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Pharmaceutical Impurity Reference Standards

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

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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%

Azithromycin EP Impurity K structure

Azithromycin EP Impurity K

CAS: 612534-95-9

In Stock>95%

Azithromycin EP Impurity L structure

Azithromycin EP Impurity L

CAS: 90503-06-3

In Stock>90%

Azithromycin EP Impurity N structure

Azithromycin EP Impurity N

CAS: 612069-25-7

In Stock>95%

Azithromycin EP Impurity M structure

Azithromycin EP Impurity M

CAS: 765927-71-7

In Stock>95%

Azithromycin EP Impurity J structure

Azithromycin EP Impurity J

CAS: 117693-41-1

In Stock>95%

Azithromycin CP Impurity Q structure

Azithromycin CP Impurity Q

CAS: 99290-97-8

In Stock>95%

Azithromycin EP Impurity G structure

Azithromycin EP Impurity G

CAS: 612069-31-5

In Stock>95%

Azithromycin CP Impurity R structure

Azithromycin CP Impurity R

CAS: 161193-44-8

In Stock>95%

Azithromycin EP Impurity A structure

Azithromycin EP Impurity A

CAS: 76801-85-9

In Stock>93%

Azithromycin EP Impurity B structure

Azithromycin EP Impurity B

CAS: 307974-61-4

In Stock>95%

Azithromycin EP Impurity O structure

Azithromycin EP Impurity O

CAS: 763924-54-5

In Stock>90%

Azithromycin impurity 22 structure

Azithromycin impurity 22

CAS: CATO-C4X-100322

In Stock97%+

Azithromycin Impurity 23 structure

Azithromycin Impurity 23

CAS: CATO-C4X-100323

In Stock97%+

Azithromycin EP Impurity D structure

Azithromycin EP Impurity D

CAS: 612069-26-8

In Stock>90%

Azithromycin Impurity 25 structure

Azithromycin Impurity 25

CAS: CATO-C4X-100325

In Stock97%+

Azithromycin Impurity 26 structure

Azithromycin Impurity 26

CAS: CATO-C4X-100326

In Stock97%+

Azithromycin Impurity 27 structure

Azithromycin Impurity 27

CAS: CATO-C4X-100327

In Stock97%+

Azithromycin Impurity 28 structure

Azithromycin Impurity 28

CAS: CATO-C4X-100328

In Stock97%+

Azithromycin Impurity 29 structure

Azithromycin Impurity 29

CAS: CATO-C4X-100329

In Stock97%+

Azithromycin EP Impurity F structure

Azithromycin EP Impurity F

CAS: 612069-28-0

In Stock>95%

Azithromycin Impurity 30 structure

Azithromycin Impurity 30

CAS: 2089577-97-7

In Stock97%+

Azithromycin Impurity 31 structure

Azithromycin Impurity 31

CAS: CATO-C4X-100331

In Stock97%+

Azithromycin Impurity 32 structure

Azithromycin Impurity 32

CAS: CATO-C4X-100332

In Stock97%+

Azithromycin Impurity 33 structure

Azithromycin Impurity 33

CAS: CATO-C4X-100333

In Stock97%+

Azithromycin Impurity 34 structure

Azithromycin Impurity 34

CAS: CATO-C4X-100334

In Stock97%+

Azithromycin Impurity 35 structure

Azithromycin Impurity 35

CAS: 117693-42-2

In Stock97%+

Azithromycin Impurity 36 structure

Azithromycin Impurity 36

CAS: 57794-18-0

In Stock97%+

Azithromycin Impurity 38 structure

Azithromycin Impurity 38

CAS: CATO-C4X-100338

In Stock97%+

Azithromycin Impurity 4 structure

Azithromycin Impurity 4

CAS: CATO-C4X-10034

In Stock97%+

Azithromycin Impurity 40 structure

Azithromycin Impurity 40

CAS: 76820-32-1

In Stock>95%

Azithromycin Impurity 44 structure

Azithromycin Impurity 44

CAS: 2365312-76-9

In Stock97%+

Azithromycin Impurity 45 structure

Azithromycin Impurity 45

CAS: 2365312-75-8

In Stock97%+

N-Nitroso Azithromycin Impurity 46 structure

N-Nitroso Azithromycin Impurity 46

CAS: CATO-C4X-100346

In Stock>90%

Azithromycin Impurity 47 structure

Azithromycin Impurity 47

CAS: CATO-C4X-100347

In Stock97%+

N-Nitroso Azithromycin Impurity 48 structure

N-Nitroso Azithromycin Impurity 48

CAS: CATO-C4X-100348

In Stock>90%

Azithromycin Impurity 49 structure

Azithromycin Impurity 49

CAS: CATO-C4X-100349

In Stock97%+

Azithromycin EP Impurity E structure

Azithromycin EP Impurity E

CAS: 612069-27-9

In Stock>90%

Azithromycin Impurity 50 structure

Azithromycin Impurity 50

CAS: CATO-C4X-100350

In Stock97%+

Azithromycin impurity 51 structure

Azithromycin impurity 51

CAS: 194809-66-0

In Stock>90%

Azithromycin Impurity P structure

Azithromycin Impurity P

CAS: CATO-C4X-100352

In Stock>90%

Azithromycin impurity 53 structure

Azithromycin impurity 53

CAS: 152727-04-3

In Stock97%+

N-Nitroso Azithromycin Impurity 54 structure

N-Nitroso Azithromycin Impurity 54

CAS: CATO-C4X-100354

In Stock97%+

Azithromycin impurity 55 structure

Azithromycin impurity 55

CAS: 944124-75-8

In Stock97%+

Azithromycin impurity 57 structure

Azithromycin impurity 57

CAS: CATO-C4X-100357

In Stock97%+

Azithromycin impurity 58 structure

Azithromycin impurity 58

CAS: CATO-C4X-100358

In Stock97%+

Azithromycin impurity 59 structure

Azithromycin impurity 59

CAS: 67342-52-3

In Stock97%+

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