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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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Dolutegravir, Impurities

Dolutegravir enantiomer intermediate

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In Stock

CAS No.

: NA

Mol F.

: C14H16N2O6

Mol W.

: 308.29

Cat No.

: SA20230

Dolutegravir, Impurities

Dolutegravir Impurity A

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In Stock

CAS No.

: 2778347-47-8

Mol F.

: C22H23F2N3O5

Mol W.

: 447.43

Cat No.

: SA20231

Dolutegravir, Impurities

Dolutegravir Impurity C

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In Stock

CAS No.

: 1802141-49-6

Mol F.

: C22H23F2N3O5

Mol W.

: 447.43

Cat No.

: SA20232

Dolutegravir, Impurities

Dolutegravir isopropyl analouge

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In Stock

CAS No.

: NA

Mol F.

: C23H25F2N3O5

Mol W.

: 461.45

Cat No.

: SA20201

Dolutegravir, Impurities

Dolutegravir propyl analouge

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In Stock

CAS No.

: NA

Mol F.

: C23H25F2N3O5

Mol W.

: 461.45

Cat No.

: SA20202

Dorzolamide, Impurities

Doorzolamide Maleic Ester [(n-1)adduct]

$495.00 25 mg

In Stock

CAS No.

Mol F.

: C18H28N2O8S3

Mol W.

: 496.63

Cat No.

: SA24107

Dorzolamide, Impurities

Dorzolamide EP Impurity B

$350.00 25 mg

In Stock

CAS No.

: 120279-37-0

Mol F.

: C10H17ClN2O4S3

Mol W.

: 360.91

Cat No.

: SA24102

Dorzolamide, Impurities

Dorzolamide EP Impurity D

$295.00 25 mg

In Stock

CAS No.

: 154154-90-2 (base); 164455-27-0 (HCl salt)

Mol F.

: C8H12N2O4S3

Mol W.

: 332.85/296.4 (Free Base)

Cat No.

: SA24104

Dorzolamide, Impurities

Dorzolamide Maleic Acid Adduct

$355.00 25 mg

In Stock

CAS No.

Mol F.

: C14H20N2O8S3

Mol W.

: 440.51

Cat No.

: SA24100

Dorzolamide, Impurities

Dorzolamide N-Acetyl Analog

$125.00 25 mg

In Stock

CAS No.

: 147200-03-1

Mol F.

: C10H14N2O5S3

Mol W.

: 338.42

Cat No.

: SA24101

Doxepin, Impurities

Doxepin EP Impurity C

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In Stock

CAS No.

: 4504-96-5; 2887-91-4

Mol F.

: C18H19NO

Mol W.

: 265.35

Cat No.

: SA29903

Duloxetine, Impurities

Duloxetine

$100.00 25 mg

In Stock

CAS No.

: 116539-59-4(freebase);136434-34-9

Mol F.

: C18H19NOS

Mol W.

: 297.42

Cat No.

: SA36300

Duloxetine, Impurities

Duloxetine Dimethylaminopropanol Impurity

$80.00 25 mg

In Stock

CAS No.

: 132335-44-5

Mol F.

: C9H15NOS

Mol W.

: 185.29

Cat No.

: SA36309

Duloxetine, Impurities

Duloxetine EP Impurity B

$80.00 25 mg

In Stock

CAS No.

: 116539-55-0

Mol F.

: C8H13NOS

Mol W.

: 171.26

Cat No.

: SA36302

Duloxetine, Impurities

Duloxetine EP Impurity C

$140.00 25 mg

In Stock

CAS No.

: 953028-76-7

Mol F.

: C18H19NOS

Mol W.

: 297.42

Cat No.

: SA36303

Duloxetine, Impurities

Duloxetine EP Impurity D

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In Stock

CAS No.

: 90-15-3

Mol F.

: C10H8O

Mol W.

: 144.17

Cat No.

: SA36304

Duloxetine, Impurities

Duloxetine EP Impurity E

$250.00 25 mg

In Stock

CAS No.

: 1033803-59-6(base);1033719-36-6(HCl)

Mol F.

: C18H19NOS

Mol W.

: 297.42

Cat No.

: SA36305

Duloxetine, Impurities

Duloxetine EP Impurity F

$200.00 25 mg

In Stock

CAS No.

: 116817-28-8

Mol F.

: C18H19NOS

Mol W.

: 297.42

Cat No.

: SA36306

Duloxetine, Impurities

Duloxetine EP Impurity G

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In Stock

CAS No.

: 321-38-0

Mol F.

: C10H7F

Mol W.

: 146.16

Cat No.

: SA36307

Duloxetine, Impurities

Duloxetine N-Methyl

$80.00 25 mg

In Stock

CAS No.

: 132335-46-7(Freebase)132335-47-8(Oxalate)

Mol F.

: C19H21NOS

Mol W.

: 311.44

Cat No.

: SA36311

Duloxetine, Impurities

Duloxetine N-Methyl (R)-Isomer

$350.00 25 mg

In Stock

CAS No.

: 932013-45-1

Mol F.

: C19H21NOS

Mol W.

: 311.44

Cat No.

: SA36313

Duloxetine, Impurities

Duloxetine Phenyl Carbamate; (S)-Duloxetine Impurity A

$250.00 25 mg

In Stock

CAS No.

: 947686-09-1

Mol F.

: C‚…H‚ƒNOƒS

Mol W.

: 417.52

Cat No.

: SA36316

Dutasteride, Impurities

Dutasteride EP Impurity A

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In Stock

CAS No.

: 104239-97-6

Mol F.

: C19H27NO3

Mol W.

: 317.42

Cat No.

: SA35201

Dutasteride, Impurities

Dutasteride EP Impurity C

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In Stock

CAS No.

: 157307-36-3

Mol F.

: C21H31NO3

Mol W.

: 345.47

Cat No.

: SA35203

Edoxaban, Impurities

Edoxaban

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In Stock

CAS No.

: 480449-70-5

Mol F.

: C24H30ClN7O4S

Mol W.

: 548.06

Cat No.

: SA33000

Edoxaban, Impurities

Edoxaban Boc impurity

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In Stock

CAS No.

: 480452-36-6

Mol F.

: C21H30ClN5O5

Mol W.

: 467.9

Cat No.

: SA33032

Edoxaban, Impurities

Edoxaban Boc impurity 1

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In Stock

CAS No.

: 365997-36-0

Mol F.

: C15H27NO7S

Mol W.

: 365.4

Cat No.

: SA33010

Edoxaban, Impurities

Edoxaban Boc impurity 2

Please enquire for price & pack size

In Stock

CAS No.

: 365997-34-8

Mol F.

: C14H24N4O4

Mol W.

: 312.37

Cat No.

: SA33011

Edoxaban, Impurities

Edoxaban Boc impurity 3

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In Stock

CAS No.

: 480450-69-9

Mol F.

: C14H25N5O3

Mol W.

: 311.38

Cat No.

: SA33012

Edoxaban, Impurities

Edoxaban Bromo Impurity

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In Stock

CAS No.

: 775280-48-3

Mol F.

: C24H30BrN7O4S

Mol W.

: 592.5

Cat No.

: SA33031

Edoxaban, Impurities

Edoxaban Dipyridine Impurity

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In Stock

CAS No.

: 2568974-02-5

Mol F.

: C23H25Cl2N7O5

Mol W.

: 550.4

Cat No.

: SA33030

Edoxaban, Impurities

Edoxaban ethyl ester

Please enquire for price & pack size

In Stock

CAS No.

: 1093351-29-1

Mol F.

: C24H29ClN6O5S

Mol W.

: 549

Cat No.

: SA33047

Edoxaban, Impurities

Edoxaban Impurity D

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In Stock

CAS No.

: 767625-11-6 ; 480450-86-0 (Li salt)

Mol F.

: C19H27N5O5S

Mol W.

: 437.5

Cat No.

: SA33024

Edoxaban, Impurities

Edoxaban Methyl Impurity

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In Stock

CAS No.

Mol F.

: C25H33ClN7O4S

Mol W.

: 690.00

Cat No.

: SA33034

Edoxaban, Impurities

Edoxaban N-Oxide

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In Stock

CAS No.

: 2244103-96-4

Mol F.

: C24H30ClN7O5S

Mol W.

: 564.06

Cat No.

: SA33008

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

Edoxaben Cyclohexyl Methyl Ester Impurity

Please enquire for price & pack size

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

Please enquire for price & pack size

In Stock

CAS No.

: 164650-44-6

Mol F.

: C18H22F2N4O

Mol W.

: 348.39

Cat No.

: SA23605

Efinaconazole, Impurities

Efinaconazole Enantiomer

Please enquire for price & pack size

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 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