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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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Hyoscine Butylbromide

Hyoscine Butylbromide EP Impurity F

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In Stock

CAS No.

Mol F.

: C21H30BrNO4

Mol W.

: 440.37

Cat No.

: SA46106

Ibrutinib, Impurities

Ibrutinib Acetyl Impurity

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In Stock

CAS No.

: 1288338-95-3

Mol F.

: C24H24N6O2

Mol W.

: 428.5

Cat No.

: SA47401

Ibrutinib, Impurities

Ibrutinib Boc-Amine Impurity

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In Stock

CAS No.

: 1022150-11-3

Mol F.

: C27H30N6O3

Mol W.

: 486.6

Cat No.

: SA47405

Ibrutinib, Impurities

Ibrutinib deacryloylpiperidine; Ibrutinib N-Despiperidinyl Impurity

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In Stock

CAS No.

: 330786-24-8

Mol F.

: C17H13N5O

Mol W.

: 303.32

Cat No.

: SA47418

Ibrutinib, Impurities

Ibrutinib Methoxy Impurity

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In Stock

CAS No.

: 2031255-26-0

Mol F.

: C26H28N6O3

Mol W.

: 472.55

Cat No.

: SA47417

Ibrutinib, Impurities

Ibrutinib N-Oxide Impurity

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In Stock

CAS No.

: 2417548-74-2

Mol F.

: C25H24N6O3

Mol W.

: 456.5

Cat No.

: SA47400

Ibrutinib, Impurities

Ibrutinib Propionamide Impurity

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In Stock

CAS No.

: 1839099-22-7

Mol F.

: C25H26N6O2

Mol W.

: 442.5

Cat No.

: SA47403

Ibrutinib, Impurities

Ibrutinib S-isomer Impurity

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In Stock

CAS No.

: 936563-97-2

Mol F.

: C25H24N6O2

Mol W.

: 440.5

Cat No.

: SA47406

Carbamazepine, Impurities

Iminostilbene acetate

$95.00 25 mg

In Stock

CAS No.

: 19209-60-0

Mol F.

: C16H13NO

Mol W.

: 235.28

Cat No.

: SA20307

Clomipramine, Impurities

Imipramine

$95.00 25 mg

In Stock

CAS No.

: 113-52-0

Mol F.

: C19H24N2

Mol W.

: 280.41

Cat No.

: SA33705

Imipramine, Impurities

Imipramine EP Impurity B

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In Stock

CAS No.

: 58262-51-4

Mol F.

: C19H23ClN2

Mol W.

: 314.85

Cat No.

: SA45801

Betamethasone, Impurities

Impurity at RRT 0.49 Spiro Impurity

$495.00 25 mg

In Stock

CAS No.

Mol F.

: C22H27FO4

Mol W.

: 374.45

Cat No.

: SA26612

Impurities, Indacaterol

Indacaterol Related Compound 1

$500.00 25 mg

In Stock

CAS No.

: 1026461-20-0

Mol F.

: C22H24N2O3

Mol W.

: 364.44

Cat No.

: SA48706

Impurities, Indacaterol

Indacaterol S-Enantiomer; (S)-Indacaterol

$500.00 25 mg

In Stock

CAS No.

: 1235445-80-3 (Base); 1384188-70-8 (HCl)

Mol F.

: C24H28N2O3

Mol W.

: 392.49

Cat No.

: SA48704

Fluticasone Furoate, Impurities

Iodo Fluticasone Furoate

$300.00 25 mg

In Stock

CAS No.

Mol F.

: C27H29F2IO6S

Mol W.

: 646.48

Cat No.

: SA48212

Apixaban, Impurities

Iodophenyl Ethyl Ester Apixaban Impurity

$245.00 25 mg

In Stock

CAS No.

: 473927-64-9

Mol F.

: C22H20IN3O4

Mol W.

: 517.32

Cat No.

: SA39917

Ipratropium Bromide

Ipratropium EP Impurity A

$150.00 25 mg

In Stock

CAS No.

: 58005-18-8

Mol F.

: C11H22BrNO

Mol W.

: 264.2

Cat No.

: SA36001

Ipratropium Bromide

Ipratropium EP Impurity B; 8-anti-Ipratropium Bromide

$450.00 25 mg

In Stock

CAS No.

: 58073-59-9

Mol F.

: C20H30BrNO3

Mol W.

: 412.36

Cat No.

: SA36002

Ipratropium Bromide

Ipratropium EP Impurity C; Tropic Acid

$80.00 25 mg

In Stock

CAS No.

: 552-63-6

Mol F.

: C9H10O3

Mol W.

: 166.17

Cat No.

: SA36003

Ipratropium Bromide

Ipratropium EP Impurity D; Atropic Acid

$80.00 25 mg

In Stock

CAS No.

: 492-38-6

Mol F.

: C9H8O2

Mol W.

: 148.16

Cat No.

: SA36004

Ipratropium Bromide

Ipratropium EP Impurity E

$180.00 25 mg

In Stock

CAS No.

: 183626-76-8; 22235-81-0

Mol F.

: C₁₉H₂₇NO₃

Mol W.

: 317.42

Cat No.

: SA36005

Ipratropium Bromide

Ipratropium EP Impurity F

$280.00 25 mg

In Stock

CAS No.

: 17812-46-3; 60018-35-1

Mol F.

: C20H28NO2

Mol W.

: 314.44

Cat No.

: SA36006

Impurities, Irbesartan

Irbesartan Cyano Impurity

$80.00 25 mg

In Stock

CAS No.

: 138401-24-8

Mol F.

: C25H27N3O

Mol W.

: 385.5

Cat No.

: SA23300

Impurities, Irbesartan

Irbesartan Hydroxy Impurity

$125.00 25 mg

In Stock

CAS No.

: 160514-13-6

Mol F.

: C14H12N4O

Mol W.

: 252.27

Cat No.

: SA23307

Impurities, Irbesartan

Irbesartan Hydroxy N2-Trityl Impurity

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In Stock

CAS No.

: 154709-18-9

Mol F.

: C33H26N4O

Mol W.

: 494.59

Cat No.

: SA23308

Impurities, Irbesartan

Irbesartan Lactam Impurity

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In Stock

CAS No.

: 151257-01-1

Mol F.

: C11H19ClN2O

Mol W.

: 230.73

Cat No.

: SA23301

Impurities, Irganox

Irganox-259

Please enquire for price & pack size

In Stock

CAS No.

: 35074-77-2

Mol F.

: C40H62O6

Mol W.

: 638.924

Cat No.

: SA11101

Impurities, Isavuconazole

Isavuconazole API

$80.00 25 mg

In Stock

CAS No.

: 241479-67-4

Mol F.

: C22H17F2N5OS

Mol W.

: 437.47

Cat No.

: SA44100

Impurities, Isavuconazole

Isavuconazonium Sulfate | CAS : 946075-13-4

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In Stock

CAS No.

: 946075-13-4

Mol F.

: C35H36F2N8O9S2

Mol W.

: 814.84

Cat No.

: SA44137

Impurities, Tiotropium

Iso Tiotropium Bromide

$350.00 25 mg

In Stock

CAS No.

: 136431-94-2

Mol F.

: C19H22BrNO4S2

Mol W.

: 472.42

Cat No.

: SA11712

Impurities, Miconazole

Isoconazole; Miconazole 2,6-Isomer

Please enquire for price & pack size

In Stock

CAS No.

: 27523-40-6

Mol F.

: C18H14Cl4N2O

Mol W.

: 416.13

Cat No.

: SA51505

Impurities, Valsartan

Isoleucine Valsartan

$195.00 50 mg

In Stock

CAS No.

: 137862-78-3

Mol F.

: C25H31N5O3

Mol W.

: 449.54

Cat No.

: SA33304

Impurities, Losartan

Isomeric Impurity of Losartan

$395.00 25 mg

In Stock

CAS No.

Mol F.

: C22H20ClN3O

Mol W.

: 377.86

Cat No.

: SA26726

Impurities, Isoproterenol

Isoprenaline EP Impurity A; Isoproterenone

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In Stock

CAS No.

: 121-28-8(base);16899-81-3(HClSalt)

Mol F.

: C11H15NO3

Mol W.

: 209.24

Cat No.

: SA25901

Impurities, Pregabalin

Isopropyl DL-Mandelate

$95.00 25 mg

In Stock

CAS No.

: 4118-51-8

Mol F.

: C11H14O3

Mol W.

: 194.23

Cat No.

: SA24837

Impurities, Kojic Acid Dipalmitate

Kojic Acid Dipalmitate

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In Stock

CAS No.

: 79725-98-7

Mol F.

: C38H66O6

Mol W.

: 618.94

Cat No.

: SA48000

Impurities, Tenofovir

L-Alanine

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In Stock

CAS No.

: 56-41-7

Mol F.

: C3H7NO2

Mol W.

: 89.09

Cat No.

: SA36933

Cefadroxil, Impurities

L-Cefadroxil

Please enquire for price & pack size

In Stock

CAS No.

: 144790-28-3

Mol F.

: C18H18F3N3O7S

Mol W.

: 477.41

Cat No.

: SA42312

Cephalexin, Impurities

L-Cephalexin

Please enquire for price & pack size

In Stock

CAS No.

: 34632-04-7

Mol F.

: C16H17N3O4S

Mol W.

: 347.39

Cat No.

: SA12005

Impurities, Molnupiravir

L-Cytidine

Please enquire for price & pack size

In Stock

CAS No.

: 26524-60-7

Mol F.

: C9H13N3O5

Mol W.

: 243.22

Cat No.

: SA46212

Benazepril, Impurities

L-Proline; Prol (LIS-3) standard

Please enquire for price & pack size

In Stock

CAS No.

: 147-85-3

Mol F.

: C5H9NO2

Mol W.

: 115.03

Cat No.

: SA29613

Impurities, Lorcaserin

Lactum analog

Please enquire for price & pack size

In Stock

CAS No.

: 824430-77-5

Mol F.

: C11H12ClNO

Mol W.

: 209.07

Cat No.

: SA18806

Impurities, Lamivudine

Lamivudine Acid; Lamivudine EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 173829-09-9

Mol F.

: C8H9N3O4S

Mol W.

: 243.24

Cat No.

: SA22302

Impurities, Lamivudine

Lamivudine EP Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 69-72-7

Mol F.

: C7H6O3

Mol W.

: 138.12

Cat No.

: SA22312

Impurities, Lamivudine

Lamivudine EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 71-30-7

Mol F.

: C4H5N3O

Mol W.

: 111.1

Cat No.

: SA22310

Impurities, Lamivudine

Lamivudine EP Impurity F

Please enquire for price & pack size

In Stock

CAS No.

: 66-22-8

Mol F.

: C₄H₄N₂O₂

Mol W.

: 112.09

Cat No.

: SA22311

Impurities, Lamivudine

Lamivudine EP Impurity J

Please enquire for price & pack size

In Stock

CAS No.

: 145986-07-8

Mol F.

: C8H10N2O4S

Mol W.

: 230.24

Cat No.

: SA22309

Impurities, Lamivudine

Lamivudine Impurity (R-sulphoxide); Lamivudine EP Impurity H

Please enquire for price & pack size

In Stock

CAS No.

: 160552-54-5

Mol F.

: C8H11N3O4S

Mol W.

: 245.26

Cat No.

: SA22300

Impurities, Lamivudine

Lamivudine Impurity (S-sulphoxide); Lamivudine EP Impurity G

Please enquire for price & pack size

In Stock

CAS No.

: 160552-55-6

Mol F.

: C₈H₁₁N₃O₄S

Mol W.

: 245.26

Cat No.

: SA22301

Impurities, Loteprednol

Le-8,9-Dehydro (IMPURITY 4)

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C24H29ClO7

Mol W.

: 464.94

Cat No.

: SA27615