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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, Levothyroxine

Levothyroxine EP Impurity H

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Out of Stock

CAS No.

: 2055-97-2

Mol F.

: C13H6I4O4

Mol W.

: 733.8

Cat No.

: SA24710

Impurities, Levothyroxine

Levothyroxine EP Impurity I

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Out of Stock

CAS No.

: 2016-06-0

Mol F.

: C13H6I4O3

Mol W.

: 717.8

Cat No.

: SA24711

Impurities, Levothyroxine

Levothyroxine EP Impurity J

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Out of Stock

CAS No.

: 4604-41-5

Mol F.

: C15H13I2NO4

Mol W.

: 525.08000000000004

Cat No.

: SA24712

Impurities, Levothyroxine

Levothyroxine EP Impurity K

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Out of Stock

CAS No.

: 5817-39-0

Mol F.

: C15H12I3NO4

Mol W.

: 650.97

Cat No.

: SA24713

Impurities, Levothyroxine

Levothyroxine Ethyl Ester

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Out of Stock

CAS No.

: 76353-71-4

Mol F.

: C17H15I4NO4

Mol W.

: 804.92

Cat No.

: SA24714

Impurities, Levothyroxine

Levothyroxine Hydroxyphenoxy Aldehyde Impurity

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Out of Stock

CAS No.

: 2828-49-1

Mol F.

: C13H8I2O3

Mol W.

: 466.01

Cat No.

: SA24715

Impurities, Levothyroxine

Levothyroxine Methoxyphenoxy Aldehyde Impurity

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Out of Stock

CAS No.

: 69240-57-9

Mol F.

: C14H10I2O3

Mol W.

: 480.04

Cat No.

: SA24716

Impurities, Levothyroxine

Levothyroxine Methyl Ester

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Out of Stock

CAS No.

: 32180-11-3

Mol F.

: C16H13I4NO4

Mol W.

: 790.9

Cat No.

: SA24717

Impurities, Levothyroxine

Levothyroxine Monochloro Impurity

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Out of Stock

CAS No.

: 909279-46-5

Mol F.

: C15H11ClI3NO4

Mol W.

: 685.42

Cat No.

: SA24718

Impurities, Levothyroxine

Levothyroxine N-Formyl Impurity

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Out of Stock

CAS No.

: 671235-41-9

Mol F.

: C16H11I4NO5

Mol W.

: 804.88

Cat No.

: SA24719

Impurities, Levothyroxine

Levothyroxine O-Methyl Amine Impurity

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Out of Stock

CAS No.

: 2230724-39-5

Mol F.

: C15H13I4NO2

Mol W.

: 746.89

Cat No.

: SA24721

Impurities, Levothyroxine

Levothyroxine Sodium

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Out of Stock

CAS No.

: 55-03-8

Mol F.

: C15H20I4NNaO9

Mol W.

: 888.93

Cat No.

: SA24722

Impurities, Levothyroxine

Levothyroxine T4-Hydroxyacetic Acid Impurity

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Out of Stock

CAS No.

: 93647-48-4

Mol F.

: C14H8I4O5

Mol W.

: 763.83

Cat No.

: SA24723

Impurities, Linagliptin

Linagliptin

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Out of Stock

CAS No.

: 668270-12-0

Mol F.

: C25H28N8O2

Mol W.

: 472.54

Cat No.

: SA49933

Impurities, Linagliptin

Linagliptin 2-Chloromethyl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 109113-72-6

Mol F.

: C10H9ClN2

Mol W.

: 192.64

Cat No.

: SA49923

Impurities, Linagliptin

Linagliptin Diene Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 2463617-43-6

Mol F.

: C25H28N8O2

Mol W.

: 472.54

Cat No.

: SA49914

Impurities, Linagliptin

Linagliptin Dimer Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1418133-47-7

Mol F.

: C50H56N16O4

Mol W.

: 945.08

Cat No.

: SA49903

Impurities, Linagliptin

Linagliptin Dimer impurity (N-C-C-C Dimer)

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Out of Stock

CAS No.

: 2463617-49-2

Mol F.

: C51H56N16O4

Mol W.

: 957.1

Cat No.

: SA49908

Impurities, Linagliptin

Linagliptin Impurity 18

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Out of Stock

CAS No.

: 1646355-34-1

Mol F.

: C22H23N7O2

Mol W.

: 417.5

Cat No.

: SA49920

Impurities, Linagliptin

Linagliptin Impurity 21

Please enquire for price & pack size

Out of Stock

CAS No.

: 666816-91-7

Mol F.

: C20H28N6O4

Mol W.

: 416.47

Cat No.

: SA49944

Impurities, Linagliptin

Linagliptin Impurity 32

Please enquire for price & pack size

Out of Stock

CAS No.

: 853029-57-9

Mol F.

: C20H17BrN6O2

Mol W.

: 453.29

Cat No.

: SA49943

Impurities, Linagliptin

Linagliptin Impurity 44

Please enquire for price & pack size

Out of Stock

CAS No.

: 1791405-13-4

Mol F.

: C15H20N6O2

Mol W.

: 316.36

Cat No.

: SA49945

Impurities, Linagliptin

Linagliptin Impurity 55

Please enquire for price & pack size

Out of Stock

CAS No.

: 2436762-89-7

Mol F.

: C14H13BrN4O2

Mol W.

: 349.18

Cat No.

: SA49947

Impurities, Linagliptin

Linagliptin N,N`-Methylene Dimer

Please enquire for price & pack size

In Stock

CAS No.

: 2489212-72-6

Mol F.

: C51H56N16O4

Mol W.

: 957.12

Cat No.

: SA49948

Impurities, Linagliptin

Linagliptin Regio Isomer Di-Nitroso Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C25H26N10O4

Mol W.

: 530.54

Cat No.

: SA49953

Impurities, Linezolid

Linezolid

Please enquire for price & pack size

Out of Stock

CAS No.

: 165800-03-3

Mol F.

: C16H20FN3O4

Mol W.

: 337.35

Cat No.

: SA17501

Impurities, Linezolid

Linezolid Benzyl Ester Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 168828-81-7

Mol F.

: C18H19FN2O3

Mol W.

: 330.35

Cat No.

: SA17517

Impurities, Linezolid

Linezolid Dimer

Please enquire for price & pack size

Out of Stock

CAS No.

: 908143-04-4

Mol F.

: C₃₀H₃₅F₂N₅O₇

Mol W.

: 615.62

Cat No.

: SA17515

Impurities, Linezolid

Linezolid impurity -F

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C15H18FN3O5

Mol W.

: 339.32

Cat No.

: SA17525

Impurities, Linezolid

Linezolid Impurity A

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Out of Stock

CAS No.

Mol F.

: C14H16FN5O3

Mol W.

: 321.31

Cat No.

: SA17527

Impurities, Linezolid

Linezolid Impurity B

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Out of Stock

CAS No.

Mol F.

: C16H20FN3O3S

Mol W.

: 353.41

Cat No.

: SA17528

Impurities, Linezolid

Linezolid Impurity D

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Out of Stock

CAS No.

Mol F.

: C15H19FN2O6S

Mol W.

: 374.38

Cat No.

: SA17529

Impurities, Linezolid

Linezolid Impurity G

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Out of Stock

CAS No.

: 1391068-25-9; 333753-69-8(free base)

Mol F.

: C15H23ClFN3O3

Mol W.

: 347.81

Cat No.

: SA17526

Impurities, Linezolid

Linezolid Impurity H

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Out of Stock

CAS No.

Mol F.

: C15H22FN3O3

Mol W.

: 311.35

Cat No.

: SA17530

Impurities, Linezolid

Linezolid Mono Acid Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C22H22FN3O6

Mol W.

: 443.42

Cat No.

: SA17532

Impurities, Linezolid

Linezolid N-Oxide

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Out of Stock

CAS No.

: 189038-36-6

Mol F.

: C16H20FN3O5

Mol W.

: 353.35

Cat No.

: SA17524

Impurities, Lisinopril

Lisinopril

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Out of Stock

CAS No.

: 83915-83-7(dihydrate);76547-98-3(anhydrous)

Mol F.

: C21H31N3O5

Mol W.

: 405.49

Cat No.

: SA35700

Impurities, Lisinopril

Lisinopril (R,S,S)-Isomer

$495.00 25 mg

Out of Stock

CAS No.

: 85955-59-5;1356019-70-9(sodiumsalt)

Mol F.

: C21H31N3O5

Mol W.

: 405.49

Cat No.

: SA35705

Impurities, Lisinopril

Lisinopril Des-Proline Impurity

$355.00 25 mg

Out of Stock

CAS No.

: 138247-43-5

Mol F.

: C16H24N2O4

Mol W.

: 308.37

Cat No.

: SA35708

Impurities, Lisinopril

Lisinopril Dimer

$1,550.00 25 mg

Out of Stock

CAS No.

: 1356839-89-8

Mol F.

: C42H60N6O9

Mol W.

: 792.96

Cat No.

: SA35707

Impurities, Lisinopril

Lisinopril EP Impurity A

$80.00 25 mg

Out of Stock

CAS No.

: 1012-05-1

Mol F.

: C10H13NO2

Mol W.

: 179.22

Cat No.

: SA35701

Impurities, Lisinopril

Lisinopril EP Impurity B

$80.00 25 mg

Out of Stock

CAS No.

: 6192-52-5

Mol F.

: C7H8O3S

Mol W.

: 172.2

Cat No.

: SA35702

Impurities, Lisinopril

Lisinopril EP Impurity I

$555.00 25 mg

Out of Stock

CAS No.

: 927819-64-5

Mol F.

: C31H41N3O7

Mol W.

: 567.67

Cat No.

: SA35709

Impurities, Lisinopril

Lisinopril Mono Methyester Impurity

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Out of Stock

CAS No.

: NA

Mol F.

: C22H33N3O5

Mol W.

: 419.51

Cat No.

: SA35711

Impurities, Lisinopril

Lisinopril Pyrrolidine Methyl Ester Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C22H33N3O5

Mol W.

: 419.51

Cat No.

: SA35710

Impurities, Loratadine

Loratadine

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Out of Stock

CAS No.

: 79794-75-5

Mol F.

: C22H23ClN2O2

Mol W.

: 382.88

Cat No.

: SA34000

Impurities, Loratadine

Loratadine 2-Chloro Impurity

$395.00 25 mg

Out of Stock

CAS No.

: 165739-64-0

Mol F.

: C22H22Cl2N2O2

Mol W.

: 417.33

Cat No.

: SA34014

Impurities, Loratadine

Loratadine 3-Hydroxy Impurity

$395.00 25 mg

Out of Stock

CAS No.

: 183483-15-0

Mol F.

: C22H23ClN2O3

Mol W.

: 398.88

Cat No.

: SA34016

Impurities, Loratadine

Loratadine 4-Hydroxymethyl Impurity

$595.00 25 mg

Out of Stock

CAS No.

: 609806-40-8

Mol F.

: C23H25ClN2O3

Mol W.

: 412.91

Cat No.

: SA34017

Impurities, Loratadine

Loratadine 8-Dechloro-10-Chloro Impurity

$795.00 25 mg

Out of Stock

CAS No.

: 1346605-16-0

Mol F.

: C22H23ClN2O2

Mol W.

: 382.88

Cat No.

: SA34019