Name of the Drug
Name of te impurity
CAS
Molecular Formula
Molecular Wt
Vortioxetine HBr
Vortioxetine
508233-74-7
C18H22N2S
298.45
1-(2-(o-tolylthio)phenyl)piperazine
1293489-71-0
C17H20N2S
284.43
1-(2-(m-tolylthio)phenyl)piperazine
1293489-69-6
C17H20N2S
284.43
1-(2-(p-tolylthio)phenyl)piperazine
508233-82-7
C17H20N2S
284.43
1-(2-((2,3-dimethylphenyl)thio)phenyl)piperazine
1293343-33-5
C18H22N2S
298.45
1-(2-(2,6-dimethylphenylthio)phenyl)piperazine
C18H22N2S
299.45
1-(2-(3,4-dimethylphenylthio)phenyl)piperazine
C18H22N2S
300.45
1,2-bis(2,4-dimethylphenyl)disulfane
13616-83-6
C16H18S2
274.44
2,4‐dimethyl‐1‐(phenylsulfanyl)benzene
16704-47-5
C14H14S
214.33
1-[2-[(2,4-Dimethylphenyl)sulfinyl]phenyl]piperazine (Vortioxetine Sulfoxide)
1429908-35-9
C18H22N2OS
314.45
Pazopanib
5-amino-2-methyl benzene sulphonamide
6973–09-7
C7H10N2O2S
186.23
N-(2-Chloropyrimidin-4-yl)N-2,3-trimethyl-2H-indazol-6-amine
444731-75-3
C14H14ClN5
288
1,3-Dimethylindazol-6-amine
221681-92-1
C10H13N2
161.21
2,3-Dimethyl-6-amino-2H-indazole Hydrochloride
635702-60-2
C9H12ClN3
197.67
2,3-Dimethyl-6-nitro-2H-indazole
444731-73-1
C9H9N3O2
191.19
6-Chloropyrimidin-2(1H)-one
80927-55-5
C4H3ClN2O
130.53
Pazopanib Related Compound 2
1226500-02-2
C26H23ClN10
510.99
Pazopanib Related Compound 3
1252927-44-8
C27H25ClN10
525.02
Pazopanib Related Compound 4
6274-28-8
C7H10N2O2S
186.23
Prazosin HCl
Prazosin  Impurity A (4-Amino-2-chloro-6,7-dimethoxyquinazoline)
23680-84-4
C10H10ClN3O2
239.66
Prazosin Impurity B (1,4-Bis(furan-2-ylcarbonyl)piperazine)
31350-27-3
C14H14N2O4
274.27
Prazosin  Impurity C (2-Piperazine-4-amino-6,7-dimethoxyquinazoline)
60547-97-9
C14H19N5O2
289.3
Prazosin  Impurity D- 1-(2-Furoyl)piperazine
40172-95-0
C9H12N2O2
180.2
PRAZOSIN – IMPURITY E – 2,2′-(PIPERAZIN-1,4-DIYL)BIS- (6,7-DIMETHOXYQUINAZOLIN-4-AMINE)
102839-00-9
C24H28N8O4
492.53
2-Chloro-6,7-dimethoxyquinazolin-4-yl Chloride
27631-29-4
C10H8Cl2N2O2
259.1
6,7-Dimethoxy-2,4(1H,3H)-quinazolinedione
28888-44-0
C10H10N2O4
222.2
Prazosin HCl
19237-84-4,
C19H21N5O4·HCl
383.4
Doxazosin
Doxazosin – impurity A (1,4-Benzodioxan-2-carboxylic acid)
3663-80-7, 34385-93-8
C9H8O4
180.16
Doxazosin – impurity B    N-(1,4-Benzodioxane-2-carbonyl)piperazine hydrochloride
70918-74-0
C13H16N2O3
248.28
Doxazosin – impurity C     N,N-bis(1,4-Benzodioxane-2-carbonyl)piperazine
617677-53-9
C22H22N2O6
410.43
Doxazosin – impurity D  6,7-Dimethoxy-2,4(1H,3H)-quinazolinedione
28888-44-0
C10H10N2O4
222.2
Doxazosin – impurity E   2-Chloro-6,7-dimethoxyquinazolin-4-yl Chloride
27631-29-4
C10H8Cl2N2O2
259.1
Doxazosin – impurity F  (4-Amino-2-chloro-6,7-dimethoxyquinazoline)
23680-84-4
C10H10ClN3O2
239.66
Doxazosin  Impurity G (2-Piperazine-4-amino-6,7-dimethoxyquinazoline)
60547-97-9
C14H19N5O2
289.3
Doxazosin  Impurity -H    2,2′-(Piperazin-1,4-diyl)bis- (6,7-dimethoxyquinazolin-4-amine)
102839-00-9
C24H28N8O4
492.53
Alfuzosin
Alfuzosin Tetradehydro Impurity (Alfuzosin EP Impurity A)
98902-36-4, 98902-29-5 (HCl Salt)
C19H23N5O4 
385.42
Alfuzosin EP Impurity B
23680-84-4
C10H10ClN3O2
239.66
Alfuzosin EP Impurity C -N-[3-[(4-Amino-6,7-dimethoxyquinazolin-2-yl)amino]propyl]-N-methyltetrahydrofuran-2-carboxamide hydrochloride
98902-34-2
C19H27N5O4
389.46
Alfuzosin EP Impurity D, Alfuzosin Aminopropyl
81403-69-2 (HCl Salt),76362-29-3
C14H21N5O2
291.36
Alfuzosin EP Impurity E, N-[3-[(4-Amino-6,7-dimethoxyquinazolin-2-yl)(methyl)amino]propyl]formamide hydrochloride
1026411-59-5
C15H21N5O3. HCl 
319.37
6,7-dimethoxy-N2,N2-dimethylquinazoline-2,4-diamine
19216-53-6
C12H16N4O2
248.29

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