quetiapine and its Impurities
This compound is also known as QUETIAPINE DIMER present as an impurity in antipsychotic drug Quetiapine. Reference standards of Quetiapine API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

![2-[2-[2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-p PA STI 029880](https://www.pharmaffiliates.com/pimages/PASTI029880.jpg)
2-[2-[2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]ethoxy]ethoxy]-ethanol-d8 Fumarate
2-[2-[2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]ethoxy]ethoxy]-ethanol-d8 Fumarate
Catalogue No.:PA STI 029880
CAS :
2734435-09-5
Molecular Formula : C29H29D8N3O8S
Molecular Weight : 595.73

![2-[2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-pipe PA STI 029890](https://www.pharmaffiliates.com/pimages/PASTI029890.jpg)
2-[2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]ethoxy]ethanol-d8 Fumarate
2-[2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]ethoxy]ethanol-d8 Fumarate
Catalogue No.:PA STI 029890
CAS :
2734379-99-6
Molecular Formula : C27H25D8N3O7S
Molecular Weight : 551.68


11-(4-(2,2,3,3-Tetramethyl-4,7,10,13-tetraoxa-3-silapentadecan-15-yl)piperazin-1-yl)dibenzo[b,f][1,4]thiazepine
11-(4-(2,2,3,3-Tetramethyl-4,7,10,13-tetraoxa-3-silapentadecan-15-yl)piperazin-1-yl)dibenzo[b,f][1,4]thiazepine
Catalogue No.:PAI 17 001040
CAS :
NA
Molecular Formula : C31H47N3O4SSi
Molecular Weight : 585.87


Quetiapine System Suitability (Mixture contains Quetiapine Fumarate and about 1% each of Quetiapine (1592715)
Quetiapine System Suitability (Mixture contains Quetiapine Fumarate and about 1% each of Quetiapine (1592715)
Catalogue No.:PA USP1592715
CAS :
NA
Molecular Formula : NA
Molecular Weight : NA


Quetiapine Related Compound B (11-(Piperazin-1-yl)dibenzo[b,f][1,4]thiazepine dihydrochloride) (1592737)
Quetiapine Related Compound B (11-(Piperazin-1-yl)dibenzo[b,f][1,4]thiazepine dihydrochloride) (1592737)
Catalogue No.:PA USP1592737
CAS :
111974-74-4
Molecular Formula : NA
Molecular Weight : NA

![Quetiapine Related Compound H (4-(Dibenzo[b,f][1, PA USP1592792](https://www.pharmaffiliates.com/pimages/PAUSP1592792.jpg)
Quetiapine Related Compound H (4-(Dibenzo[b,f][1,4]thiazepin-11-yl)-1-[2-(2-hydroxyethoxy)ethyl]pip (1592792)
Quetiapine Related Compound H (4-(Dibenzo[b,f][1,4]thiazepin-11-yl)-1-[2-(2-hydroxyethoxy)ethyl]pip (1592792)
Catalogue No.:PA USP1592792
CAS :
1076199-40-0
Molecular Formula : NA
Molecular Weight : NA

![4-(5,5-Dioxidodibenzo[b,f][1,4]thiazepin-11-yl)-1- PA 17 0021015](https://www.pharmaffiliates.com/pimages/PA170021015.jpg)
4-(5,5-Dioxidodibenzo[b,f][1,4]thiazepin-11-yl)-1-(2-(2-hydroxyethoxy)ethyl)piperazine 1-oxide
4-(5,5-Dioxidodibenzo[b,f][1,4]thiazepin-11-yl)-1-(2-(2-hydroxyethoxy)ethyl)piperazine 1-oxide
Catalogue No.:PA 17 0021015
CAS :
2206606-97-3
Molecular Formula : C21H25N3O5S
Molecular Weight : 431.51

![4-(Dibenzo[b,f][1,4]thiazepin-11-yl)-1-(2-(2-hydro PA 17 0021012](https://www.pharmaffiliates.com/pimages/PA170021012.jpg)
4-(Dibenzo[b,f][1,4]thiazepin-11-yl)-1-(2-(2-hydroxyethoxy)ethyl)-1-(2-hydroxyethyl)piperazin-1-ium Bromide
4-(Dibenzo[b,f][1,4]thiazepin-11-yl)-1-(2-(2-hydroxyethoxy)ethyl)-1-(2-hydroxyethyl)piperazin-1-ium Bromide
Catalogue No.:PA 17 0021012
CAS :
NA
Molecular Formula : C23H30BrN3O3S
Molecular Weight : 508.48