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Impurity structure Parent Drug Name Name of Impurity Catalogue No. CAS No.
Alfuzosin EP Impurity B Alfuzosin / Terazosin / Prazosin / Doxazosin

Alfuzosin EP Impurity B

VL259008 23680-84-4
Amiloride EP Impurity B Amiloride

Amiloride EP Impurity B

VL4630002 4878-36-8
Amiodarone EP Impurity D Amiodarone

Amiodarone EP Impurity D

VL1390005 1951-26-4
Amiodarone EP Impurity E Amiodarone

Amiodarone EP Impurity E

VL1390006 52490-15-0
Amiodarone EP Impurity H Amiodarone

Amiodarone EP Impurity H

VL1390008 869-24-9
Amlodipine EP Impurity A Amlodipine

Amlodipine EP Impurity A

VL19004 88150-62-3
Azelastine EP Impurity A Azelastine

Azelastine EP Impurity A

VL1100001 613-94-5
Azelastine EP Impurity C Azelastine

Azelastine EP Impurity C

VL1100003 53242-76-5
Benzydamine EP Impurity G Benzydamine

Benzydamine EP Impurity G

VE008536 109-54-6
Butyl Parahydroxybenzoate EP Impurity C Butyl Parahydroxybenzoate / Methyl Parahydroxybenzoate / Propyl Paraben

Butyl Parahydroxybenzoate EP Impurity C

VE006649 120-47-8
Caffeine EP Impurity D Caffeine / Pentoxifylline

Caffeine EP Impurity D

VL3710004 83-67-0
Capecitabine EP Impurity A Capecitabine

Capecitabine EP Impurity A

VL243001 66335-38-4
Capecitabine EP Impurity B Capecitabine

Capecitabine EP Impurity B

VL243002 3094-09-5
Carbidopa EP Impurity A Carbidopa

Carbidopa EP Impurity A

VL420005 555-30-6
Cyclophosphamide Related Compound A Cyclophosphamide

Cyclophosphamide Related Compound A

VL165001 821-48-7
Diltiazem EP Impurity E Diltiazem

Diltiazem EP Impurity E

VL1080003 42399-49-5
Doxycycline EP Impurity B (HCl salt) Doxycycline

Doxycycline EP Impurity B (HCl salt)

VL159005 3963-95-9
Doxycycline EP Impurity E Doxycycline

Doxycycline EP Impurity E

VE006199 79-57-2
Febuxostat Impurity 5 Febuxostat

Febuxostat Impurity 5

VE0015917 161798-02-3
Fluconazole Impurity 7 Fluconazole

Fluconazole Impurity 7

VL60007 1774-47-6
Glimepiride EP Impurity B Glimepiride

Glimepiride EP Impurity B

VL71002 119018-29-0
Glycopyrrolate Related Compound C Glycopyrrolate

Glycopyrrolate Related Compound C

VL3880002 427-49-6
Glycopyrronium Bromide Impurity J Glycopyrronium

Glycopyrronium Bromide Impurity J

VL3880002 427-49-6
Imatinib EP Impurity F Imatinib

Imatinib EP Impurity F

VL272008 152460-10-1
Isotretinoin EP Impurity A Isotretinoin

Isotretinoin EP Impurity A

VE006916 302-79-4
Levocetirizine Chlorobenzhydryl Piperazine Levocetirizine

Levocetirizine Chlorobenzhydryl Piperazine

VL1550016 300543-56-0
Lisinopril EP Impurity B Lisinopril / Tizanidine / Anastrozole / Sultamicillin

Lisinopril EP Impurity B

VL600003 6192-52-5
Loratadine Impurity 36 Loratadine

Loratadine Impurity 36

VE0019526 5570-77-4
Mefenamic Acid EP Impurity D Mefenamic

Mefenamic Acid EP Impurity D

VL2950003 65-85-0
Mesalazine EP Impurity M Mesalazine

Mesalazine EP Impurity M

VL98015 2516-96-3
Metronidazole EP Impurity B Metronidazole

Metronidazole EP Impurity B

VE008074 3034-38-6
Minoxidil EP Impurity A Minoxidil

Minoxidil EP Impurity A

VL2630001 35139-67-4
Montelukast Quid- 8 Impurity Mitomycin

Mitomycin EP Impurity A

VE0020295 621-79-4
N2,N6-Di-Boc-L-Lysine 4-Nitrophenyl Ester Lysine

N2,N6-Di-Boc-L-Lysine 4-Nitrophenyl Ester

VE0019684 2592-19-0
Naproxen EP Impurity E Naproxen

Naproxen EP Impurity E

VL540003 26159-35-3
Naproxen EP Impurity K Naproxen

Naproxen EP Impurity K

VL5400012 77301-42-9
Naproxen EP Impurity L Naproxen

Naproxen EP Impurity L

VL540002 3900-45-6
Naproxen Related Compound A Naproxen

Naproxen Related Compound A

VL5400011 2471-70-7
Nicardipine Related Compound C Nicardipine

Nicardipine Related Compound C

VL4430001 21881-77-6
Nilotinib EP Impurity B Nilotinib

Nilotinib EP Impurity B

VE009189 18595-18-1
Nilotinib EP Impurity C Nilotinib

Nilotinib EP Impurity C

VE009190 2458-12-0
Olopatadine Related Compund C Olopatadine

Olopatadine Related Compund C

VL720004 55453-87-7
Omeprazole EP Impurity A Omeprazole / Esomeprazole

Omeprazole EP Impurity A

VL112002 37052-78-1
Phenylephrine EP Impurity E (HCl Salt) Phenylephrine

Phenylephrine EP Impurity E (HCl Salt)

VL115002 71786-67-9
Pyridine-3-sulfonyl chloride -

Pyridine-3-sulfonyl chloride

VE009493 16133-25-8
Sitagliptin Acid Sitagliptin

Sitagliptin Acid

VE006432 936630-57-8
Sitagliptin Enamine Impurity Sitagliptin

Sitagliptin Enamine Impurity

VL201014 767340-03-4
Sitagliptin Keto Amide Impurity Sitagliptin

Sitagliptin Keto Amide Impurity

VL201015 764667-65-4
Sitagliptin Triazole Impurity Sitagliptin

Sitagliptin Triazole Impurity

VL201012 762240-92-6
Sulpiride EP Impurity D Sulpiride

Sulpiride EP Impurity D

VL139001 22117-85-7