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Pharmaceutical Impurity Reference Standards

Process impurities, degradation products and genotoxic impurity reference standards with full characterization.

59,706 products available — showing first 8,000

Aprepitant impurity 50 structure

Aprepitant impurity 50

CAS: 349-59-7

In Stock97%+

Varenicline Dioxo Impurity structure

Varenicline Dioxo Impurity

CAS: 357424-07-8

In Stock97%+

Varenicline Impurity  C61 structure

Varenicline Impurity  C61

CAS: 357424-12-5

In Stock97%+

Dinoprost EP Impurity B structure

Dinoprost EP Impurity B

CAS: 37658-84-7

In Stock97%+

Edoxaban impurity 101 structure

Edoxaban impurity 101

CAS: 39620-04-7

In Stock>95%

Terfenadine EP Impurity A structure

Terfenadine EP Impurity A

CAS: 43076-30-8

In Stock97%+

Ubidecarenone Impurity 14 (Coenzyme Q4) structure

Ubidecarenone Impurity 14 (Coenzyme Q4)

CAS: 4370-62-1

In Stock97%+

Clebopride EP Impurity B structure

Clebopride EP Impurity B

CAS: 50541-93-0

In Stock97%+

Roxadustat Impurity N7 structure

Roxadustat Impurity N7

CAS: 51-80-9

In Stock97%+

Tinidazole Impurity N1 structure

Tinidazole Impurity N1

CAS: 52455-84-2

In Stock97%+

57526-81-5 M4G34404CX Prenalterol Prenalterol [INN:BAN] Phenol, 4-(2-hydroxy-3-((1-methylethyl)amino)propoxy)-, (S)- H 133/22 BRN 5740338 CGP 7760B EINECS 260-791-5 (S)-4-(2-Hydroxy-3-((1-methylethyl)amino)propoxy)phenol Prenalterolum [INN-Latin] Prenalterolum UNII-M4G34404CX structure

57526-81-5 M4G34404CX Prenalterol Prenalterol [INN:BAN] Phenol, 4-(2-hydroxy-3-((1-methylethyl)amino)propoxy)-, (S)- H 133/22 BRN 5740338 CGP 7760B EINECS 260-791-5 (S)-4-(2-Hydroxy-3-((1-methylethyl)amino)propoxy)phenol Prenalterolum [INN-Latin] Prenalterolum UNII-M4G34404CX

CAS: 57526-81-5

In Stock97%+

Lusutrombopag Impurity N6 structure

Lusutrombopag Impurity N6

CAS: 67442-07-3

In Stock97%+

Milnacipran impurity 01 structure

Milnacipran impurity 01

CAS: 69160-65-2

In Stock97%+

Bromfenac Impurity N17 structure

Bromfenac Impurity N17

CAS: 70803-94-0

In Stock97%+

Prothioconazole impurity N1 structure

Prothioconazole impurity N1

CAS: 708263-86-9

In Stock97%+

Fluocinolone Acetonide Impurity N3 structure

Fluocinolone Acetonide Impurity N3

CAS: 72498-89-6

In Stock97%+

Cefixime Impurity C68 structure

Cefixime Impurity C68

CAS: 74440-05-4

In Stock97%+

Isoproturon Impurity 1 structure

Isoproturon Impurity 1

CAS: 797790-90-0

In Stock>95%

Progesterone Impurity N47 structure

Progesterone Impurity N47

CAS: 82182-55-6

In Stock97%+

Rosuvastatin Impurity N1 structure

Rosuvastatin Impurity N1

CAS: 849470-61-7

In Stock97%+

Urapidil Impurity N16 structure

Urapidil Impurity N16

CAS: 874-14-6

In Stock97%+

Ertapenem Impurity C90 structure

Ertapenem Impurity C90

CAS: 87691-27-8

In Stock97%+

Ticlopidine EP Impurity C structure

Ticlopidine EP Impurity C

CAS: 89-97-4

In Stock97%+

Telmisartan Impurity N4 structure

Telmisartan Impurity N4

CAS: 89323-10-4

In Stock97%+

Pentazocine Impurity N1 structure

Pentazocine Impurity N1

CAS: 90278-52-7

In Stock97%+

914777-33-6 Oxazolidinone Dimer Impurity structure

914777-33-6 Oxazolidinone Dimer Impurity

CAS: 914777-33-6

In Stock97%+

Noscapine impurity N1 structure

Noscapine impurity N1

CAS: 92621-03-9

In Stock97%+

Gadodiamide EP Impurity B Disodium Salt structure

Gadodiamide EP Impurity B Disodium Salt

CAS: 92923-64-3

In Stock97%+

Piribedil Impurity N3 structure

Piribedil Impurity N3

CAS: 931-63-5

In Stock97%+

Baricitinib Impurity N2 structure

Baricitinib Impurity N2

CAS: 941685-27-4

In Stock97%+

Meropenem Impurity C82 structure

Meropenem Impurity C82

CAS: 96034-57-0

In Stock97%+

Nateglinide EP Impurity B structure

Nateglinide EP Impurity B

CAS: 105816-05-5

In Stock97%+

Ranitidine EP Impurity D structure

Ranitidine EP Impurity D

CAS: 117846-02-3

In Stock97%+

rac-Atomoxetine EP Impurity C structure

rac-Atomoxetine EP Impurity C

CAS: 56161-78-5

In Stock97%+

Ilaprazole Impurity N2 structure

Ilaprazole Impurity N2

CAS: 1018229-57-6

In Stock97%+

Eltrombopag Impurity N23 structure

Eltrombopag Impurity N23

CAS: 2500321-37-7

In Stock>95%

Belumosudil Impurity N7 structure

Belumosudil Impurity N7

CAS: 911419-33-5

In Stock97%+

Bempedoic Acid impurity N20 structure

Bempedoic Acid impurity N20

CAS: 7443-29-0

In Stock97%+

Piribedil Impurity N5 structure

Piribedil Impurity N5

CAS: 1022849-90-6

In Stock97%+

Baloxavir Impurity C19 structure

Baloxavir Impurity C19

CAS: 1985606-48-1

In Stock97%+

Deoxycholic acid C16 structure

Deoxycholic acid C16

CAS: 1311972-97-0

In Stock97%+

Buspirone EP Impurity I Oxalate structure

Buspirone EP Impurity I Oxalate

CAS: 2725354-99-2

In Stock97%+

Methotrexate impurity N3 structure

Methotrexate impurity N3

CAS: 65148-64-3

In Stock97%+

Empagliflozin impurity 02 structure

Empagliflozin impurity 02

CAS: 1620758-31-7&1620758-32-8

In Stock97%+

Finasteride Impurity N44 structure

Finasteride Impurity N44

CAS: 140700-61-4

In Stock97%+

Finasteride Impurity 3-one-4-aza-5-androstene-17β-carboxylate methyl ester structure

Finasteride Impurity 3-one-4-aza-5-androstene-17β-carboxylate methyl ester

CAS: 104214-18-8

In Stock>95%

Flunarizine EP Impurity C structure

Flunarizine EP Impurity C

CAS: 90830-31-2

In Stock97%+

Aprepitant impurity 02 structure

Aprepitant impurity 02

CAS: 1523569-90-5

In Stock97%+

1,3-Dioxepane-5,6-diol, 2,2-dimethyl- structure

1,3-Dioxepane-5,6-diol, 2,2-dimethyl-

CAS: 1629961-94-9

In Stock>95%

Gadobutrol Impurity N54 structure

Gadobutrol Impurity N54

CAS: 909195-13-7

In Stock97%+

Cariprazine Impurity N2 structure

Cariprazine Impurity N2

CAS: 1231947-90-2

In Stock97%+

Carfilzomib Impurity N1 structure

Carfilzomib Impurity N1

CAS: 1890999-52-6

In Stock97%+

Lenvatinib Impurity N12 structure

Lenvatinib Impurity N12

CAS: 2143930-75-8

In Stock97%+

Lenvatinib Impurity N4 structure

Lenvatinib Impurity N4

CAS: 2110414-05-4

In Stock97%+

Linezolid Impurity C78 structure

Linezolid Impurity C78

CAS: 952680-48-7

In Stock97%+

Risperidone EP Impurity A and B(Mixture of E and Z Isomers) structure

Risperidone EP Impurity A and B(Mixture of E and Z Isomers)

CAS: 158697-66-6

In Stock97%+

Rizatriptan impurity 19 Benzoic acid structure

Rizatriptan impurity 19 Benzoic acid

CAS: 1391062-44-4 (free base)

In Stock97%+

Miglitol impurity N2 structure

Miglitol impurity N2

CAS: 2230722-74-2

In Stock97%+

Nafamostat Impurity N3 structure

Nafamostat Impurity N3

CAS: 115325-88-7

In Stock95%

Drotaverin Impurity N1 structure

Drotaverin Impurity N1

CAS: 56046-20-9

In Stock97%+

Trametinib Impurity N9 structure

Trametinib Impurity N9

CAS: 871700-41-3

In Stock97%+

Trametinib Impurity N10 structure

Trametinib Impurity N10

CAS: 1383430-04-3

In Stock97%+

Trametinib Impurity N11 structure

Trametinib Impurity N11

CAS: 871701-23-4

In Stock97%+

Trazodone Impurity QZT-IM-2-Z4 HCl structure

Trazodone Impurity QZT-IM-2-Z4 HCl

CAS: 2247108-04-7

In Stock>95%

Trazodone Impurity N13 structure

Trazodone Impurity N13

CAS: 101364-27-6

In Stock97%+

Tofacitinib Impurity N49 structure

Tofacitinib Impurity N49

CAS: 2280085-84-7

In Stock97%+

Tolterodine Impurity N3 HCl structure

Tolterodine Impurity N3 HCl

CAS: 124936-83-0

In Stock97%+

Pyridoxine /Vitamin B6 Impurity C35 structure

Pyridoxine /Vitamin B6 Impurity C35

CAS: 1805775-66-9

In Stock97%+

Menaquinone impurity 02 structure

Menaquinone impurity 02

CAS: 65941-19-7

In Stock97%+

Udenafil Impurity N1 structure

Udenafil Impurity N1

CAS: 1810029-01-6

In Stock97%+

Udenafil Impurity N45 structure

Udenafil Impurity N45

CAS: 936951-20-1

In Stock97%+

Sitagliptin Impurity 53 HCl structure

Sitagliptin Impurity 53 HCl

CAS: 849832-76-4(free base)

In Stock>95%

Indobufen Impurity N2 structure

Indobufen Impurity N2

CAS: 36691-07-3

In Stock97%+

Etomidate impurity 01 structure

Etomidate impurity 01

CAS: 66512-38-7

In Stock97%+

Levofloxacin impurity 01 structure

Levofloxacin impurity 01

CAS: 154228-18-9

In Stock97%+

Dicyclomine impurity N1 structure

Dicyclomine impurity N1

CAS: 109158-77-2

In Stock97%+

Dronedarone EP Impurity C structure

Dronedarone EP Impurity C

CAS: 141626-57-5

In Stock97%+

Droperidol EP Impurity B structure

Droperidol EP Impurity B

CAS: 1026015-45-1

In Stock97%+

Prednisone Impurity N56 structure

Prednisone Impurity N56

CAS: 103466-44-0

In Stock97%+

Leuprorelin Impurity N8 structure

Leuprorelin Impurity N8

CAS: 112642-11-2（free base）

In Stock97%+

Rabeprazole Impurity N1 structure

Rabeprazole Impurity N1

CAS: 1163685-30-0

In Stock97%+

Oseltamivir Impurity C62 structure

Oseltamivir Impurity C62

CAS: 1217834-81-5

In Stock97%+

Selexipag Impurity 2 D6 structure

Selexipag Impurity 2 D6

CAS: 1265295-56-4

In Stock>95%

Cinacalcet Impurity N57 structure

Cinacalcet Impurity N57

CAS: 1271930-15-4

In Stock97%+

Chlorhexidine EP Impurity A structure

Chlorhexidine EP Impurity A

CAS: 152504-08-0

In Stock97%+

Thiocolchicoside EP Impurity G structure

Thiocolchicoside EP Impurity G

CAS: 177991-81-0

In Stock97%+

N-Nitroso Cetirizine EP Impurity A structure

N-Nitroso Cetirizine EP Impurity A

CAS: 2005-04-1

In Stock97%+

Benzydamine EP Impurity B HCl structure

Benzydamine EP Impurity B HCl

CAS: 2196183-71-6

In Stock97%+

Sildenafil Impurity C31 structure

Sildenafil Impurity C31

CAS: 2196244-90-1

In Stock97%+

Sacubitril Impurity N38 structure

Sacubitril Impurity N38

CAS: 2216746-87-9

In Stock97%+

Aripiprazole Impurity N2 structure

Aripiprazole Impurity N2

CAS: 2220149-92-6

In Stock>95%

Baloxavir Impurity C65 structure

Baloxavir Impurity C65

CAS: 2374735-31-4

In Stock97%+

Dapagliflozin Impurity N9 structure

Dapagliflozin Impurity N9

CAS: 2452300-81-9

In Stock97%+

Dexamethasone Impurity 715 Disodium Salt structure

Dexamethasone Impurity 715 Disodium Salt

CAS: 39005-10-2

In Stock>95%

Vardenafil Impurity N2 structure

Vardenafil Impurity N2

CAS: 448184-54-1

In Stock97%+

Vardenafil Impurity N1 structure

Vardenafil Impurity N1

CAS: 448184-56-3

In Stock97%+

Efavirenz Related Compound A structure

Efavirenz Related Compound A

CAS: 209414-27-7

In Stock97%+

Budesonide Impurity N60 structure

Budesonide Impurity N60

CAS: 910299-74-0

In Stock>95%

Vonoprazan Impurity C295 structure

Vonoprazan Impurity C295

CAS: 928325-68-2

In Stock97%+

Lumefantrine Impurity N1 structure

Lumefantrine Impurity N1

CAS: 2170653-95-7 (free base)

In Stock97%+

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