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Impurities

SynThink is a producer and supplier of a number of pharmaceutical Reference Standards (Impurity Standards) which are required for pharmaceutical companies to study quality, stability and biological safety of pharmaceutical products. Many API Impurities are available in our stock.

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Impurities, Pemetrexed

Pemetrexed Monomethyl Ester 2

$495.00 25 mg

In Stock

CAS No.

: 1265908-60-8; 1265908-64-2

Mol F.

: C21H23N5O6

Mol W.

: 441.44

Cat No.

: SA32319

Impurities, Penciclovir

Penciclovir API

Please enquire for price & pack size

In Stock

CAS No.

: 39809-25-1

Mol F.

: C10H15N5O3

Mol W.

: 253.26

Cat No.

: SA27711

Impurities, Penciclovir

Penciclovir Diacetate; Penciclovir Impurity C

$155.00 25 mg

In Stock

CAS No.

: 97845-72-2

Mol F.

: C14H19N5O5

Mol W.

: 337.33

Cat No.

: SA27705

Impurities, Permethrin

Permethrin (API) CAS : 52645-53-1

Please enquire for price & pack size

In Stock

CAS No.

: 52645-53-1

Mol F.

: C21H20Cl2O3

Mol W.

: 391.29

Cat No.

: SA51900

Apixaban, Impurities

Phenylamino Carboxylic Acid Apixaban Impurity

$95.00 25 mg

In Stock

CAS No.

: 1704504-93-7

Mol F.

: C20H18N4O4

Mol W.

: 378.38

Cat No.

: SA39912

Apixaban, Impurities

Phenylamino Carboxylic Ethyl Ester Apixaban Impurity

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C22H20N4O4

Mol W.

: 404.42

Cat No.

: SA39911

Apixaban, Impurities

Phenylamino Carboxylic Methyl Ester Apixaban Impurity

$95.00 25 mg

In Stock

CAS No.

: 1466571-07-2

Mol F.

: C21H20N4O4

Mol W.

: 392.41

Cat No.

: SA39913

Impurities, Nintedanib

Piperazine Nintedanib Dimer

$345.00 25 mg

In Stock

CAS No.

: 2410284-90-9

Mol F.

: C56H52N8O8

Mol W.

: 965.06

Cat No.

: SA22512

Impurities, Linagliptin

Piperidin-3-amine dihydrochloride

Please enquire for price & pack size

In Stock

CAS No.

: 138060-07-8

Mol F.

: C5H14Cl2N2

Mol W.

: 173.08

Cat No.

: SA49929

Impurities, Pitavastatin

Pitavastatin (3R,5R)-Isomer

$295.00 25 mg

In Stock

CAS No.

: 254452-96-5 (calcium salt); 769908-13-6 (acid)

Mol F.

: C25H23FNO4.1/2Ca

Mol W.

: 420.45

Cat No.

: SA29501

Impurities, Pitavastatin

Pitavastatin (3S,5R)-Isomer

$950.00 25 mg

In Stock

CAS No.

: 254452-88-5

Mol F.

: C25H23FNO4 . 1/2Ca

Mol W.

: 420.45

Cat No.

: SA29502

Impurities, Pitavastatin

Pitavastatin (3S,5S)-Isomer

$695.00 25 mg

In Stock

CAS No.

: 254452-92-1

Mol F.

: C25H23FNO4 . 1/2Ca

Mol W.

: 420.45

Cat No.

: SA29503

Impurities, Pitavastatin

Pitavastatin (Z)-Isomer

$250.00 25 mg

In Stock

CAS No.

: 1159588-21-2

Mol F.

: C25H23FNO4

Mol W.

: 420.45

Cat No.

: SA29505

Impurities, Pitavastatin

Pitavastatin 5-Oxo Acid

$495.00 25 mg

In Stock

CAS No.

: 222306-15-2

Mol F.

: C25H22FNO4

Mol W.

: 419.44

Cat No.

: SA29519

Impurities, Pitavastatin

Pitavastatin Desfluoro

$850.00 25 mg

In Stock

CAS No.

: 847849-67-6(acid)

Mol F.

: C25H25NO4

Mol W.

: 403.47

Cat No.

: SA29506

Impurities, Pitavastatin

Pitavastatin Lactone

$110.00 25 mg

In Stock

CAS No.

: 141750-63-2

Mol F.

: C25H22FNO3

Mol W.

: 403.45

Cat No.

: SA29515

Impurities, Pitavastatin

Pitavastatin Methyl Ester

$170.00 25 mg

In Stock

CAS No.

: 849811-78-5

Mol F.

: C26H26FNO4

Mol W.

: 435.49

Cat No.

: SA29512

Impurities, Pitavastatin

Pitavastatin t-Butyl Ester

$150.00 25 mg

In Stock

CAS No.

: 586966-54-3

Mol F.

: C₂₉H₃₂FNO₄

Mol W.

: 477.57

Cat No.

: SA29514

Impurities, Pemetrexed

PMD-Diacid DMF Complex

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C23H26N6O6

Mol W.

: 482.49

Cat No.

: SA32325

Impurities, Pemetrexed

PMD-Diester DMF Complex

Please enquire for price & pack size

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

Please enquire for price & pack size

In Stock

CAS No.

: 31350-27-3

Mol F.

: C14H14N2O4

Mol W.

: 274.27

Cat No.

: SA24201

Impurities, Prednisolone

Prednisolone

Please enquire for price & pack size

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

Please enquire for price & pack size

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

Please enquire for price & pack size

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

Please enquire for price & pack size

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

Please enquire for price & pack size

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