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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, Linagliptin

Linagliptin N,N`-Methylene Dimer

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In Stock

CAS No.

: 2489212-72-6

Mol F.

: C51H56N16O4

Mol W.

: 957.12

Cat No.

: SA49948

Impurities, Linagliptin

Linagliptin Phthalimide Impurity

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In Stock

CAS No.

: 886588-63-2

Mol F.

: C33H30N8O4

Mol W.

: 602.7

Cat No.

: SA49909

Impurities, Linagliptin

Linagliptin Regio Isomer

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In Stock

CAS No.

: 1446263-38-2

Mol F.

: C25H28N8O2

Mol W.

: 472.54

Cat No.

: SA49940

Impurities, Linagliptin

Linagliptin Related Compound A

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In Stock

CAS No.

: 666816-98-4

Mol F.

: C10H9BrN4O2

Mol W.

: 297.1

Cat No.

: SA49922

Impurities, Linagliptin

Linagliptin S-Isomer

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In Stock

CAS No.

: 668270-11-9

Mol F.

: C25H28N8O2

Mol W.

: 472.54

Cat No.

: SA49902

Clindamycin, Impurities

Lincomycin

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In Stock

CAS No.

: 154-21-2

Mol F.

: C₁₈H₃₄N₂O₆S

Mol W.

: 406.54

Cat No.

: SA29705

Clindamycin, Impurities

Lincomycin EP Impurity F

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In Stock

CAS No.

: 14810-93-6

Mol F.

: C9H19NO5S

Mol W.

: 253.32

Cat No.

: SA29714

Clindamycin, Impurities

Lincomycin Hydrochloride EP Impurity D

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In Stock

CAS No.

: 26389-84-4

Mol F.

: C18H35ClN2O6S

Mol W.

: 443

Cat No.

: SA29717

Impurities, Linezolid

Linezolid Amine Impurity

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In Stock

CAS No.

: 93246-53-8

Mol F.

: C₁₀H₁₃FN₂O

Mol W.

: 196.22

Cat No.

: SA17516

Impurities, Linezolid

Linezolid Desacetamide Descarbonyl Phthalimide (R)-Isomer

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In Stock

CAS No.

: 874340-08-6

Mol F.

: C21H22FN3O4

Mol W.

: 399.42

Cat No.

: SA17521

Impurities, Linezolid

Linezolid Diphthalimide

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In Stock

CAS No.

: 1798014-14-8

Mol F.

: C32H31FN4O7

Mol W.

: 602.61

Cat No.

: SA17520

Impurities, Linezolid

Linezolid Diphthalimide Methyl Carbamate Dimer

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In Stock

CAS No.

Mol F.

: C36H35FN4O11

Mol W.

: 718.68

Cat No.

: SA17522

Impurities, Linezolid

Linezolid Diphthalimide Methyl Carbamate Monomer

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In Stock

CAS No.

Mol F.

: C34H33FN4O9

Mol W.

: 660.65

Cat No.

: SA17523

Linezolid

Linezolid hydroxy intermediate

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In Stock

CAS No.

: NA

Mol F.

: C14H17FN2O4

Mol W.

: 296.12

Cat No.

: SA17519

Impurities, Linezolid

Linezolid Mono Acid Impurity

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In Stock

CAS No.

: NA

Mol F.

: C22H22FN3O6

Mol W.

: 443.42

Cat No.

: SA17532

Impurities, Linezolid

Linezolid N-Oxide

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In Stock

CAS No.

: 189038-36-6

Mol F.

: C16H20FN3O5

Mol W.

: 353.35

Cat No.

: SA17524

Impurities, Linezolid

Linezolid USP RC D

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In Stock

CAS No.

: 2180621-71-8

Mol F.

: C₁₅H₁₉FN₂O₆S

Mol W.

: 374.38

Cat No.

: SA17518

Impurities, Lisinopril

Lisinopril (S,S,R)-Diketopiperazine

$225.00 25 mg

In Stock

CAS No.

: 219677-82-4

Mol F.

: C21H29N3O4

Mol W.

: 387.47

Cat No.

: SA35704

Impurities, Lisinopril

Lisinopril Cyclohexyl Impurity

$495.00 25 mg

In Stock

CAS No.

: 1132650-67-9

Mol F.

: C21H37N3O5

Mol W.

: 411.54

Cat No.

: SA35706

Impurities, Lisinopril

Lisinopril Diketopiperazine Impurity

$275.00 25 mg

In Stock

CAS No.

: 328385-86-0

Mol F.

: C21H29N3O4

Mol W.

: 387.47

Cat No.

: SA35703

Impurities, Ursodiol

Lithocholic Acid

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In Stock

CAS No.

: 434-13-9

Mol F.

: C24H40O3

Mol W.

: 376.57

Cat No.

: SA31203

Impurities, Loratadine

Loratadine 2-Acid

$495.00 25 mg

In Stock

CAS No.

Mol F.

: C23H23ClN2O4

Mol W.

: 426.89

Cat No.

: SA34027

Impurities, Loratadine

Loratadine 2-Hydroxymethyl Impurity

$595.00 25 mg

In Stock

CAS No.

: 609806-39-5

Mol F.

: C23H25ClN2O3

Mol W.

: 412.91

Cat No.

: SA34015

Impurities, Loratadine

Loratadine 2-Methyl Ester

$395.00 25 mg

In Stock

CAS No.

: 860010-37-3

Mol F.

: C24H25ClN2O4

Mol W.

: 440.92

Cat No.

: SA34029

Impurities, Loratadine

Loratadine 2-Nitrile

$155.00 25 mg

In Stock

CAS No.

: 860010-31-7

Mol F.

: C23H22ClN3O2

Mol W.

: 407.89

Cat No.

: SA34028

Impurities, Loratadine

Loratadine 4-Nitrile

$255.00 25 mg

In Stock

CAS No.

: 860010-33-9

Mol F.

: C23H22ClN3O2

Mol W.

: 407.89

Cat No.

: SA34030

Impurities, Loratadine

Loratadine 8-Bromo Impurity

$395.00 25 mg

In Stock

CAS No.

: 130642-60-3

Mol F.

: C22H23BrN2O2

Mol W.

: 427.33

Cat No.

: SA34018

Impurities, Loratadine

Loratadine Cyano Impurity

$95.00 25 mg

In Stock

CAS No.

: 31255-57-9

Mol F.

: C14H11ClN2

Mol W.

: 242.7

Cat No.

: SA34021

Impurities, Loratadine

Loratadine Deschloro Impurity

$185.00 25 mg

In Stock

CAS No.

: 79779-58-1

Mol F.

: C22H24N2O2

Mol W.

: 348.44

Cat No.

: SA34022

Impurities, Loratadine

Loratadine EP Impurity A

$95.00 25 mg

In Stock

CAS No.

: 133284-74-9

Mol F.

: C22H25ClN2O3

Mol W.

: 400.9

Cat No.

: SA34001

Impurities, Loratadine

Loratadine EP Impurity F

$185.00 25 mg

In Stock

CAS No.

: 125743-80-8

Mol F.

: C22H24ClFN2O2

Mol W.

: 402.89

Cat No.

: SA34006

Impurities, Loratadine

Loratadine EP Impurity H

$95.00 25 mg

In Stock

CAS No.

: 29976-53-2

Mol F.

: C8H13NO3

Mol W.

: 171.19

Cat No.

: SA34008

Impurities, Loratadine

Loratadine N-Formyl Impurity

$155.00 25 mg

In Stock

CAS No.

: 117810-61-4

Mol F.

: C20H19ClN2O

Mol W.

: 338.83

Cat No.

: SA34026

Impurities, Loratadine

Loratadine N-Oxide

$155.00 25 mg

In Stock

CAS No.

: 165739-62-8

Mol F.

: C22H23ClN2O3

Mol W.

: 398.88

Cat No.

: SA34013

Impurities, Lorcaserin

Lorcaserin EP Impurity B

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In Stock

CAS No.

: 953789-37-2

Mol F.

: C11H15Cl2N

Mol W.

: 232.15

Cat No.

: SA18804

Impurities, Losartan

Losartan Azide impurity

$155.00 25 mg

In Stock

CAS No.

: 727718-93-6

Mol F.

: C22H22ClN9

Mol W.

: 447.9

Cat No.

: SA26731

Impurities, Losartan

Losartan EP Impurity A

$95.00 25 mg

In Stock

CAS No.

: 79047-41-9

Mol F.

: C8H13ClN2O

Mol W.

: 188.65

Cat No.

: SA26701

Impurities, Losartan

Losartan EP Impurity B

$125.00 25 mg

In Stock

CAS No.

: 160514-13-6

Mol F.

: C14H12N4O

Mol W.

: 252.27

Cat No.

: SA26702

Impurities, Losartan

Losartan EP Impurity C

$295.00 25 mg

In Stock

CAS No.

: 114799-13-2(freeform);860644-28-6(potassiumsalt)

Mol F.

: C22H23ClN6O

Mol W.

: 422.91

Cat No.

: SA26703

Impurities, Losartan

Losartan EP Impurity F

$395.00 25 mg

In Stock

CAS No.

: 1332713-64-0

Mol F.

: C25H29ClN6O

Mol W.

: 464.99

Cat No.

: SA26706

Impurities, Losartan

Losartan EP Impurity J

$155.00 25 mg

In Stock

CAS No.

: 1006062-27-6

Mol F.

: C24H25ClN6O2

Mol W.

: 464.95

Cat No.

: SA26710

Impurities, Losartan

Losartan EP Impurity K

$185.00 25 mg

In Stock

CAS No.

: 114798-36-6

Mol F.

: C22H21ClN6O

Mol W.

: 420.89

Cat No.

: SA26711

Impurities, Losartan

Losartan EP Impurity L

$455.00 25 mg

In Stock

CAS No.

: 230971-71-8

Mol F.

: C44H44Cl2N12O

Mol W.

: 827.81

Cat No.

: SA26712

Impurities, Losartan

Losartan EP Impurity M

$455.00 25 mg

In Stock

CAS No.

: 230971-72-9

Mol F.

: C44H44Cl2N12O

Mol W.

: 827.81

Cat No.

: SA26713

Impurities, Loteprednol

Loteprednol

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In Stock

CAS No.

: 129260-79-3

Mol F.

: C21H27ClO5

Mol W.

: 394.89

Cat No.

: SA27606

Impurities, Loteprednol

Loteprednol Dimer

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C47H60O14

Mol W.

: 848.97

Cat No.

: SA27611

Impurities, Loteprednol

Loteprednol etabonate methyl ester

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C24H32O7

Mol W.

: 432.51

Cat No.

: SA27603

Ezetimibe, Impurities

M-Fluoro oxazolidone

$70.00 25 mg

In Stock

CAS No.

: 189028-93-1

Mol F.

: C20H18FNO4

Mol W.

: 355.36

Cat No.

: SA14831

Impurities, Timolol

Maleic acid

Please enquire for price & pack size

In Stock

CAS No.

: 110-16-7

Mol F.

: C4H4O4

Mol W.

: 116.07

Cat No.

: SA23224

Fluorometholone, Impurities

Medratriene Bromohydrin

Please enquire for price & pack size

In Stock

CAS No.

: 110664-58-9

Mol F.

: C22H29BrO4

Mol W.

: 437.37

Cat No.

: SA38414