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Pharmaceutical Impurity Reference Standards

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

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%+

Azithromycin EP Impurity C structure

Azithromycin EP Impurity C

CAS: 620169-47-3

In Stock>90%

Azithromycin impurity 60 structure

Azithromycin impurity 60

CAS: CATO-C4X-100360

In Stock97%+

Azithromycin impurity 61 structure

Azithromycin impurity 61

CAS: CATO-C4X-100361

In Stock97%+

Azithromycin impurity 62 structure

Azithromycin impurity 62

CAS: 857078-26-3

In Stock97%+

（See C4X-100319）Azithromycin EP Impurity A (See C4X-100319) structure

（See C4X-100319）Azithromycin EP Impurity A (See C4X-100319)

CAS: CATO-C4X-10037

In Stock97%+

Azithromycin EP Impurity H structure

Azithromycin EP Impurity H

CAS: 612069-30-4

In Stock>90%

Azithromycin EP Impurity I structure

Azithromycin EP Impurity I

CAS: 172617-84-4

In Stock>95%

Besifloxacin Impurity 1 structure

Besifloxacin Impurity 1

CAS: CATO-C4X-10041

In Stock97%+

Besifloxacin Impurity 2 structure

Besifloxacin Impurity 2

CAS: CATO-C4X-10042

In Stock97%+

Besifloxacin Impurity 3 structure

Besifloxacin Impurity 3

CAS: CATO-C4X-10043

In Stock97%+

Besifloxacin Impurity 4 structure

Besifloxacin Impurity 4

CAS: CATO-C4X-10044

In Stock97%+

Besifloxacin Impurity 5 structure

Besifloxacin Impurity 5

CAS: 124932-43-0

In Stock97%+

Tipiracil Impurity 1 structure

Tipiracil Impurity 1

CAS: CATO-C4X-10051

In Stock97%+

Tipiracil Impurity 10 HCl structure

Tipiracil Impurity 10 HCl

CAS: 2428584-36-3(free base)

In Stock>95%

Tipiracil Impurity 6 Chloride structure

Tipiracil Impurity 6 Chloride

CAS: CATO-C4X-100511

In Stock>95%

Tipiracil Impurity 12 structure

Tipiracil Impurity 12

CAS: 99478-59-8

In Stock97%+

Tipiracil Impurity 13 structure

Tipiracil Impurity 13

CAS: CATO-C4X-100513

In Stock97%+

Tipiracil Impurity 14 structure

Tipiracil Impurity 14

CAS: CATO-C4X-100514

In Stock97%+

Tipiracil Impurity 2 structure

Tipiracil Impurity 2

CAS: CATO-C4X-10052

In Stock97%+

Tipiracil Impurity 3 structure

Tipiracil Impurity 3

CAS: CATO-C4X-10053

In Stock97%+

Tipiracil Impurity 4 structure

Tipiracil Impurity 4

CAS: CATO-C4X-10054

In Stock97%+

Tipiracil Impurity 5 structure

Tipiracil Impurity 5

CAS: CATO-C4X-10055

In Stock97%+

Tipiracil Impurity 6 structure

Tipiracil Impurity 6

CAS: 7544-75-4

In Stock97%+

Tipiracil Impurity 7 structure

Tipiracil Impurity 7

CAS: 6674-22-2

In Stock>90%

Tipiracil Impurity 8 structure

Tipiracil Impurity 8

CAS: 18592-13-7

In Stock97%+

Tipiracil Impurity 9 structure

Tipiracil Impurity 9

CAS: 73742-45-7

In Stock97%+

Afatinib Impurity 1 structure

Afatinib Impurity 1

CAS: 314771-88-5

In Stock>95%

Afatinib Impurity 10 structure

Afatinib Impurity 10

CAS: CATO-C4X-100610

In Stock97%+

Afatinib Impurity 11 structure

Afatinib Impurity 11

CAS: CATO-C4X-100611

In Stock97%+

Afatinib impurity 12 structure

Afatinib impurity 12

CAS: 1680184-59-1

In Stock>95%

Afatinib Impurity 13 structure

Afatinib Impurity 13

CAS: CATO-C4X-100613

In Stock97%+

Afatinib Impurity 14 structure

Afatinib Impurity 14

CAS: 2121530-37-6

In Stock97%+

Afatinib Impurity 16 structure

Afatinib Impurity 16

CAS: CATO-C4X-100616

In Stock97%+

Afatinib Impurity 17 structure

Afatinib Impurity 17

CAS: CATO-C4X-100617

In Stock97%+

Afatinib Impurity 18 structure

Afatinib Impurity 18

CAS: CATO-C4X-100618

In Stock>95%

Afatinib Impurity 19 structure

Afatinib Impurity 19

CAS: 2223677-58-3

In Stock>95%

Afatinib Impurity 2 structure

Afatinib Impurity 2

CAS: 314771-76-1

In Stock>95%

Afatinib Impurity 20 structure

Afatinib Impurity 20

CAS: 179552-73-9

In Stock>95%

Afatinib Impurity 21 structure

Afatinib Impurity 21

CAS: 402855-03-2

In Stock>95%

Afatinib Impurity 22 structure

Afatinib Impurity 22

CAS: 162012-67-1

In Stock>95%

Afatinib Impurity 23 structure

Afatinib Impurity 23

CAS: CATO-C4X-100623

In Stock97%+

Afatinib Impurity 24 structure

Afatinib Impurity 24

CAS: CATO-C4X-100624

In Stock97%+

Afatinib Impurity 25 structure

Afatinib Impurity 25

CAS: CATO-C4X-100625

In Stock97%+

Afatinib Impurity 26 structure

Afatinib Impurity 26

CAS: CATO-C4X-100626

In Stock97%+

Afatinib Impurity 27 structure

Afatinib Impurity 27

CAS: CATO-C4X-100627

In Stock97%+

Afatinib Impurity 29 structure

Afatinib Impurity 29

CAS: 1456696-14-2

In Stock90%

Afatinib Impurity 3 structure

Afatinib Impurity 3

CAS: 945553-91-3

In Stock>95%

Afatinib Impurity 30 structure

Afatinib Impurity 30

CAS: CATO-C4X-100630

In Stock97%+

Afatinib Impurity 31 structure

Afatinib Impurity 31

CAS: CATO-C4X-100631

In Stock97%+

Afatinib Impurity 32 structure

Afatinib Impurity 32

CAS: 2170273-17-1

In Stock97%+

Afatinib Impurity 33 structure

Afatinib Impurity 33

CAS: CATO-C4X-100633

In Stock>95%

Afatinib Impurity 34 structure

Afatinib Impurity 34

CAS: CATO-C4X-100634

In Stock>95%

Afatinib Impurity 35 structure

Afatinib Impurity 35

CAS: 848133-35-7

In Stock>95%

Afatinib Impurity 36 structure

Afatinib Impurity 36

CAS: CATO-C4X-100636

In Stock>95%

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