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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, Pemetrexed

PMD-Diester DMF Complex

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In Stock

CAS No.

: 1802552-05-1

Mol F.

: C27H34N6O6

Mol W.

: 538.6

Cat No.

: SA32323

Impurities, Pemetrexed

PMT-1 – 1.03 RRT impurity

$280.00 25 mg

In Stock

CAS No.

: 1265908-62-0

Mol F.

: C28H34N6O9

Mol W.

: 598.6

Cat No.

: SA32320

Impurities, Praziquantel

Praziquantel Related Compound A

$200.00 25 mg

In Stock

CAS No.

: 54761-87-4

Mol F.

: C19H18N2O2

Mol W.

: 306.36

Cat No.

: SA13901

Impurities, Praziquantel

Praziquantel Related Compound B

$200.00 25 mg

In Stock

CAS No.

: 125273-86-1

Mol F.

: C19H22N2O2

Mol W.

: 310.39

Cat No.

: SA13902

Impurities, Praziquantel

Praziquantel Related Compound C

$200.00 25 mg

In Stock

CAS No.

: 125273-88-3

Mol F.

: C19H22N2O4

Mol W.

: 342.39

Cat No.

: SA13903

Impurities, Prazosin

Prazosin EP Impurity B

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In Stock

CAS No.

: 31350-27-3

Mol F.

: C14H14N2O4

Mol W.

: 274.27

Cat No.

: SA24201

Impurities, Prednisolone

Prednisolone

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In Stock

CAS No.

: 50-24-8

Mol F.

: C21H28O5

Mol W.

: 360.44

Cat No.

: SA16701

Impurities, Prednisolone

Prednisolone 17,21-Diacetate

$195.00 25 mg

In Stock

CAS No.

: 17652-24-3

Mol F.

: C25H32O7

Mol W.

: 444.52

Cat No.

: SA16717

Impurities, Loteprednol

Prednisolone 20-Ethyl Ester

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In Stock

CAS No.

: 182069-19-8

Mol F.

: C25H34O7

Mol W.

: 446.53

Cat No.

: SA27609

Impurities, Prednisolone

Prednisolone Acetate EP Impurity C (Prednisolone Diacetate)

$175.00 25 mg

In Stock

CAS No.

: 98523-85-4

Mol F.

: C25H32O7

Mol W.

: 444.53

Cat No.

: SA16711

Impurities, Prednisolone

Prednisolone Acetate EP Impurity E (Deltacortinene Acetate)

$175.00 25 mg

In Stock

CAS No.

: 4380-55-6

Mol F.

: C23H28O5

Mol W.

: 384.48

Cat No.

: SA16713

Impurities, Prednisolone

Prednisolone Acetate Impurity (Deltoxenol)

$195.00 25 mg

In Stock

CAS No.

: 20423-99-8

Mol F.

: C21H28O4

Mol W.

: 344.45

Cat No.

: SA16712

Impurities, Loteprednol

Prednisolone dicarbonate

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In Stock

CAS No.

: 133991-62-5

Mol F.

: C26H34O9

Mol W.

: 490.54

Cat No.

: SA27610

Impurities, Prednisolone

Prednisolone EP Impurity F

$495.00 25 mg

In Stock

CAS No.

: 600-90-8

Mol F.

: C21H28O5

Mol W.

: 360.45

Cat No.

: SA16708

Impurities, Prednisolone

Prednisolone-17-acetate

$195.00 25 mg

In Stock

CAS No.

: 52628-64-5

Mol F.

: C23H30O6

Mol W.

: 402.48

Cat No.

: SA16714

Impurities, Prednisolone

Prednisolone-17-Valarate

$295.00 25 mg

In Stock

CAS No.

: 15180-00-4

Mol F.

: C26H36O6

Mol W.

: 444.56

Cat No.

: SA16716

Impurities, Prednisolone

Prednisolone-21-ethylcarbonate

$195.00 25 mg

In Stock

CAS No.

: 2205-88-1

Mol F.

: C24H32O7

Mol W.

: 432.5

Cat No.

: SA16704

Impurities, Prednisolone

Prednisolone-21-formiate Impurity | CAS : 2141-22-2

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In Stock

CAS No.

: 2141-22-2

Mol F.

: C22H28O6

Mol W.

: 388.46

Cat No.

: SA16721

Impurities, Prednisolone

Prednisolone-21-Valarate

$175.00 25 mg

In Stock

CAS No.

: 39791-31-6

Mol F.

: C26H36O6

Mol W.

: 444.56

Cat No.

: SA16715

Impurities, Prednisone

Prednisone

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In Stock

CAS No.

: 53-03-2

Mol F.

: C21H26O5

Mol W.

: 358.43

Cat No.

: SA26200

Impurities, Prednisone

Prednisone 21-Acetate

$95.00 25 mg

In Stock

CAS No.

: 125-10-0

Mol F.

: C23H28O6

Mol W.

: 400.46

Cat No.

: SA26203

Impurities, Prednisone

Prednisone 21-Aldehyde

Please enquire for price & pack size

In Stock

CAS No.

: 70522-55-3

Mol F.

: C21H24O5

Mol W.

: 356.41

Cat No.

: SA26202

Impurities, Prednisone

Prednisone EP Impurity K

Please enquire for price & pack size

In Stock

CAS No.

: 7738-93-4

Mol F.

: C19H22O3

Mol W.

: 298.38

Cat No.

: SA26219

Impurities, Pregabalin

Pregabalin Dimer Impurity

$395.00 25 mg

In Stock

CAS No.

: 2361911-35-3

Mol F.

: C17H30N2O2

Mol W.

: 294.4

Cat No.

: SA24844

Impurities, Pregabalin

Pregabalin Impurity C

$95.00 25 mg

In Stock

CAS No.

: 90-64-2

Mol F.

: C₈H₈O₃

Mol W.

: 152.15

Cat No.

: SA24840

Impurities, Pregabalin

Pregabalin Lactam Impurity

$120.00 25 mg

In Stock

CAS No.

: 61312-87-6

Mol F.

: C8H15NO

Mol W.

: 141.21

Cat No.

: SA24800

Impurities, Pregabalin

Pregabalin Racemate

$95.00 25 mg

In Stock

CAS No.

: 128013-69-4

Mol F.

: C8H17NO2

Mol W.

: 159.23

Cat No.

: SA24801

Impurities, Primidone

Primidone Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 7206-76-0

Mol F.

: C11H14N2O2

Mol W.

: 206.24

Cat No.

: SA20601

Impurities, Primidone

Primidone Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 50-06-6

Mol F.

: C12H12N2O3

Mol W.

: 232.1

Cat No.

: SA20602

Impurities, Primidone

Primidone Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 90-26-6

Mol F.

: C10H13NO

Mol W.

: 163.226

Cat No.

: SA20603

Impurities, Primidone

Primidone Impurity D

Please enquire for price & pack size

In Stock

CAS No.

: 80544-75-8

Mol F.

: C11H12N2O

Mol W.

: 188.22

Cat No.

: SA20604

Impurities, Primidone

Primidone Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 90-27-7

Mol F.

: C10H12O2

Mol W.

: 164.204

Cat No.

: SA20605

Impurities, Primidone

Primidone Impurity F

Please enquire for price & pack size

In Stock

CAS No.

: 1189504-46-8

Mol F.

: C21H24N2O2

Mol W.

: 336.43

Cat No.

: SA20606

Chlorpromazine, Impurities

Prochlorperazine

$155.00 25 mg

In Stock

CAS No.

: 58-38-8

Mol F.

: C20H24ClN3S

Mol W.

: 373.94

Cat No.

: SA21616

Impurities, Progesterone

Progesterone EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 145-14-2

Mol F.

: C21H32O2

Mol W.

: 316.48

Cat No.

: SA18001

Impurities, Progesterone

Progesterone EP Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 145-15-3

Mol F.

: C21H32O2

Mol W.

: 316.48

Cat No.

: SA18002

Impurities, Progesterone

Progesterone EP Impurity D

Please enquire for price & pack size

In Stock

CAS No.

: 5035-09-6

Mol F.

: C23H34O3

Mol W.

: 358.51

Cat No.

: SA18003

Impurities, Progesterone

Progesterone EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 5062-62-4

Mol F.

: C23H34O3

Mol W.

: 358.51

Cat No.

: SA18004

Impurities, Progesterone

Progesterone EP Impurity F

Please enquire for price & pack size

In Stock

CAS No.

: 2257421-78-4

Mol F.

: C27H38O2

Mol W.

: 394.59

Cat No.

: SA18015

Impurities, Progesterone

Progesterone EP Impurity H

Please enquire for price & pack size

In Stock

CAS No.

: 1162-56-7

Mol F.

: C21H28O2

Mol W.

: 312.44

Cat No.

: SA18006

Impurities, Progesterone

Progesterone EP Impurity J

Please enquire for price & pack size

In Stock

CAS No.

: 1162-54-5

Mol F.

: C21H28O2

Mol W.

: 312.44

Cat No.

: SA18008

Impurities, Progesterone

Progesterone EP Impurity K

Please enquire for price & pack size

In Stock

CAS No.

: 17652-16-3

Mol F.

: C21H28O2

Mol W.

: 312.44

Cat No.

: SA18009

Impurities, Progesterone

Progesterone EP Impurity M

Please enquire for price & pack size

In Stock

CAS No.

: 2000-66-0

Mol F.

: C21H30O2

Mol W.

: 314.46

Cat No.

: SA18011

Impurities, Propranolol

Propranolol Beta Naphthol Epoxide Impurity

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C13H12O2

Mol W.

: 200.23

Cat No.

: SA24616

Impurities, Propranolol

Propranolol Chloro impurity

Please enquire for price & pack size

In Stock

CAS No.

: 112805-69-3

Mol F.

: C13H13ClO2

Mol W.

: 236.69

Cat No.

: SA24601

Impurities, Propranolol

Propranolol EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 36112-95-5

Mol F.

: C13H14O3

Mol W.

: 218.25

Cat No.

: SA24603

Impurities, Propranolol

Propranolol EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 83314-78-7

Mol F.

: C29H33NO4

Mol W.

: 459.57

Cat No.

: SA24602

Impurities, Propranolol

Propranolol EP Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 17216-10-3

Mol F.

: C23H20O3

Mol W.

: 344.4

Cat No.

: SA24600

Impurities, Propranolol

Propranolol Epoxide impurity

Please enquire for price & pack size

In Stock

CAS No.

: 2461-42-9

Mol F.

: C13H12O2

Mol W.

: 200.23

Cat No.

: SA24609

Impurities, Propranolol

Propranolol ethyl Amine Impurity

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C15H19NO2

Mol W.

: 245.32

Cat No.

: SA24612