desloratadine and its Impurities
An active metabolite of loratadine, Desloratadine is a tricyclic non sedative type H1-antihistamine which is used to treat allergies and congestion. Also helps in treating acne. Reference standards of Desloratadine API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below

![4-(8-Chloro-5,6-dihydro-benzo[5,6]cyclohepta[1,2-b PA 04 14530](https://www.pharmaffiliates.com/pimages/PA0414530.jpg)
4-(8-Chloro-5,6-dihydro-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-piperidine-1-carbaldehyde
4-(8-Chloro-5,6-dihydro-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-piperidine-1-carbaldehyde
Catalogue No.:PA 04 14530
CAS :
117810-61-4
Molecular Formula : C20H19ClN2O
Molecular Weight : 338.83


Desloratadine Related Compound A (8-Bromo-6,11-dihydro-11-(piperidin-4-ylidene)-5H-benzo[5,6]cycloh (1173053)
Desloratadine Related Compound A (8-Bromo-6,11-dihydro-11-(piperidin-4-ylidene)-5H-benzo[5,6]cycloh (1173053)
Catalogue No.:PA USP1173053
CAS :
117796-50-6
Molecular Formula : NA
Molecular Weight : NA


Desloratadine Related Compound F (8-Chloro-6,11-dihydro-11-(N-formyl-4-piperidinylidene) -5H-benzo[ (1173064)
Desloratadine Related Compound F (8-Chloro-6,11-dihydro-11-(N-formyl-4-piperidinylidene) -5H-benzo[ (1173064)
Catalogue No.:PA USP1173064
CAS :
117810-61-4
Molecular Formula : NA
Molecular Weight : NA


Desloratadine Related Compound B (8-chloro-11-(1,2,3,6-tetrahydropyridin-4-yl)-6,11-dihydro-5H-benz (1173086)
Desloratadine Related Compound B (8-chloro-11-(1,2,3,6-tetrahydropyridin-4-yl)-6,11-dihydro-5H-benz (1173086)
Catalogue No.:PA USP1173086
CAS :
NA
Molecular Formula : NA
Molecular Weight : NA

![4-(8-Chloro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin- PAI 04 004010](https://www.pharmaffiliates.com/pimages/PAI04004010.jpg)
4-(8-Chloro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin-11(6H)-ylidene)piperidin-1-yl benzoperoxoate
4-(8-Chloro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin-11(6H)-ylidene)piperidin-1-yl benzoperoxoate
Catalogue No.:PAI 04 004010
CAS :
NA
Molecular Formula : C26H23ClN2O3
Molecular Weight : 446.93


Ethyl 4-(5-bromo-8-chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)piperidine-1-carboxylate
Ethyl 4-(5-bromo-8-chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)piperidine-1-carboxylate
Catalogue No.:PAI 04 004060
CAS :
NA
Molecular Formula : C22H22BrClN2O2
Molecular Weight : 461.78


8-Chloro-11-fluoro-11-(1-methylpiperidin-4-yl)-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridine
8-Chloro-11-fluoro-11-(1-methylpiperidin-4-yl)-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridine
Catalogue No.:PA 04 0141004
CAS :
125743-81-9
Molecular Formula : C20H22ClFN2
Molecular Weight : 344.86

![4-(8-Chloro-6,11-dihydro-5H-benzo[5,6]cyclohepta[1 PA 04 0141005](https://www.pharmaffiliates.com/pimages/PA040141005.jpg)
4-(8-Chloro-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-yl)-3-pyridinol 1-oxide
4-(8-Chloro-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-yl)-3-pyridinol 1-oxide
Catalogue No.:PA 04 0141005
CAS :
1193725-75-5
Molecular Formula : C19H15ClN2O2
Molecular Weight : 338.79