Impurity standards
Impurity Types
Reference standards grouped by impurity classification: EP impurities, nitrosamines, process impurities, degradants and USP related compounds.
4-(N-1-Dimethylaminonaphthalene-5-sulfonylamino)phenyl Isothiocyanate
CAS102417-94-7
Cat. no.D461000
Purity
COA on file
Cefaclor Degradation A Impurity (H-D-Phg-Gly-OH)
CAS6453-64-1
Cat. no.C4X-127044
Purity>90%
COA on file
Omeprazole EP Impurity D (Omeprazole USP Related Compound A, Omeprazole Sulfone)
CAS88546-55-8
Cat. no.O-022
Purity
COA on file
N-Nitroso-N,N-Di(3,5,5-Trimethylhexyl)Amine
CAS1207995-62-7
Cat. no.CCHM700955
Purity>85%
COA on file
Orlistat USP Related Compound (Orlistat open ring epimer)
CAS130793-28-1
Cat. no.C4X-14998
Purity>90%
COA on file
3,3,4-Trimethyl-1-(1-(2-morpholinoethyl)-1H-indol-3-yl)pent-4-en-1-one
CAS1616469-10-3
Cat. no.T796420
Purity
COA on file
![DBD-NCS[=4-(N,N-Dimethylaminosulfonyl)-7-isothiocyanato-2,1,3-benzoxadiazole] [for HPLC Labeling and Edman Degradation] chemical structure](/upload/struct/thumb_pc_C1315383.png)
DBD-NCS[=4-(N,N-Dimethylaminosulfonyl)-7-isothiocyanato-2,1,3-benzoxadiazole] [for HPLC Labeling and Edman Degradation]
CAS147611-81-2
Cat. no.C1315383
Purity
COA on file
![N-[(6R)-8-Fluoro-5,6-dihydro-4-(1-methylethyl)-6-[(2S,4R)-tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl]benzo[h]quinazolin-2-yl]-N-methylmethanesulfonamide chemical structure](/upload/struct/thumb_pc_F591040.png)
N-[(6R)-8-Fluoro-5,6-dihydro-4-(1-methylethyl)-6-[(2S,4R)-tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl]benzo[h]quinazolin-2-yl]-N-methylmethanesulfonamide
CAS
Cat. no.F591040
Purity
COA on file
Amoxicillin EP Impurity A(Sulbactam EP Impurity B)
CAS551-16-6
Cat. no.C4X-11482
Purity>95%
COA on file
Cefadroxil EP Impurity A(Amoxicillin EP Impurity I)
CAS22818-40-2
Cat. no.C4X-11492
Purity>95%
COA on file
Citalopram EP Impurity B (Escitalopram EP Impurity B )
CAS411221-53-9
Cat. no.C4X-11095
Purity>95%
COA on file
Rabeprazole EP Impurity H(Lansoprazole EP Impurity F)
CAS168167-42-8
Cat. no.C4X-11136
Purity>95%
COA on file
Clopidogrel Metabolite I (Mixture of Diastereomers)
CAS767612-34-0
Cat. no.C4X-102937
Purity
COA on file
Guaifenesin Metabolite (Glyceryl Guaiacolate Metabolite)
CAS13057-65-3
Cat. no.CP111176
Purity>95%
COA on file
Ramelteon Metabolite M-II-d3 (Mixture of R and S at the Hydroxy Position)
CAS1246812-22-5
Cat. no.C4X-26223
Purity>95%
COA on file
(4R)-N-Nitroso Thiazolidine-4-carboxylic Acid
CAS86594-16-3
Cat. no.CCHM704606
Purity>95%
COA on file
(R)-2-((S)-1-Nitrosopiperidin-2-yl)-2-phenylacetic Acid
CAS24321-27-5
Cat. no.C3D-26138
Purity
COA on file
(S)-1-(3-methyl-4-nitrosopiperazin-1-yl)prop-2-en-1-one
CAS
Cat. no.C3D-262114
Purity>95%
COA on file
(S)-1-nitroso-5-oxopyrrolidine-2-carboxylic acid
CAS80754-96-7
Cat. no.C3D-262271
Purity
COA on file
(S)-Methyl 2-(2-chlorophenyl)-2-((2-(3-formylthiophen-2-yl)ethyl)(nitroso)amino)acetate
CAS
Cat. no.C3D-26208
Purity>95%
COA on file
(S)-Methyl 2-(2-chlorophenyl)-2-(nitroso((2-(2-oxoethyl)thiophen-3-yl)methyl)amino)acetate
CAS
Cat. no.C3D-26209
Purity>95%
COA on file
1,1,1-trimethyl-N-Nitroso-N-(trimethylsilyl)Silanamine
CAS1233340-47-0
Cat. no.C3D-26189
Purity>95%
COA on file
1,3-Dimethyl-2-Nitrosobenzene (Mixture of Monomer and Dimer)
CAS19519-71-2
Cat. no.C3D-4653
Purity>95%
COA on file
2,2',2'',2'''-(((Nitrosoazanediyl)bis(ethane-2,1-diyl))bis(azanetriyl))tetraacetic Acid
CAS
Cat. no.C3D-262819
Purity>=95%
COA on file
2,2'-((2-((Carboxymethyl)(2-((carboxymethyl)(nitroso)amino)ethyl)amino)ethyl)azanediyl)diacetic Acid
CAS
Cat. no.C3D-262818
Purity>=95%
COA on file
2-((2,2-dimethoxyethyl)(nitroso)amino)-N-phenethylacetamide
CAS
Cat. no.C3D-26205
Purity>95%
COA on file
2-(7-Ethyl-1-nitroso-3a,4-dihydro-1H-indol-3-yl)-ethanol
CAS
Cat. no.C3D-26183
Purity>95%
COA on file
![2-Nitroso-2-azaspiro[4,5]decan-3-one chemical structure](/upload/struct/thumb_pc_C3D-26191.png)
![4-Hydroxy-alpha-[(methylnitrosoamino) methyl] benzenemethanol chemical structure](/upload/struct/thumb_pc_C3D-262122.png)
4-Hydroxy-alpha-[(methylnitrosoamino) methyl] benzenemethanol
CAS1822637-93-3
Cat. no.C3D-262122
Purity
COA on file
4-Methoxy-N-(1-methylethyl)-N-Nitrosobenzenamine
CAS502144-05-0
Cat. no.C3D-263358
Purity>95%
COA on file
![4-methyl-4-[methyl(nitroso)amino]pentan-2-one chemical structure](/upload/struct/thumb_pc_C3D-26147.png)
4-methyl-4-[methyl(nitroso)amino]pentan-2-one
CAS16339-21-2
Cat. no.C3D-26147
Purity>95%
COA on file
5,5-Dimethyl-1-nitrosoimidazolidine-2,4-dione
CAS37137-26-1
Cat. no.C3D-262116
Purity>95%
COA on file
![5-(4'-methyl-[1,1'-biphenyl]-2-yl)-2-nitroso-2H-tetrazole chemical structure](/upload/struct/thumb_pc_C3D-26202.png)
5-(4'-methyl-[1,1'-biphenyl]-2-yl)-2-nitroso-2H-tetrazole
CAS
Cat. no.C3D-26202
Purity>95%
COA on file
6-ethyl-3-(3-methoxy-4-(4-(4-nitrosopiperazin-1-yl)piperidin-1-yl)benzyl)-5-(morpholinomethyl)pyrazine-2-carboxamide
CAS
Cat. no.C3D-26206
Purity>95%
COA on file
6-imino-1,3-dimethyl-5-nitrosodihydropyrimidine-2,4(1H,3H)-dione
CAS43108-85-6
Cat. no.C3D-26199
Purity>95%
COA on file
![7-Chloro-1-nitroso-1,2,3,4-tetrahydro-5H-benzo[b]azepin-5-one chemical structure](/upload/struct/thumb_pc_C3D-262672.png)
7-Chloro-1-nitroso-1,2,3,4-tetrahydro-5H-benzo[b]azepin-5-one
CAS
Cat. no.C3D-262672
Purity95%
COA on file
7-chloro-1-nitroso-2,3,4,5-tetrahydro-1-benzazepin-5-ol
CAS
Cat. no.C3D-26196
Purity>95%
COA on file
7-Chloro-5-(2-fluorophenyl)-N-methyl-N-Nitroso-3H-1,4-benzodiazepin-2-amine
CAS59467-62-8
Cat. no.C1848827
Purity
COA on file
Disodium 1-Nitroso-2-naphthol-3,6-disulfonate Monohydrate
CAS525-05-3
Cat. no.C3D-2565
Purity
COA on file
ethyl N-methyl-N-Nitrosoglycinate (Mixture of Isomers)
CAS3344-50-8
Cat. no.C4X-1087112
Purity
COA on file
N-(4,5-Dichloro-2-Nitrophenyl)-N-Nitrosoacetamide
CAS15862-04-1
Cat. no.C3D-26122
Purity
COA on file
N-(6-chloro-3-pyridyl methyl) -N-ethyl-N-Nitroso-amine (Mixture of Isomers)
CAS
Cat. no.C4X-24935
Purity>95%
COA on file
N-Nitroso 1-( 4-Methoxy Benzyl) 1,2,3,4,5,6,7,8-octahydro Isoquinoline
CAS1801431-26-4
Cat. no.C3D-26201
Purity>95%
COA on file
N-Nitroso Carbamazepine EP Impurity E (N-Nitroso Clomipramine HCl EP Impurity E)
CAS7458-08-4
Cat. no.C1884558
Purity
COA on file
N-Nitroso Labetalol (Mixture of Diastereomers)
CAS2820170-74-7
Cat. no.C4X-246640
Purity
COA on file
N-Nitroso Phentolamine Mesylate EP Impurity C
CAS497930-24-2
Cat. no.C4X-224712
Purity>95%
COA on file
N-Nitroso Pseudoephedrine (N-Nitroso Ephedrine HCl EP Impurity B)
CAS1850-88-0
Cat. no.C4X-29761
Purity>95%
COA on file
N-Nitroso Rivastigmine Hydrogen Tartrate EP Impurity E
CAS3079775-26-8
Cat. no.C4X-138431
Purity
COA on file
![N-Nitroso-N-[(S)-1-Carbethoxy-1-butyl]-(S)-alanine chemical structure](/upload/struct/thumb_pc_C3D-262115.png)
N-Nitroso-N-ethyl Urea, Contains 40% water, 1.8 % AcOH
CAS759-73-9
Cat. no.C3D-4192
Purity
COA on file
N-Nitroso-N-methyl-4-aminobutyric Acid Methyl Ester
CAS51938-17-1
Cat. no.C1827694
Purity
COA on file
N-Nitrosoisopropylethyl Amine (Mixture of Isomers)
CAS16339-04-1
Cat. no.C3D-3042
Purity>95%
COA on file
N’-Nitro-N-Nitroso-N-methylguanidine (Stabilized with 40% Water)
CAS70-25-7
Cat. no.C4X-199810
Purity>95%
COA on file
rac N-Nitroso Thiazolidine-4-carboxylic Acid
CAS88381-44-6
Cat. no.CCHM704605
Purity>95%
COA on file
Sitagliptin Impurity 78 (Nitroso-STG-19) (NTTP)
CAS2892260-32-9
Cat. no.C4X-114478
Purity>95%
COA on file
Tris (N-Nitroso-N-Phenylhydroxyl-Amine)Aluminum Salt
CAS15305-07-4
Cat. no.C3D-26141
Purity>95%
COA on file
Bictegravir Related Compound C001/Dolutegravir Intermediate-1
CAS1335210-23-5
Cat. no.CP112465
Purity>95%
COA on file
Cefazolin USP Related Compound D(Diastereoisomer Mixture)
CAS1675245-01-8
Cat. no.C4X-157745
Purity>95%
COA on file
Dabigatran Etexilate USP Related Compound A
CAS1408238-40-3
Cat. no.C4X-10891
Purity>95%
COA on file
Deltamethrin Related Compound 2 (Bacisthemic Acid Chloride)
CAS55710-82-2
Cat. no.CS356667
Purity>95%
COA on file
Docusate Sodium USP Related Compound B Disodium Salt
CAS86878-53-7
Cat. no.C4X-20544
Purity>95%
COA on file
Fluticasone Propionate USP Related Compound J
CAS28416-82-2
Cat. no.C4X-165031
Purity>95%
COA on file
Mitomycin Related Compound 6 Trifluoroacetate (Mixture of Diastereomers)
CAS1192552-64-9
Cat. no.C4X-17016
Purity>=95%
COA on file
Pravastatin USP related compound A Sodium salt
CAS81093-43-8
Cat. no.C4X-17358
Purity>90%
COA on file
Propantheline Bromide Related Compound A(9-Hydroxy Propantheline Bromide)
CAS93446-02-7
Cat. no.C1787575
Purity>95%
COA on file
Tenofovir Disoproxil USP Related Compound A
CAS1432630-26-6
Cat. no.C4X-10761
Purity>95%
COA on file
Tenofovir Disoproxil USP Related Compound B
CAS1446486-33-4
Cat. no.C4X-10762
Purity>95%
COA on file
Tenofovir Disoproxil USP Related Compound G
CAS1422284-15-8
Cat. no.C4X-107611
Purity>95%
COA on file
Alprostadil (Prostaglandin E1) EP Impurity A
CAS14152-28-4
Cat. no.C4X-199626
Purity>95%
COA on file
Aripiprazole Impurity N22（Aripiprazole EP Impurity B）
CAS41202-77-1
Cat. no.CP136412
Purity>95%
COA on file
Benazepril EP Impurity E HCl (Benazepril USP Related Compound E HCl)
CAS88372-47-8
Cat. no.C4X-20965
Purity>95%
COA on file
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