2-oxo-2,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-7-yl furan-2-carboxylate
(4aS,4bS,5aS,6aS,7R,8S)-7-(2-Chloroacetyl)-4a,6a,8-trimethyl-2-oxo-2,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-7-yl furan-2-carboxylate
Catalogue No.:PAI 13 003020
CAS :
NA
Molecular Formula : C27H29ClO6
Molecular Weight : 485.00


(8S,9R,10S,11S,13S,14S,16R,17R)-6-acetoxy-9-chloro-17-(2-chloroacetyl)-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
(8S,9R,10S,11S,13S,14S,16R,17R)-6-acetoxy-9-chloro-17-(2-chloroacetyl)-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
Catalogue No.:PAI 13 003030
CAS :
NA
Molecular Formula : C29H32Cl2O8
Molecular Weight : 579.47


(9R,10S,11S,13S,16R,17R)-9-Chloro-17-(2-chloroacetyl)-6,11-dihydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
(9R,10S,11S,13S,16R,17R)-9-Chloro-17-(2-chloroacetyl)-6,11-dihydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
Catalogue No.:PAI 13 003060
CAS :
NA
Molecular Formula : C27H30Cl2O7
Molecular Weight : 537.40


(8S,10R,11S,13S,14S,16R,17R)-17-(2-Chloroacetyl)-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
(8S,10R,11S,13S,14S,16R,17R)-17-(2-Chloroacetyl)-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
Catalogue No.:PAI 13 003070
CAS :
NA
Molecular Formula : C27H31ClO6
Molecular Weight : 486.98


2-((4aS,4bS,5aS,6aS,7R,8R)-7-Hydroxy-4a,6a,8-trimethyl-2-oxo-2,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-7-yl)-2-oxoethyl Methanesulfonate
2-((4aS,4bS,5aS,6aS,7R,8R)-7-Hydroxy-4a,6a,8-trimethyl-2-oxo-2,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-7-yl)-2-oxoethyl Methanesulfonate
Catalogue No.:PAI 13 003080
CAS :
NA
Molecular Formula : C23H30O7S
Molecular Weight : 450.55


(4aS,4bS,5aS,6aS,7S,8R)-7-Hydroxy-7-((4S)-3-hydroxy-2,2-dioxido-1,2-oxathiolan-4-yl)-4a,6a,8-trimethyl-5a,6,6a,7,8,9,9a,9b,10,11-decahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-2(4aH)-one
(4aS,4bS,5aS,6aS,7S,8R)-7-Hydroxy-7-((4S)-3-hydroxy-2,2-dioxido-1,2-oxathiolan-4-yl)-4a,6a,8-trimethyl-5a,6,6a,7,8,9,9a,9b,10,11-decahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-2(4aH)-one
Catalogue No.:PAI 13 003090
CAS :
NA
Molecular Formula : C23H30O7S
Molecular Weight : 450.55


(4aS,4bS,5aS,6aS,7R,8R)-7-(2,2-Dioxido-5H-1,2-oxathiol-4-yl)-4a,6a,8-trimethyl-2-oxo-2,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-7-yl furan-2-carboxylate
(4aS,4bS,5aS,6aS,7R,8R)-7-(2,2-Dioxido-5H-1,2-oxathiol-4-yl)-4a,6a,8-trimethyl-2-oxo-2,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-7-yl furan-2-carboxylate
Catalogue No.:PAI 13 003100
CAS :
NA
Molecular Formula : C28H30O8S
Molecular Weight : 526.60


(9R,10S,11S,13S,16R,17R)-9-chloro-17-(2,2-dioxido-5H-1,2-oxathiol-4-yl)-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
(9R,10S,11S,13S,16R,17R)-9-chloro-17-(2,2-dioxido-5H-1,2-oxathiol-4-yl)-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
Catalogue No.:PAI 13 003110
CAS :
NA
Molecular Formula : C28H31ClO8S
Molecular Weight : 563.06


(9R,10S,13S,16R,17R)-9-Chloro-17-(2-chloroacetyl)-10,13,16-trimethyl-3,11-dioxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
(9R,10S,13S,16R,17R)-9-Chloro-17-(2-chloroacetyl)-10,13,16-trimethyl-3,11-dioxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
Catalogue No.:PAI 13 003120
CAS :
NA
Molecular Formula : C27H28Cl2O6
Molecular Weight : 519.41


(8S,9R,10S,13S,14S,16R,17R)-9-Chloro-17-(2-chloroacetyl)-10,13,16-trimethyl-3,11-dioxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
(8S,9R,10S,13S,14S,16R,17R)-9-Chloro-17-(2-chloroacetyl)-10,13,16-trimethyl-3,11-dioxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
Catalogue No.:PA 13 60580
CAS :
NA
Molecular Formula : C27H28Cl2O6
Molecular Weight : 519.42


9,21-Dichloro-11b-hydroxy-16α-methyl-3,20-dioxopregna-1,4-dien-17-yl 5-chloro furan 2-carboxylate;
9,21-Dichloro-11b-hydroxy-16α-methyl-3,20-dioxopregna-1,4-dien-17-yl 5-chloro furan 2-carboxylate;
Catalogue No.:PA 13 0601004
CAS :
NA
Molecular Formula : C27H29Cl3O6
Molecular Weight : 555.87


(10R,13S,16R,17R)-17-(2-Chloroacetyl)-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-3-carboxylate
(10R,13S,16R,17R)-17-(2-Chloroacetyl)-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-3-carboxylate
Catalogue No.:PAI 13 003121
CAS :
NA
Molecular Formula : C27H31ClO6
Molecular Weight : 486.99


(8S,9S,10R,13S,14S,16R,17R)-17-(2-Chloroacetyl)-17-hydroxy-10,13,16-trimethyl-7,8,9,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthrene-3,11(6H)-dione
(8S,9S,10R,13S,14S,16R,17R)-17-(2-Chloroacetyl)-17-hydroxy-10,13,16-trimethyl-7,8,9,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthrene-3,11(6H)-dione
Catalogue No.:PAI 13 003122
CAS :
2305584-90-9
Molecular Formula : C22H27ClO4
Molecular Weight : 390.9


2-((8R)-11-Bromo-7-hydroxy-4a,6a,8-trimethyl-2-oxo-2,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-7-yl)-2-oxoethyl Acetate
2-((8R)-11-Bromo-7-hydroxy-4a,6a,8-trimethyl-2-oxo-2,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-7-yl)-2-oxoethyl Acetate
Catalogue No.:PAI 13 003123
CAS :
NA
Molecular Formula : C24H29BrO6
Molecular Weight : 493.39


2-((8R,11S)-7-Hydroxy-4a,6a,8,11-tetramethyl-2-oxo-2,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-7-yl)-2-oxoethyl Acetate
2-((8R,11S)-7-Hydroxy-4a,6a,8,11-tetramethyl-2-oxo-2,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-7-yl)-2-oxoethyl Acetate
Catalogue No.:PAI 13 003124
CAS :
NA
Molecular Formula : C25H32O6
Molecular Weight : 428.53


2-((6S,16R)-9-Chloro-11,17-dihydroxy-6,10,13,16-tetramethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl Acetate
2-((6S,16R)-9-Chloro-11,17-dihydroxy-6,10,13,16-tetramethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl Acetate
Catalogue No.:PAI 13 003125
CAS :
NA
Molecular Formula : C25H33ClO6
Molecular Weight : 464.98


(6S,16R)-9-Chloro-11,17-dihydroxy-17-(2-hydroxyacetyl)-6,10,13,16-tetramethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-3-one
(6S,16R)-9-Chloro-11,17-dihydroxy-17-(2-hydroxyacetyl)-6,10,13,16-tetramethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-3-one
Catalogue No.:PAI 13 003126
CAS :
NA
Molecular Formula : C23H31ClO5
Molecular Weight : 422.95


(6S,16R)-9-Chloro-17-(2-chloroacetyl)-11,17-dihydroxy-6,10,13,16-tetramethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-3-one
(6S,16R)-9-Chloro-17-(2-chloroacetyl)-11,17-dihydroxy-6,10,13,16-tetramethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-3-one
Catalogue No.:PAI 13 003127
CAS :
NA
Molecular Formula : C23H30Cl2O4
Molecular Weight : 441.39


(4aS,6aS,7R,8S)-7-(2-Acetoxyacetyl)-4a,6a,8-trimethyl-2-oxo-2,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-7-yl furan-2-carboxylate
(4aS,6aS,7R,8S)-7-(2-Acetoxyacetyl)-4a,6a,8-trimethyl-2-oxo-2,4a,5a,6,6a,7,8,9,9a,9b,10,11-dodecahydrocyclopenta[1,2]phenanthro[4,4a-b]oxiren-7-yl furan-2-carboxylate
Catalogue No.:PAI 13 003128
CAS :
NA
Molecular Formula : C29H32O8
Molecular Weight : 508.57


(9R,10S,11S,13S,16S,17R)-17-(2-Acetoxyacetyl)-9-chloro-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
(9R,10S,11S,13S,16S,17R)-17-(2-Acetoxyacetyl)-9-chloro-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl furan-2-carboxylate
Catalogue No.:PAI 13 003129
CAS :
NA
Molecular Formula : C29H33ClO8
Molecular Weight : 545.03