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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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Desonide, Impurities

Desonide-21-aldehyde Hydrate

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Out of Stock

CAS No.

: NA

Mol F.

: C₂₄H₃₂O₇

Mol W.

: 432.51

Cat No.

: SA19004

Impurities, Palbociclib

Desoxo Palbociclib

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Out of Stock

CAS No.

: 2204863-06-7

Mol F.

: C24H29N7O

Mol W.

: 431.53

Cat No.

: SA40412

Impurities, Tenofovir

Desphenyl Tenofovir Alafenamide

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Out of Stock

CAS No.

: 376633-26-0

Mol F.

: C15H25N6O5P

Mol W.

: 400.38

Cat No.

: SA42407

Impurities, Rilpivirine

Despropenenitrile Bromo Rilpivirine

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Out of Stock

CAS No.

: 374067-85-3

Mol F.

: C19H16BrN5

Mol W.

: 394.27

Cat No.

: SA25401

Impurities, Sacubitril

Dessuccinyl Desethyl N-Boc Sacubitril Impurity | CAS : 1012341-50-2

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Out of Stock

CAS No.

: 1012341-50-2

Mol F.

: C23H29NO4

Mol W.

: 383.48

Cat No.

: SA40911

Dexamethasone, Impurities

Dexamethasone

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Out of Stock

CAS No.

: 50-02-2

Mol F.

: C₂₂H₂₉FO₅

Mol W.

: 392.46

Cat No.

: SA15501

Dexamethasone, Impurities

Dexamethasone 21-Propionate Impurity

$255.00 25 mg

Out of Stock

CAS No.

: 3793-10-0

Mol F.

: C25H33FO6

Mol W.

: 448.42

Cat No.

: SA15523

Dexamethasone, Impurities

Dexamethasone EP Impurity A

$1,595.00 25 mg

Out of Stock

CAS No.

Mol F.

: C22H29FO5

Mol W.

: 392.5

Cat No.

: SA15529

Dexamethasone, Impurities

Dexamethasone EP Impurity K

$1,995.00 25 mg

Out of Stock

CAS No.

: 1809224-82-5

Mol F.

: C22H26O4

Mol W.

: 354.44

Cat No.

: SA15511

Chlorpheniramine, Impurities

Dexchlorpheniramine EP Impurity A

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Out of Stock

CAS No.

: 132-20-7 (maleate salt); 86-21-5 (base)

Mol F.

: C16H20N2

Mol W.

: 240.34

Cat No.

: SA37606

Chlorpheniramine, Impurities

Dexchlorpheniramine EP Impurity B; (R)-Chlorpheniramine;

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Out of Stock

CAS No.

: 2188-09-3 (base); 23095-76-3 (maleate salt)

Mol F.

: C16H19ClN2

Mol W.

: 274.79

Cat No.

: SA37607

Chlorpheniramine, Impurities

Dexchlorpheniramine N-Oxide Dihydrochloride

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Out of Stock

CAS No.

: 12656-98-3

Mol F.

: C16H19ClN2O

Mol W.

: 290.79

Cat No.

: SA37605

Chlorpheniramine, Impurities

Dexchlorpheniramine; (S)-Chlorpheniramine

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Out of Stock

CAS No.

: 2438-32-6

Mol F.

: C16H19ClN2

Mol W.

: 274.79

Cat No.

: SA37608

Impurities, Solifenacin

Di-((3R)-1-Azabicyclo[2.2.2]oct-3-yl)carbonate

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Out of Stock

CAS No.

Mol F.

: C15H24N2O3

Mol W.

: 280.36

Cat No.

: SA32620

Ezetimibe, Impurities

Di-desfluoro Ezetimibe

$550.00 25 mg

Out of Stock

CAS No.

: 1251741-03-3

Mol F.

: C24H23NO3

Mol W.

: 373.44

Cat No.

: SA14845

Impurities, Neomycin

Di-N-Boc Neomycin Impurity 2

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Out of Stock

CAS No.

Mol F.

: C21H38N2O11

Mol W.

: 494.53

Cat No.

: SA51407

Impurities, Palbociclib

Di-tert-butyl 4,4′-(2-nitro pyridine-3,5-diyl)bis(piperazine-1-carboxylate)

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Out of Stock

CAS No.

Mol F.

: C23H36N6O6

Mol W.

: 492.58

Cat No.

: SA40435

Impurities, Palbociclib

Di-tert-butyl 4,4′-(diazene-1,2- diylbis(pyridine-6,3-diyl))(E)-bis(piperazine-1-carboxylate)

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Out of Stock

CAS No.

Mol F.

: C28H40N8O4

Mol W.

: 552.68

Cat No.

: SA40437

Brexpiprazole, Impurities

Di-tert-butyl piperazine-1,4-dicarboxylate

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Out of Stock

CAS No.

: 76535-75-6

Mol F.

: C14H26N2O4

Mol W.

: 286.37

Cat No.

: SA41332

Diacerein, Impurities

Diacerein

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Out of Stock

CAS No.

: 13739-02-1

Mol F.

: C19H12O8

Mol W.

: 368.29

Cat No.

: SA11000

Diacerein, Impurities

Diacerein EP Impurity A

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Out of Stock

CAS No.

: 518-82-1

Mol F.

: C₁₅H₁₀O₅

Mol W.

: 270.24

Cat No.

: SA11008

Diacerein, Impurities

Diacerein EP Impurity B

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Out of Stock

CAS No.

: 481-72-1

Mol F.

: C₁₅H₁₀O₅

Mol W.

: 270.24

Cat No.

: SA11004

Diacerein, Impurities

Diacerein EP Impurity C

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Out of Stock

CAS No.

: 478-43-3

Mol F.

: C₁₅H₈O₆

Mol W.

: 284.22

Cat No.

: SA11005

Diacerein, Impurities

Diacerein EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 875535-35-6

Mol F.

: C17H10O7

Mol W.

: 326.26

Cat No.

: SA11006

Diacerein, Impurities

Diacerein EP Impurity E

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Out of Stock

CAS No.

: 875535-36-7

Mol F.

: C₁₇H₁₀O₇

Mol W.

: 326.26

Cat No.

: SA11007

Clomipramine, Impurities

Dialkylated Impurity

$255.00 25 mg

Out of Stock

CAS No.

: 2305824-50-2; 2305824-51-3 (2HCl salt)

Mol F.

: C23H32ClN3

Mol W.

: 385.97

Cat No.

: SA33706

Impurities, Sitagliptin

Diamide Sitagliptin impurity

Please enquire for price & pack size

Out of Stock

CAS No.

Mol F.

: C20H19F6N5O3

Mol W.

: 491.39

Cat No.

: SA10420

Impurities, Varenicline

Diamine Varenicline

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Out of Stock

CAS No.

: 808120-35-6

Mol F.

: CH…Nƒ

Mol W.

: 189.26

Cat No.

: SA39509

Diazepam, Impurities

Diazepam

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Out of Stock

CAS No.

: 439-14-5

Mol F.

: C16H13ClN2O

Mol W.

: 284.7

Cat No.

: SA20500

Diazepam, Impurities

Diazepam dimer

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Out of Stock

CAS No.

: 3646-61-5

Mol F.

: C26H16Cl2N2

Mol W.

: 427.32

Cat No.

: SA20507

Diazepam, Impurities

Diazepam EP Impurity A

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Out of Stock

CAS No.

: 1088-11-5

Mol F.

: C15H11ClN2O

Mol W.

: 270.70999999999998

Cat No.

: SA20501

Diazepam, Impurities

Diazepam EP Impurity B

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Out of Stock

CAS No.

: 6021-21-2

Mol F.

: C₁₆H₁₃Cl₂NO₂

Mol W.

: 322.19

Cat No.

: SA20502

Diazepam, Impurities

Diazepam EP Impurity C

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Out of Stock

CAS No.

: 5220-02-0

Mol F.

: C16H13ClN2O

Mol W.

: 287.47000000000003

Cat No.

: SA20503

Diazepam, Impurities

Diazepam EP Impurity D

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Out of Stock

CAS No.

: 1022-13-5

Mol F.

: C14H12ClNO

Mol W.

: 245.7

Cat No.

: SA20504

Diazepam, Impurities

Diazepam EP Impurity E

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Out of Stock

CAS No.

: 20927-53-1

Mol F.

: C₁₅H₁₁ClN₂O

Mol W.

: 270.70999999999998

Cat No.

: SA20505

Diazepam, Impurities

Diazepam N-Oxide

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Out of Stock

CAS No.

: 2888-64-4

Mol F.

: C₁₆H₁₃ClN₂O₂

Mol W.

: 300.74

Cat No.

: SA20506

Baclofen, Impurities

Dibaclofen Urea

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C21H22Cl2N2O5

Mol W.

: 453.31

Cat No.

: SA28103

Baclofen, Impurities

Dibaclofen Urea Mono Lactum

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C21H20Cl2N2O4

Mol W.

: 435.3

Cat No.

: SA28109

Doxepin, Impurities

Dibenz[b,e]oxepin-Δ11(6H),α-acetaldehyde

Please enquire for price & pack size

Out of Stock

CAS No.

: 21324-99-2

Mol F.

: C16H12O2

Mol W.

: 236.26

Cat No.

: SA29910

Fosaprepitant, Impurities

Dibenzyl Phosphate impurity

$60.00 25 mg

Out of Stock

CAS No.

: 1623-08-1

Mol F.

: C14H15O4P

Mol W.

: 278.2

Cat No.

: SA45401

Baclofen, Impurities

Dichloro Baclofen

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Out of Stock

CAS No.

: 4846-95-1

Mol F.

: C10H11Cl2NO2

Mol W.

: 248.1

Cat No.

: SA28107

Diclofenac, Impurities

Diclofenac Aldehyde

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Out of Stock

CAS No.

: 22121-58-0

Mol F.

: C13H9Cl2NO2

Mol W.

: 266.12

Cat No.

: SA12704

Diclofenac, Impurities

Diclofenac Carboxylic Acid

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Out of Stock

CAS No.

: 13625-57-5

Mol F.

: C13H9Cl2NO2

Mol W.

: 282.12

Cat No.

: SA12705

Diclofenac, Impurities

Diclofenac Dimer Impurity

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Out of Stock

CAS No.

: 1609187-32-7

Mol F.

: C₂₈H₂₀Cl₄N₂O₄

Mol W.

: 590.2

Cat No.

: SA12712

Diclofenac, Impurities

Diclofenac EP Impurity D

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Out of Stock

CAS No.

: 127792-45-4

Mol F.

: C₁₄H₁₀BrClNNaO₂

Mol W.

: 362.58

Cat No.

: SA12711

Diclofenac, Impurities

Diclofenac Impurity C

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Out of Stock

CAS No.

: 27204-57-5

Mol F.

: C13H11Cl2NO

Mol W.

: 268.14

Cat No.

: SA12706

Diclofenac, Impurities

Diclofenac Sodium

Please enquire for price & pack size

Out of Stock

CAS No.

: 15307-79-6

Mol F.

: C14H10Cl2NNaO2

Mol W.

: 318.13

Cat No.

: SA12701

Impurities, Nebivolol

Didefluoro Nebivolol

Please enquire for price & pack size

Out of Stock

CAS No.

: 129101-33-3

Mol F.

: C22H27NO4

Mol W.

: 369.45

Cat No.

: SA14706

Impurities, Tolterodine

Didesisopropyl Tolterodine

Please enquire for price & pack size

Out of Stock

CAS No.

: 1189501-90-3

Mol F.

: C16H19NO

Mol W.

: 241.33

Cat No.

: SA28217

Cariprazine, Impurities

Didesmethyl 2,3-Dichlorophenyl Cariprazine

Please enquire for price & pack size

Out of Stock

CAS No.

: 839712-25-3(base); 1231947-92-4(HCl salt)

Mol F.

: C‰H‚ˆCl‚N„O

Mol W.

: 399.36

Cat No.

: SA39707