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Impurities

SynThink is a trusted producer and supplier of Pharmaceutical Reference Standards, including Impurity Standards. These materials are essential for pharmaceutical companies conducting research into the quality, stability, and biological safety of drug products. We maintain a robust inventory of API impurities, ready to support your development and regulatory needs.

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Impurities, Pitavastatin

Pitavastatin (3R,5R) Ethyl Ester

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CAS No.

: 380848-32-8

Mol F.

: C27H28FNO4

Mol W.

: 449.51

Cat No.

: SA29507

Impurities, Pitavastatin

Pitavastatin (3S,5R) Ethyl Ester

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CAS No.

: NA

Mol F.

: C27H28FNO4

Mol W.

: 449.51

Cat No.

: SA29508

Impurities, Pitavastatin

Pitavastatin (3S,5S) Ethyl Ester

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CAS No.

: 380848-30-6

Mol F.

: C27H28FNO4

Mol W.

: 449.51

Cat No.

: SA29509

Impurities, Pitavastatin

Pitavastatin 3-Oxo Ethyl Ester

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CAS No.

: 148901-69-3

Mol F.

: C₂₇H₂₆FNO₄

Mol W.

: 447.5

Cat No.

: SA29517

Impurities, Pitavastatin

Pitavastatin 5-Oxo Ethyl Ester

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CAS No.

: NA

Mol F.

: C27H26FNO4

Mol W.

: 447.5

Cat No.

: SA29520

Impurities, Pitavastatin

Pitavastatin 5-Oxo Ethyl Ester

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CAS No.

: 444732-68-7

Mol F.

: C27H26FNO4

Mol W.

: 447.5

Cat No.

: SA29518

Impurities, Pitavastatin

Pitavastatin Acetonide t-Butyl Ester

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CAS No.

: 147489-06-3

Mol F.

: C32H36FNO4

Mol W.

: 517.63

Cat No.

: SA29524

Impurities, Pitavastatin

Pitavastatin Calcium

$80.00 25 mg

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CAS No.

: 147511-69-1 (Base); 147526-32-7 (Ca salt)

Mol F.

: (C25H23FNO4)2.Ca (Calcium Salt); C25H23FNO4

Mol W.

: 880.98 (Ca); 421.45 (Acid)

Cat No.

: SA29504

Impurities, Pitavastatin

Pitavastatin Desfluoro Acetonide t-Butyl Ester

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CAS No.

: NA

Mol F.

: C32H37NO4

Mol W.

: 499.64

Cat No.

: SA29511

Impurities, Pitavastatin

Pitavastatin Desfluoro t-Butyl Ester

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CAS No.

: NA

Mol F.

: C29H33NO4

Mol W.

: 459.58

Cat No.

: SA29510

Impurities, Pitavastatin

Pitavastatin Ethyl Ester

$195.00 25 mg

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CAS No.

: 167073-19-0

Mol F.

: C27H28FNO4

Mol W.

: 449.51

Cat No.

: SA29513

Impurities, Pitavastatin

Pitavastatin Hydroxymethyl

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CAS No.

: 121660-11-5

Mol F.

: C₁₉H₁₆FNO

Mol W.

: 293.33

Cat No.

: SA29516

Impurities, Pitavastatin

Pitavastatin Methylbenzylamine | CAS : 147511-70-4

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CAS No.

: 147511-70-4

Mol F.

: C33H35FN2O4

Mol W.

: 542.64

Cat No.

: SA29528

Impurities, Pitavastatin

Pitavastatin N-Oxide | CAS : 1611499-16-1

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CAS No.

: 1611499-16-1

Mol F.

: C25H24FNO5

Mol W.

: 437.46

Cat No.

: SA29527

Impurities, Pantoprazole

Prantoprazole EP Impurity E

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CAS No.

: 2115779-15-0

Mol F.

: C32H28F4N6O8S2

Mol W.

: 764.72

Cat No.

: SA29105

Impurities, Pantoprazole

Prantoprazole EP Impurity F

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CAS No.

: 721924-06-7

Mol F.

: C17H17F2N3O4S

Mol W.

: 397.4

Cat No.

: SA29106

Impurities, Pravastatin

Pravastatin Lactone

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CAS No.

: 85956-22-5

Mol F.

: C23H34O6

Mol W.

: 406.51

Cat No.

: SA10801

Impurities, Praziquantel

Praziquantel

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CAS No.

: 55268-74-1

Mol F.

: C19H24N2O2

Mol W.

: 312.41

Cat No.

: SA13908

Impurities, Nitrosamine

Praziquantel nitrosamine impurity

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CAS No.

: NA

Mol F.

: C12H13N3O2

Mol W.

: 231.25

Cat No.

: SA44608

Impurities, Prazosin

Prazosin EP Impurity A

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CAS No.

: 23680-84-4

Mol F.

: C10H10ClN3O2

Mol W.

: 239.66

Cat No.

: SA24200

Impurities, Prazosin

Prazosin EP Impurity C

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CAS No.

: 60547-97-9

Mol F.

: C14H19N5O2

Mol W.

: 289.33

Cat No.

: SA24202

Impurities, Prazosin

Prazosin EP Impurity D

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CAS No.

: 40172-95-0

Mol F.

: C9H12N2O2

Mol W.

: 180.2

Cat No.

: SA24203

Impurities, Prednisolone

Prednienic Acid

$125.00 25 mg

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CAS No.

: 37927-29-0

Mol F.

: C20H26O5

Mol W.

: 346.42

Cat No.

: SA16707

Impurities, Prednisolone

Prednisolone 20-Ethyl Ester

$295.00 25 mg

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CAS No.

: 182069-19-8

Mol F.

: C25H34O7

Mol W.

: 446.53

Cat No.

: SA16718

Impurities, Prednisolone

Prednisolone-17-ethylcarbonate

$255.00 25 mg

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CAS No.

: 104286-02-4

Mol F.

: C₂₄H₃₂O₇

Mol W.

: 432.51

Cat No.

: SA16702

Impurities, Prednisolone

Prednisolone-21-acetate-17-ethylcarbonate

$395.00 25 mg

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CAS No.

: 671225-23-3

Mol F.

: C26H34O8

Mol W.

: 474.54

Cat No.

: SA16705

Impurities, Prednisolone

Prednisolone-21-propanoate

$295.00 25 mg

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CAS No.

: 5740-62-5

Mol F.

: C24H32O6

Mol W.

: 416.51

Cat No.

: SA16703

Impurities, Prednisone

Prednisone 17, 21-Diacetate

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CAS No.

: 6677-19-6

Mol F.

: C25H30O7

Mol W.

: 442.5

Cat No.

: SA26201

Impurities, Prednisone

Prednisone 21-Sulfate Ester Sodium Salt

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CAS No.

: 113092-08-3

Mol F.

: C21H25NaO8S

Mol W.

: 460.47

Cat No.

: SA26204

Impurities, Prednisone

Prednisone Epoxide Impurity | CAS NO : 7091-05-6

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CAS No.

: 7091-05-6

Mol F.

: C21H26O5

Mol W.

: 358.4

Cat No.

: SA26222

Impurities, Pregabalin

Pregabalin (R)-Phenethylamine Impurity

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CAS No.

: 3886-69-9

Mol F.

: C8H11N

Mol W.

: 121.18

Cat No.

: SA24852

Impurities, Pregabalin

Pregabalin 3-Cyano Impurity

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CAS No.

: 181289-16-7

Mol F.

: C8H13NO2

Mol W.

: 155.19

Cat No.

: SA24828

Impurities, Pregabalin

Pregabalin Diacid Impurity

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CAS No.

: 5702-99-8

Mol F.

: C8H14O4

Mol W.

: 174.2

Cat No.

: SA24846

Impurities, Pregabalin

Pregabalin Isobutyl Succinimide Impurity | CAS : 164597-78-8

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CAS No.

: 164597-78-8

Mol F.

: C8H13NO2

Mol W.

: 155.19

Cat No.

: SA24848

Impurities, Pregabalin

Pregabalin Lactose Conjugate Impurity

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CAS No.

Mol F.

: C20H35NO11

Mol W.

: 465.49

Cat No.

: SA24847

Impurities, Pregabalin

Pregabalin N-Alkyl Pyrrolidone Derivative

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CAS No.

: 1511511-44-6

Mol F.

: C10H17NO3

Mol W.

: 199.25

Cat No.

: SA24849

Impurities, Pregabalin

Pregabalin Sec Amide Impurity

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CAS No.

: 930585-94-7

Mol F.

: C17H25NO3

Mol W.

: 291.4

Cat No.

: SA24850

Impurities, Testosterone

Prenortestosterone

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CAS No.

: 1089-78-7

Mol F.

: C18H26O2

Mol W.

: 274.4

Cat No.

: SA16201

Impurities, Primidone

Primidone

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CAS No.

: 125-33-7

Mol F.

: C₁₂H₁₄N₂O₂

Mol W.

: 218.25

Cat No.

: SA20600

Impurities, Prochlorperazine Maleate

Prochlorperazine Maleate Degradant II

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CAS No.

Mol F.

: C20H24ClN3O2S

Mol W.

: 405.94

Cat No.

: SA45600

Impurities, Prochlorperazine Maleate

Prochlorperazine Maleate Degradant IV

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CAS No.

Mol F.

: C20H24ClN3OS

Mol W.

: 389.94

Cat No.

: SA45601

Impurities, Prochlorperazine Maleate

Prochlorperazine Phenothiazine Dimer Impurity

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CAS No.

: NA

Mol F.

: C27H20Cl2N2S2

Mol W.

: 507.50

Cat No.

: SA45606

Impurities, Progesterone

Progesterone

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CAS No.

: 57-83-0

Mol F.

: C21H30O2

Mol W.

: 314.46

Cat No.

: SA18000

Impurities, Progesterone

Progesterone 17α-Hydroxy Impurity

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CAS No.

: 68-96-2

Mol F.

: C21H30O3

Mol W.

: 330.46

Cat No.

: SA18016

Impurities, Progesterone

Progesterone EP Impurity I

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CAS No.

: 24254-01-1

Mol F.

: C22H32O2

Mol W.

: 328.49

Cat No.

: SA18007

Impurities, Progesterone

Progesterone EP Impurity L

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CAS No.

: 2257421-80-8

Mol F.

: C22H30O2

Mol W.

: 326.48

Cat No.

: SA18010

Impurities, Promazine

Promazine

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CAS No.

: 58-40-2

Mol F.

: C17H20N2S

Mol W.

: 284.4

Cat No.

: SA49800

Impurities, Promazine

Promazine EP Impurity A

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CAS No.

: 146-21-4

Mol F.

: C17H20N2OS

Mol W.

: 300.4

Cat No.

: SA49801

Impurities, Promazine

Promazine EP Impurity B

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CAS No.

: 17140-12-4

Mol F.

: C16H18N2S : HCl

Mol W.

: 270.4 : 36.5

Cat No.

: SA49802

Impurities, Promazine

Promazine EP Impurity C

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CAS No.

: 92-84-2

Mol F.

: C12H9NS

Mol W.

: 199.3

Cat No.

: SA49803