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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, 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

Impurities, 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

Please enquire for price & pack size

In Stock

CAS No.

: 154709-18-9

Mol F.

: C33H26N4O

Mol W.

: 494.59

Cat No.

: SA23308

Impurities, Irbesartan

Irbesartan Lactam Impurity

Please enquire for price & pack size

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, 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

Please enquire for price & pack size

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

Please enquire for price & pack size

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

Please enquire for price & pack size

In Stock

CAS No.

: 79725-98-7

Mol F.

: C38H66O6

Mol W.

: 618.94

Cat No.

: SA48000

Impurities, Tenofovir

L-Alanine

Please enquire for price & pack size

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

Impurities, Leflunomide

Leflunomide EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 455-14-1

Mol F.

: C7H6F3N

Mol W.

: 161.12

Cat No.

: SA21801

Impurities, Leflunomide

Leflunomide EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 163451-81-8(ZIsomer),108605-62-5(E/ZMixture)

Mol F.

: C12H9F3N2O2

Mol W.

: 270.20999999999998

Cat No.

: SA21802

Impurities, Lercanidipine

Lercanidipine Acid

Please enquire for price & pack size

In Stock

CAS No.

: 855592-30-2

Mol F.

: C35H39N3O6

Mol W.

: 597.7

Cat No.

: SA50909

Impurities, Lercanidipine

Lercanidipine Diethyl Ester Impurity

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C19H22N2O6

Mol W.

: 374.39

Cat No.

: SA50915

Impurities, Lercanidipine

Lercanidipine Dimethyl Ester Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 21881-77-6

Mol F.

: C17H18N2O6

Mol W.

: 346.33

Cat No.

: SA50916

Impurities, Lercanidipine

Lercanidipine Dipropyl Ester Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 77888-05-2

Mol F.

: C21H26N2O6

Mol W.

: 402.44

Cat No.

: SA50910

Impurities, Lercanidipine

Lercanidipine EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 74936-72-4

Mol F.

: C16H16N2O6

Mol W.

: 332.3

Cat No.

: SA50902

Impurities, Lercanidipine

Lercanidipine EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 39562-70-4

Mol F.

: C18H20N2O6

Mol W.

: 360.36

Cat No.

: SA50914

Impurities, Lercanidipine

Lercanidipine EP Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 887769-34-8 (free base)

Mol F.

: C36H40ClN3O6

Mol W.

: 646.17

Cat No.

: SA50904

Impurities, Lercanidipine

Lercanidipine EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 100442-33-9

Mol F.

: C20H27NO

Mol W.

: 297.43

Cat No.

: SA50907

Impurities, Lercanidipine

Lercanidipine Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 1119226-97-9

Mol F.

: C35H37N3O6

Mol W.

: 595.68

Cat No.

: SA50903

Impurities, Lercanidipine

Lercanidipine Nitroso Impurity 1

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C16H18N2O

Mol W.

: 254.3

Cat No.

: SA50913

Impurities, Salbutamol

Levalbuterol Related Compound E HCl

Please enquire for price & pack size

In Stock

CAS No.

: 69716-64-9

Mol F.

: C15H26ClNO3

Mol W.

: 303.82

Cat No.

: SA26021

Impurities, Levetiracetam

Levetiracetam Carboxylic Acid

Please enquire for price & pack size

In Stock

CAS No.

: 102849-49-0

Mol F.

: C8H13NO3

Mol W.

: 171.19

Cat No.

: SA46002

Impurities, Levofloxacin

Levofloxacin EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 117707-40-1

Mol F.

: C17H18FN3O4

Mol W.

: 347.34

Cat No.

: SA18401

Impurities, Levofloxacin

Levofloxacin EP Impurity F

Please enquire for price & pack size

In Stock

CAS No.

: 100986-89-8

Mol F.

: C13H9F2NO4

Mol W.

: 281.20999999999998

Cat No.

: SA18402

Impurities, Levonorgestrel

Levonorgestrel EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 19914-67-1

Mol F.

: C₂₁H₂₈O₂

Mol W.

: 312.45

Cat No.

: SA23707

Impurities, Levonorgestrel

Levonorgestrel EP Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 1337972-89-0

Mol F.

: C₂₃H₂₈O

Mol W.

: 320.47000000000003

Cat No.

: SA23708

Impurities, Levonorgestrel

Levonorgestrel EP Impurity H

Please enquire for price & pack size

In Stock

CAS No.

: 55555-97-0

Mol F.

: C₂₁H₂₈O₃

Mol W.

: 328.45

Cat No.

: SA23711

Impurities, Levonorgestrel

Levonorgestrel EP Impurity J

Please enquire for price & pack size

In Stock

CAS No.

: 1175109-63-3

Mol F.

: C21H26O3

Mol W.

: 326.43

Cat No.

: SA23713

Impurities, Levonorgestrel

Levonorgestrel EP Impurity K

Please enquire for price & pack size

In Stock

CAS No.

: 793-55-5

Mol F.

: C19H28O2

Mol W.

: 288.42

Cat No.

: SA23726