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Pharmaceutical Impurity Reference Standards
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- Chemical Name:Cinacalcene Impurity I
- CAS:
- MF:
- Structure:

- Chemical Name:Valsartan Impurity 2
- CAS:
- MF:C24H29N5O3
- Chemical Name:Istradefylline Impurity 2
- CAS:
- MF:
- Chemical Name:Etoricoxib Impurity 3
- CAS:
- MF:
- Structure:

- Chemical Name:Apremilast Impurity 5
- CAS:200710-04-9
- MF:C11H13NO4
- Chemical Name:Topiroxostat Imp.C
- CAS:
- MF:
- Structure:

- Chemical Name:(3R,4S)-1-(4-chlorophenyl)-3-((S)-3-(4-fluorophenyl)-3-hydroxypropyl)-4-(4-hydroxyphenyl)azetidin-2-one
- CAS:1700622-08-7
- MF:C24H21ClFNO3
- Structure:

- Chemical Name:Rabeprazole Impurity 2
- CAS:1163685-31-1
- MF:C11H15NO4
- Chemical Name:Regorafenib Impurity 8
- CAS:
- MF:
- Structure:

- Chemical Name:Flomoxef Impurity 5
- CAS:134237-56-2
- MF:C25H23ClF2N2O6S
- Structure:

- Chemical Name:Ranitidine impurity
- CAS:94167-82-5
- MF:C10H18N2O
- Chemical Name:nicergoline impurity E
- CAS:
- MF:
- Structure:

- Chemical Name:ethyl(2R,4S)-5-([1,1'-biphenyl]-4-yl)-4-(4-ethoxy-4-oxobutanamido)-2-methylpentanoate
- CAS:
- MF:C26H33NO5
- Chemical Name:Tacrolimus Impurity C
- CAS:
- MF:
- Chemical Name:Levodopa impurity 5
- CAS:
- MF:
- Structure:

- Chemical Name:(R)-N-(5-((R)-2-(2,5-difluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidin-3-yl)-3-hydroxypyrrolidine-1-carboxamide
- CAS:1223404-68-9
- MF:C21H22F2N6O2
- Structure:

- Chemical Name:Afatinib Impurity 18
- CAS:2316847-95-5
- MF:C22H20ClFN4O4
- Structure:

- Chemical Name:Ivabradine Impurity 1 Hydrochloride
- CAS:85175-52-6
- MF:C16H25ClN2O3
- Chemical Name:SofosBuvir Impurity 3
- CAS:
- MF:
- Structure:

- Chemical Name:phenyl (4-((6-carbamoyl-7-methoxyquinolin-4-yl)oxy)-2-chlorophenyl)carbamate
- CAS:417722-95-3
- MF:C24H18ClN3O5
- Structure:

- Chemical Name:Canagliflozin Impurity 10
- CAS:1672658-93-3
- MF:C24H25FO6S
- Chemical Name:Canagliflozin Impurity F
- CAS:
- MF:
- Chemical Name:Empagliflozin impurity E
- CAS:
- MF:
- Structure:

- Chemical Name:Fasudil Impurity 6
- CAS:2044706-58-1
- MF:C11H11NO3S
- Structure:

- Chemical Name:Ibrutinib Impurity 11
- CAS:
- MF:C27H31N7O2
- Structure:

- Chemical Name:Nintedanib impurity I
- CAS:334951-61-0
- MF:C30H31N5O4
- Structure:

- Chemical Name:(Z)-3-(hydroxy(phenyl)methylene)-2-oxoindoline-6-carboxylic acid compound with 3-benzoyl-2-oxoindoline-6-carboxylic acid
- CAS:1253768-91-0
- MF:C16H11NO4
- Structure:

- Chemical Name:Everolimus Related Compound 3
- CAS:147438-30-0
- MF:C32H49NO9
- Structure:

- Chemical Name:(R)-isopropyl 2-(((R)-(perfluorophenoxy)(phenoxy)phosphoryl)amino)propanoate
- CAS:1627824-09-2
- MF:C18H17F5NO5P
- Structure:

- Chemical Name:Cefuroxime Sodium EP Impurity C
- CAS:69822-88-4
- MF:C15H15N3O6S
- Structure:

- Chemical Name:Acemetacin EP Impurity F/Carboxymethyl Acemetacin/[[[[[1-(4-Chlorobenzoyl)-5-methoxy-2-methyl-1H-indol-3-yl]acetyl]oxy]acetyl]oxy]acetic acid
- CAS:76812-49-2
- MF:C23H20ClNO8
- Structure:

- Chemical Name:Cefuroxime Sodium EP Impurity G
- CAS:97232-98-9
- MF:C17H17N3O8S
- Structure:

- Chemical Name:2-chloro-4-(cyclopentylamino)-5-pyrimidinyl ethanone
- CAS:1244949-62-9
- MF:C11H14ClN3O
- Structure:

- Chemical Name:Cetirizine 3-Chloro Impurity
- CAS:1232460-31-9
- MF:C21H25ClN2O3
- Structure:

- Chemical Name:Donepezil Impurity 8
- CAS:1808997-65-0
- MF:C18H23NO4
- Chemical Name:Rivaroxaban Impurity 23
- CAS:
- MF:
- Structure:

- Chemical Name:(Z)-2-(2-aminothiazol-4-yl)-2-(hydroxyimino)acetamide
- CAS:1450758-21-0
- MF:C5H6N4O2S
- Structure:

- Chemical Name:Fosfomycin Trometamol impurity C
- CAS:23001-39-0
- MF:C4H12NO6P
- Structure:

- Chemical Name:(R)-1-(3-(dimethylamino)propyl)-1-(4-fluorophenyl)-1,3-dihydroisobenzofuran-5-carbonitrile oxalate
- CAS:
- MF:C22H23FN2O5
- Structure:

- Chemical Name:1-(7,8-dihydronaphthalen-1-yl)ethan-1-amine hydrochloride
- CAS:1822601-94-4
- MF:C12H15N
- Structure:

- Chemical Name:Sofosbuvir metabolites
- CAS:1859162-80-3
- MF:C16H18FN2O8P
- Structure:

- Chemical Name:1,3,5,7-tetrahydroxyadamantane
- CAS:16104-28-2
- MF:C10H16O4
- Chemical Name:Cabozantinib Impurity E
- CAS:
- MF:
- Chemical Name:Loxoprofen Impurity I
- CAS:
- MF:
- Chemical Name:Sofosbuvir Impurity22
- CAS:
- MF:
- Structure:

- Chemical Name:Donepezil Impurity-OH
- CAS:148517-82-2
- MF:C11H12O4
- Structure:

- Chemical Name:1-[3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-4-(hydroxyamino)pyrimidin-2-one
- CAS:13491-41-3
- MF:C9H13N3O6
- Structure:

- Chemical Name:5-(hydroxymethyl)-3-[(5-nitro-2-furyl)methylideneamino]oxazolidin-2-one
- CAS:41359-15-3
- MF:C9H9N3O6
- Chemical Name:Axitinib Impurity 14
- CAS:
- MF:
- Chemical Name:Nicorandil Impurity 7
- CAS:
- MF:
- Structure:

- Chemical Name:Ritonavir EP Impurity T
- CAS:869368-48-9
- MF:C46H66N8O5S2
- Structure:

- Chemical Name:4-Methoxy-a-methyl-L-phenylalanine
- CAS:65555-88-6
- MF:C11H15NO3
- Structure:

- Chemical Name:Cyanocobalamin
- CAS:38218-55-2
- MF:C63H87CoN13O15P
- Chemical Name:Empagliflozin Impurity 44
- CAS:
- MF:
- Structure:

- Chemical Name:1,4,8,11- tetra(trifluoroacetyl)-1,4,8,11-tetraazacyclotetradecane
- CAS:201610-16-4
- MF:C18H20F12N4O4
- Structure:

- Chemical Name:5-bromo-4-(4-chlorothiophen-2-yl)thiazol-2-amine
- CAS:2161380-87-4
- MF:C7H4BrClN2S2
- Chemical Name:Zopiclone Impurity 11
- CAS:
- MF:
- Structure:

- Chemical Name:(3R,5S)-5-((R)-8-fluoro-4-isopropyl-2-(N-methylmethylsulfonam ido)-5,6-dihydrobenzo[h]quinazolin-6-yl)-3,5-dihydroxypentanoate calcium(II)
- CAS:854898-49-0
- MF:C44H54CaF2N6O12S2
- Structure:

- Chemical Name:Doxorubicin EP Impurity C HBr
- CAS:60873-68-9
- MF:C27H29Br2NO10
- Chemical Name:Ceftazidime Impurity K
- CAS:
- MF:
- Structure:

- Chemical Name:Furosemide Impurity 3
- CAS:
- MF:C12H11ClN2O5S
- Structure:

- Chemical Name:Nicorandil Impurity 13
- CAS:19416-51-4
- MF:C9H11NO3
- Chemical Name:Rosuvastatin Impurity 51
- CAS:
- MF:
- Structure:

- Chemical Name:Silodosin Impurity 3
- CAS:1402161-34-5
- MF:C29H31N3O2
- Chemical Name:Tenofovir Impurity 61
- CAS:
- MF:
- Structure:

- Chemical Name:Ticagrelor Impurity 70
- CAS:1824025-11-7
- MF:C10H9F2NO
- Structure:

- Chemical Name:Topiroxostat Impurity 21
- CAS:2044704-74-5
- MF:C13H7N5O
- Structure:

- Chemical Name:Mirabegron Impurity 17
- CAS:1684452-84-3
- MF:C31H32N8O4S3
- Chemical Name:Afatinib Impurity 24
- CAS:
- MF:
- Structure:

- Chemical Name:Amifostine Impurity 8
- CAS:66487-25-0
- MF:C5H10N2O
- Chemical Name:Bendamustine Impurity 33
- CAS:
- MF:
- Chemical Name:Bendamustine Impurity 38
- CAS:
- MF:
- Structure:

- Chemical Name:Ciprofloxacin Impurity 4
- CAS:
- MF:C17H18FN3O3
- Chemical Name:Dapagliflozin Impurity 29
- CAS:
- MF:
- Chemical Name:Erlotinib Impurity 52
- CAS:
- MF:
- Chemical Name:Etoposide Impurity 3
- CAS:
- MF:
- Chemical Name:Nintedanib Impurity 29
- CAS:
- MF:
- Chemical Name:Olaparib Impurity 23
- CAS:
- MF:
- Chemical Name:Oseltamivir Impurity 19
- CAS:
- MF:
- Structure:

- Chemical Name:Rocuronium bromide Impurity 30
- CAS:56240-11-0
- MF:C19H26O
- Chemical Name:Rocuronium Bromide Impurity 38
- CAS:
- MF:
- Structure:

- Chemical Name:S-Silodosin
- CAS:2182279-45-2
- MF:C25H32F3N3O4
- Structure:

- Chemical Name:Terazosin EP Impurity D
- CAS:102714-74-9
- MF:C15H19N5O3
- Structure:

- Chemical Name:Apremilast Impurity FA
- CAS:2077897-94-8
- MF:C21H22N2O7S
- Chemical Name:Atracurium Impurity S
- CAS:
- MF:
- Chemical Name:Mirabegron Impurity MADT
- CAS:
- MF:
- Chemical Name:Palbociclib Impurity 30
- CAS:
- MF:
- Structure:

- Chemical Name:Parecoxib Impurity Q
- CAS:1373038-58-4
- MF:C16H14N2O3S
- Chemical Name:Ropivacaine Impurity 30
- CAS:
- MF:
- Chemical Name:Ropivacaine Impurity 39
- CAS:
- MF:
- Chemical Name:Sugammadex sodium Org46643 Impurity
- CAS:
- MF:
- Chemical Name:Afatinib impurity 27
- CAS:
- MF:
- Structure:

- Chemical Name:Butyphthalide impurity 41
- CAS:1379166-79-6
- MF:C9H10O3
- Chemical Name:Butyphthalide impurity 47
- CAS:
- MF:
- Chemical Name:Dapoxetine impurity 19
- CAS:
- MF:
- Chemical Name:Empagliflozin Impurity KHC
- CAS:
- MF:
- Structure:

- Chemical Name:Febuxostat Impurity 70
- CAS:2418591-43-0
- MF:C16H16N2O3S
- Chemical Name:Febuxostat Impurity 92
- CAS:
- MF:
- Structure:

- Chemical Name:Fluconazole Impurity N
- CAS:
- MF:C13H12F2N6O
- Structure:

- Chemical Name:Ibrutinib Impurity 25
- CAS:2052279-48-6
- MF:C28H28N6O4