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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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Edoxaban, Impurities

Edoxaban Pyridine Ethyl Ester Impurity

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In Stock

CAS No.

: 1243308-37-3

Mol F.

: C9H10Cl2N2O3

Mol W.

: 265.09

Cat No.

: SA33016

Edoxaban, Impurities

Edoxaban Thiazole acid impurity

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In Stock

CAS No.

: 1255529-38-4

Mol F.

: C21H30ClN5O5

Mol W.

: 234.7

Cat No.

: SA33041

Edoxaban, Impurities

Edoxaban Thiazole impurity 2

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In Stock

CAS No.

: 852291-41-9

Mol F.

: C7H12BrN3S

Mol W.

: 250.16

Cat No.

: SA33013

Edoxaban, Impurities

Edoxaben Cyclohexyl Methyl Ester Impurity

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In Stock

CAS No.

Mol F.

: C23H27ClN6O5S

Mol W.

: 535.00

Cat No.

: SA33033

Efavirenz, Impurities

Efavirenz amino alcohol ethyl carbamate

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In Stock

CAS No.

: 211563-41-6

Mol F.

: C16H15ClF3NO3

Mol W.

: 361.07

Cat No.

: SA17619

Efavirenz, Impurities

Efavirenz Pentyne Analog

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In Stock

CAS No.

: 205755-86-8

Mol F.

: C14H11ClF3NO2

Mol W.

: 317.69

Cat No.

: SA17614

Efavirenz, Impurities

Efavirenz USP Related Compound A

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In Stock

CAS No.

: 209414-27-7

Mol F.

: C13H11ClF3NO

Mol W.

: 289.68

Cat No.

: SA17607

Efinaconazole, Impurities

Efinaconazole

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In Stock

CAS No.

: 164650-44-6

Mol F.

: C18H22F2N4O

Mol W.

: 348.39

Cat No.

: SA23605

Efinaconazole, Impurities

Efinaconazole Enantiomer

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In Stock

CAS No.

: 164650-45-7

Mol F.

: C18H22F2N4O

Mol W.

: 348.39

Cat No.

: SA23603

Efinaconazole, Impurities

Efinaconazole-N-oxide

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In Stock

CAS No.

: 2055038-63-4

Mol F.

: C18H22F2N4O2

Mol W.

: 364.39

Cat No.

: SA23604

Empagliflozin, Impurities

Empagliflozin (tetrahydrofuran-3-yl)oxy Ortho Isomer | CAS No: 2452301-30-1

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In Stock

CAS No.

: 2452301-30-1

Mol F.

: C23H27ClO7

Mol W.

: 450.9

Cat No.

: SA15157

Empagliflozin, Impurities

Empagliflozin 2S,3R,4S,5R,6R-6-(acetoxymethyl-2-(4-chloro-3-(4-(((S)-tetrahydrofuran-3-yl)oxy)benzyl)phenyl)-2-hydroxytetrahydro-2H-pyran-3,4,5-triyl triacetate

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In Stock

CAS No.

: 2262435-19-6

Mol F.

: C31H35ClO12

Mol W.

: 635.06

Cat No.

: SA15146

Empagliflozin, Impurities

Empagliflozin 5-Bromo Hydroxy Analog

$199.00 10 mg

In Stock

CAS No.

: 1800196-43-3

Mol F.

: C17H16BrClO3

Mol W.

: 383.66

Cat No.

: SA15121

Empagliflozin, Impurities

Empagliflozin 5-Bromo Keto Analog

$199.00 10 mg

In Stock

CAS No.

: 915095-84-0

Mol F.

: C17H14BrClO3

Mol W.

: 381.65

Cat No.

: SA15120

Empagliflozin, Impurities

Empagliflozin Acetyl impurity

$205.00 25 mg

In Stock

CAS No.

: 1079083-63-8

Mol F.

: C27H29ClO10

Mol W.

: 548.97

Cat No.

: SA15126

Empagliflozin, Impurities

Empagliflozin bromo impurity

$225.00 10 mg

In Stock

CAS No.

Mol F.

: C23H27BrO7

Mol W.

: 495.36

Cat No.

: SA15138

Empagliflozin, Impurities

Empagliflozin CIBPTF

$180.00 25 mg

In Stock

CAS No.

: 915095-94-2

Mol F.

: C17H16BrClO2

Mol W.

: 367.66

Cat No.

: SA15124

Empagliflozin, Impurities

Empagliflozin Dimer

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In Stock

CAS No.

Mol F.

: C47H54Cl2O14

Mol W.

: 913.83

Cat No.

: SA15155

Empagliflozin, Impurities

Empagliflozin Enantiomer Impurity

$325.00 5 mg

In Stock

CAS No.

Mol F.

: C23H27ClO7

Mol W.

: 450.91

Cat No.

: SA15135

Empagliflozin, Impurities

Empagliflozin Furanose alpha Isomer

$355.00 10 mg

In Stock

CAS No.

Mol F.

: C23H27ClO7

Mol W.

: 450.91

Cat No.

: SA15122

Empagliflozin, Impurities

Empagliflozin Furanose Beta Isomer

$135.00 10 mg

In Stock

CAS No.

: 1620758-32-8

Mol F.

: C23H27ClO7

Mol W.

: 450.9

Cat No.

: SA15123

Empagliflozin, Impurities

Empagliflozin Impurity 6

$159.00 10 mg

In Stock

CAS No.

: 1620758-21-5

Mol F.

: C32H37ClO12

Mol W.

: 649.1

Cat No.

: SA15125

Empagliflozin, Impurities

Empagliflozin Impurity 86

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C19H18ClFO6

Mol W.

: 396.79

Cat No.

: SA15151

Empagliflozin, Impurities

Empagliflozin L-Glucono Diastereomer

$245.00 5 mg

In Stock

CAS No.

Mol F.

: C23H27ClO7

Mol W.

: 450.9

Cat No.

: SA15131

Empagliflozin, Impurities

Empagliflozin Monoacetyl Impurity

$135.00 25 mg

In Stock

CAS No.

Mol F.

: C25H29ClO8

Mol W.

: 492.94

Cat No.

: SA15118

Empagliflozin, Impurities

Empagliflozin R/S-Furanose

$258.00 25 mg

In Stock

CAS No.

: 1620758-31-7+1620758-32-8

Mol F.

: C23H27ClO7

Mol W.

: 450.91

Cat No.

: SA15104

Empagliflozin, Impurities

Empagliflozin Silyl Impurity

$205.00 25 mg

In Stock

CAS No.

: 2819995-58-7

Mol F.

: C20H25ClO2Si

Mol W.

: 360.95

Cat No.

: SA15119

Empagliflozin, Impurities

Empagliflozin α-Anomer

$330.00 10 mg

In Stock

CAS No.

: 1620758-33-9

Mol F.

: C23H27ClO7

Mol W.

: 450.91

Cat No.

: SA15105

Emtricitabine, Impurities

Emtricitabine (R)-Sulphoxide Oxide

$165.00 10 mg

In Stock

CAS No.

: 2101981-64-8

Mol F.

: C8H10FN3O4S

Mol W.

: 263.25

Cat No.

: SA22926

Emtricitabine, Impurities

Emtricitabine (S)-Sulphoxide Oxide

$145.00 10 mg

In Stock

CAS No.

: 1160303-44-5

Mol F.

: C8H10FN3O4S

Mol W.

: 263.25

Cat No.

: SA22925

Emtricitabine, Impurities

Emtricitabine cis-Cyclic Impurity

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In Stock

CAS No.

Mol F.

: C8H9FN2O4S

Mol W.

: 248.23

Cat No.

: SA22924

Emtricitabine, Impurities

Emtricitabine Menthyl Ester

$85.00 25 mg

In Stock

CAS No.

: 764659-72-5

Mol F.

: C18H26FN3O4S

Mol W.

: 399.48

Cat No.

: SA22904

Emtricitabine, Impurities

Emtricitabine Sulphoxide Impurity

$175.00 25 mg

In Stock

CAS No.

: 152128-77-3

Mol F.

: C8H10FN3O4S

Mol W.

: 263.25

Cat No.

: SA22923

Emtricitabine, Impurities

Emtricitabine trans-Cyclic Impurity

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In Stock

CAS No.

Mol F.

: C8H9FN2O4S

Mol W.

: 248.23

Cat No.

: SA22900

ENALAPRIL, Impurities

Enalapril EP Impurity H | CAS : 2055735-10-7

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In Stock

CAS No.

: 2055735-10-7

Mol F.

: C20H34N2O5

Mol W.

: 382.49

Cat No.

: SA44000

Emtricitabine, Impurities

ent-Emtricitabine; Emtricitabine IP Impurity D

$445.00 25 mg

In Stock

CAS No.

: 137530-41-7

Mol F.

: C₈H₁₀FN₃O₃S

Mol W.

: 247.25

Cat No.

: SA22906

Ezetimibe

ent-Ezetimibe; RSR-Ezetimibe

$350.00 25 mg

In Stock

CAS No.

: 1376614-99-1

Mol F.

: C24H21F2NO3

Mol W.

: 409.43

Cat No.

: SA14812

Impurities, Lamivudine

ent-Lamivudine; Lamivudine EP Impurity D

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In Stock

CAS No.

: 134680-32-3

Mol F.

: C8H11N3O3S

Mol W.

: 229.26

Cat No.

: SA22307

Impurities, Rosuvastatin

ent-Rosuvastatin tert-Butyl Ester

$550.00 25 mg

In Stock

CAS No.

: 615263-60-0

Mol F.

: C26H36FN3O6S

Mol W.

: 537.64

Cat No.

: SA12149

Entacapone, Impurities

Entacapone EP Impurity B

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In Stock

CAS No.

: 1215039-66-9

Mol F.

: C12H10N2O6

Mol W.

: 278.22000000000003

Cat No.

: SA26902

Erlotinib, Impurities

Erlotinib 6-O-Chloroethyl Analog

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In Stock

CAS No.

: 183320-04-9

Mol F.

: C21H21Cl2N3O3

Mol W.

: 434.32

Cat No.

: SA25202

Erlotinib, Impurities

Erlotinib Chloro Impurity

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In Stock

CAS No.

: 183322-18-1

Mol F.

: C14H17ClN2O4

Mol W.

: 312.75

Cat No.

: SA25207

Erlotinib, Impurities

Erlotinib Hydrochloride

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In Stock

CAS No.

: 183319-69-9

Mol F.

: C22H24ClN3O4

Mol W.

: 429.9

Cat No.

: SA25209

Erlotinib, Impurities

Erlotinib imp 3, Erlotinib N-3-bromophenyl Analog

Please enquire for price & pack size

In Stock

CAS No.

: 328528-74-1

Mol F.

: C20H22BrN3O4

Mol W.

: 448.31

Cat No.

: SA25212

Erlotinib, Impurities

Erlotinib impurity H

Please enquire for price & pack size

In Stock

CAS No.

: 183321-85-9

Mol F.

: C21H20ClN3O3

Mol W.

: 397.85

Cat No.

: SA25227

Erlotinib, Impurities

Erlotinib Impurity L

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In Stock

CAS No.

: 183321-82-6

Mol F.

: C20H17Cl2N3O2

Mol W.

: 402.28

Cat No.

: SA25218

Erlotinib, Impurities

Erlotinib Impurity M

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In Stock

CAS No.

: 183322-21-6

Mol F.

: C12H11Cl3N2O2

Mol W.

: 321.6

Cat No.

: SA25220

Erlotinib, Impurities

Erlotinib Isopropyl ether

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C17H24N2O5

Mol W.

: 336.38

Cat No.

: SA25211

Erlotinib, Impurities

Erlotinib Lactam Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 179688-29-0

Mol F.

: C14H18N2O5

Mol W.

: 294.3

Cat No.

: SA25210

Erlotinib, Impurities

Erlotinibe API (Free Base)

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In Stock

CAS No.

: 183321-74-6

Mol F.

: C22H23N3O4

Mol W.

: 393.44

Cat No.

: SA25229