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Pharmaceutical Impurity Reference Standards

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

Difenoconazole Impurity 3 structure

Difenoconazole Impurity 3

CAS: CATO-C3D-263029

In Stock97%+

Methyl (R)-4-Nitro-3-((oxiran-2-ylmethyl)amino)benzoate structure

Methyl (R)-4-Nitro-3-((oxiran-2-ylmethyl)amino)benzoate

CAS: CATO-C3D-263045

In Stock≥95%

Difelikefalin Preparation and Separation of Impurity 91 structure

Difelikefalin Preparation and Separation of Impurity 91

CAS: CATO-C3D-263091

In Stock97%+

Drometrizole Trisiloxane USP Related Compound D structure

Drometrizole Trisiloxane USP Related Compound D

CAS: 2514602-12-9

In Stock97%+

Polydatin Impurity 1 structure

Polydatin Impurity 1

CAS: 3009113-18-9

In Stock>95%

168项目定制杂质1 structure

168项目定制杂质1

CAS: CATO-C3D-263214

In Stock97%+

Others Impurity 263231 structure

Others Impurity 263231

CAS: CATO-C3D-263231

In Stock97%+

DA-302168S Impurity 1 structure

DA-302168S Impurity 1

CAS: CATO-C3D-263268

In Stock97%+

DA-302168S Impurity 2 structure

DA-302168S Impurity 2

CAS: CATO-C3D-263269

In Stock97%+

DA-302168S Impurity 3 structure

DA-302168S Impurity 3

CAS: CATO-C3D-263270

In Stock97%+

Pyrilutamide Impurity N88盐酸盐 structure

Pyrilutamide Impurity N88盐酸盐

CAS: 1542258-18-3 (free base)

In Stock≥95%

N-Acetyltyrosine EP Impurity B structure

N-Acetyltyrosine EP Impurity B

CAS: 17355-23-6

In Stock>95%

Oxytetracycline EP Impurity D structure

Oxytetracycline EP Impurity D

CAS: 18695-01-7

In Stock>90%

Spectinomycin EP Impurity A Dihydrochloride structure

Spectinomycin EP Impurity A Dihydrochloride

CAS: 52049-70-4

In Stock97%+

N-Nitroso Chlorcyclizine EP Impurity A structure

N-Nitroso Chlorcyclizine EP Impurity A

CAS: 16339-07-4

In Stock>90%

N-Nitroso Cyclophosphamide EP Impurity C structure

N-Nitroso Cyclophosphamide EP Impurity C

CAS: 67856-68-2

In Stock97%+

N-Nitroso Cyclizine EP Impurity A-d4 structure

N-Nitroso Cyclizine EP Impurity A-d4

CAS: 756524-88-6

In Stock>95%

Bacampicillin EP Impurity F structure

Bacampicillin EP Impurity F

CAS: 52-66-4

In Stock97%+

N-Nitroso Tropicamide EP Impurity A structure

N-Nitroso Tropicamide EP Impurity A

CAS: 13256-23-0

In Stock>95%

methyl 2,4,6-trimethoxybenzenesulfonate structure

methyl 2,4,6-trimethoxybenzenesulfonate

CAS: CATO-C3D-4662

In Stock>95%

Fludeoxyglucose(18F)EP Impurity D structure

Fludeoxyglucose(18F)EP Impurity D

CAS: 80965-30-6

In Stock97%+

Inosine Unknow impurity 4 structure

Inosine Unknow impurity 4

CAS: 2627-69-2

In Stock>95%

α-Ketoglutaric acid Dimer Impurity structure

α-Ketoglutaric acid Dimer Impurity

CAS: CATO-C3D-5782

In Stock>90%

N-Nitroso Tamsulosin Impurity (Mixture of Isomers) structure

N-Nitroso Tamsulosin Impurity (Mixture of Isomers)

CAS: CATO-C3D-5990

In Stock>90%

Sulindac EP Impurity D structure

Sulindac EP Impurity D

CAS: 134439-52-4

In Stock>95%

Cladribine EP Impurity A structure

Cladribine EP Impurity A

CAS: 4546-70-7

In Stock>95%

DTPA Impurity 1 structure

DTPA Impurity 1

CAS: 27825-74-7

In Stock97%+

Erythromycin EP Impurity B structure

Erythromycin EP Impurity B

CAS: 992-62-1

In Stock>90%

Erythromycin Impurity 10(Davercin) structure

Erythromycin Impurity 10(Davercin)

CAS: 55224-05-0

In Stock>85%

Erythromycin Impurity 12 structure

Erythromycin Impurity 12

CAS: CATO-C4X-100112

In Stock97%+

Erythromycin Impurity 13 structure

Erythromycin Impurity 13

CAS: 58781-38-7

In Stock>90%

Erythromycin EP Impurity H（Erythromycin A N-oxide） structure

Erythromycin EP Impurity H（Erythromycin A N-oxide）

CAS: 992-65-4

In Stock>90%

Erythromycin EP Impurity I（Erythralosamine） structure

Erythromycin EP Impurity I（Erythralosamine）

CAS: 546-57-6

In Stock>90%

Erythromycin EP Impurity E structure

Erythromycin EP Impurity E

CAS: 33396-29-1

In Stock>95%

Erythromycin EP Impurity J structure

Erythromycin EP Impurity J

CAS: 105900-46-7

In Stock>90%

Erythromycin Impurity 23 structure

Erythromycin Impurity 23

CAS: 226086-79-9

In Stock>90%

Erythromycin Impurity 26 structure

Erythromycin Impurity 26

CAS: 13483-18-6

In Stock>80%

Erythromycin EP Impurity D structure

Erythromycin EP Impurity D

CAS: 23893-13-2

In Stock>90%

Erythromycin Impurity 33 structure

Erythromycin Impurity 33

CAS: CATO-C4X-100133

In Stock97%+

Erythromycin EP Impurity L structure

Erythromycin EP Impurity L

CAS: 127955-44-6

In Stock>93%

Erythromycin Impurity 38 structure

Erythromycin Impurity 38

CAS: CATO-C4X-100138

In Stock97%+

Erythromycin Impurity 39 structure

Erythromycin Impurity 39

CAS: CATO-C4X-100139

In Stock97%+

Erythromycin Impurity 40 structure

Erythromycin Impurity 40

CAS: CATO-C4X-100140

In Stock>95%

Erythromycin Impurity 41 structure

Erythromycin Impurity 41

CAS: 33275-72-8

In Stock>95%

Erythromycin EP Impurity N structure

Erythromycin EP Impurity N

CAS: 3225-82-9

In Stock>90%

Erythromycin EP Impurity K structure

Erythromycin EP Impurity K

CAS: 33442-56-7

In Stock>90%

Erythromycin EP Impurity M structure

Erythromycin EP Impurity M

CAS: 616234-56-1

In Stock>90%

Erythromycin Impurity 45 structure

Erythromycin Impurity 45

CAS: 1094780-33-2

In Stock97%+

Erythromycin Impurity 46 structure

Erythromycin Impurity 46

CAS: CATO-C4X-100146

In Stock97%+

Erythromycin 4’- structure

Erythromycin 4’-

CAS: 200802-92-2

In Stock97%+

Erythromycin Impurity 49 structure

Erythromycin Impurity 49

CAS: 229318-98-3

In Stock97%+

Erythromycin EP Impurity F structure

Erythromycin EP Impurity F

CAS: 105882-69-7

In Stock>95%

Erythromycin Impurity 50 structure

Erythromycin Impurity 50

CAS: 37152-22-0

In Stock97%+

N-Nitroso Erythromycin EP Impurity B structure

N-Nitroso Erythromycin EP Impurity B

CAS: CATO-C4X-100151

In Stock>95%

Erythromycin ethylsuccinate Impurity 52 structure

Erythromycin ethylsuccinate Impurity 52

CAS: CATO-C4X-100152

In Stock>90%

Erythromycin Impurity 53 structure

Erythromycin Impurity 53

CAS: CATO-C4X-100153

In Stock≥90%

Erythromycin impurity 56 structure

Erythromycin impurity 56

CAS: CATO-C4X-100156

In Stock97%+

N-Nitroso Erythromycin impurity 57 structure

N-Nitroso Erythromycin impurity 57

CAS: CATO-C4X-100157

In Stock97%+

Erythromycin impurity 58 structure

Erythromycin impurity 58

CAS: 145259-56-9

In Stock97%+

Erythromycin EP Impurity C structure

Erythromycin EP Impurity C

CAS: 41451-91-6

In Stock>90%

Erythromycin impurity 63 structure

Erythromycin impurity 63

CAS: CATO-C4X-100163

In Stock97%+

Erythromycin Sulfonamide Impurity B Oxime Derivative structure

Erythromycin Sulfonamide Impurity B Oxime Derivative

CAS: 231620-64-7

In Stock97%+

Erythromycin Thiosulfinate Impurity A Oxime Derivative structure

Erythromycin Thiosulfinate Impurity A Oxime Derivative

CAS: CATO-C4X-100165

In Stock97%+

Erythromycin thiocyanate impurity B reduced derivative structure

Erythromycin thiocyanate impurity B reduced derivative

CAS: CATO-C4X-100166

In Stock97%+

Erythromycin thiocyanate impurity C reduced derivative structure

Erythromycin thiocyanate impurity C reduced derivative

CAS: CATO-C4X-100167

In Stock97%+

Erythromycin thiocyanate impurity A reduced derivative structure

Erythromycin thiocyanate impurity A reduced derivative

CAS: CATO-C4X-100168

In Stock97%+

Erythromycin EP Impurity A structure

Erythromycin EP Impurity A

CAS: 82230-93-1

In Stock>90%

Erythromycin Impurity 72 structure

Erythromycin Impurity 72

CAS: CATO-C4X-100172

In Stock97%+

Erythromycin thiocyanate impurity A rearranged derivative structure

Erythromycin thiocyanate impurity A rearranged derivative

CAS: CATO-C4X-100173

In Stock97%+

Erythromycin thiocyanate impurity B rearranged derivative structure

Erythromycin thiocyanate impurity B rearranged derivative

CAS: CATO-C4X-100174

In Stock97%+

Erythromycin impurity 75 structure

Erythromycin impurity 75

CAS: 15797-36-1

In Stock97%+

Erythromycin impurity 76 structure

Erythromycin impurity 76

CAS: 34698-88-9

In Stock97%+

Clarithromycin EP Impurity I structure

Clarithromycin EP Impurity I

CAS: 118058-74-5

In Stock>95%

Clarithromycin EP Impurity E structure

Clarithromycin EP Impurity E

CAS: 81103-14-2

In Stock>95%

Clarithromycin EP Impurity F structure

Clarithromycin EP Impurity F

CAS: 128940-83-0

In Stock>90%

Clarithromycin EP Impurity H structure

Clarithromycin EP Impurity H

CAS: 127140-69-6

In Stock>90%

Clarithromycin EP Impurity A structure

Clarithromycin EP Impurity A

CAS: 124412-58-4

In Stock>95%

Clarithromycin impurity 14 structure

Clarithromycin impurity 14

CAS: 138109-92-9

In Stock>90%

Clarithromycin EP Impurity P structure

Clarithromycin EP Impurity P

CAS: 123967-58-8

In Stock>95%

Clarithromycin impurity 16(See C4X-100217) structure

Clarithromycin impurity 16(See C4X-100217)

CAS: CATO-C4X-100216

In Stock97%+

Clarithromycin EP Impurity K structure

Clarithromycin EP Impurity K

CAS: 127157-35-1

In Stock>95%

Clarithromycin EP Impurity B structure

Clarithromycin EP Impurity B

CAS: 299409-85-1

In Stock>90%

Clarithromycin Impurity 19 structure

Clarithromycin Impurity 19

CAS: CATO-C4X-100219

In Stock97%+

Clarithromycin EP Impurity J(Roxithromycin EP Impurity C) structure

Clarithromycin EP Impurity J(Roxithromycin EP Impurity C)

CAS: 111321-02-9

In Stock>90%

Clarithromycin Impurity 20 structure

Clarithromycin Impurity 20

CAS: 118074-07-0

In Stock>95%

Clarithromycin Impurity 21 structure

Clarithromycin Impurity 21

CAS: CATO-C4X-100221

In Stock97%+

Clarithromycin Impurity 22 structure

Clarithromycin Impurity 22

CAS: CATO-C4X-100222

In Stock>95%

Clarithromycin Impurity 23 structure

Clarithromycin Impurity 23

CAS: 470-12-2

In Stock>95%

Clarithromycin Impurity 28 structure

Clarithromycin Impurity 28

CAS: CATO-C4X-100228

In Stock97%+

Clarithromycin EP Impurity J(Roxithromycin EP Impurity C) HCl structure

Clarithromycin EP Impurity J(Roxithromycin EP Impurity C) HCl

CAS: 145645-54-1

In Stock97%+

Clarithromycin EP Impurity C structure

Clarithromycin EP Impurity C

CAS: 127253-06-9

In Stock>90%

Clarithromycin EP Impurity K HCl structure

Clarithromycin EP Impurity K HCl

CAS: 127157-35-1（free base）

In Stock97%+

Clarithromycin Impurity 35 structure

Clarithromycin Impurity 35

CAS: CATO-C4X-100235

In Stock97%+

Clarithromycin EP Impurity L structure

Clarithromycin EP Impurity L

CAS: 127253-05-8

In Stock>90%

Clarithromycin EP Impurity M structure

Clarithromycin EP Impurity M

CAS: 127182-43-8

In Stock>95%

Clarithromycin EP Impurity D structure

Clarithromycin EP Impurity D

CAS: 101666-68-6

In Stock>95%

Clarithromycin EP Impurity O structure

Clarithromycin EP Impurity O

CAS: 127252-80-6

In Stock>90%

Clarithromycin EP Impurity G structure

Clarithromycin EP Impurity G

CAS: 127182-44-9

In Stock>90%

Clarithromycin EP Impurity N structure

Clarithromycin EP Impurity N

CAS: 144604-03-5

In Stock>95%

Azithromycin EP Impurity Q structure

Azithromycin EP Impurity Q

CAS: 2095879-65-3

In Stock>95%

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