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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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Atomoxetine, Impurities

Atomoxetine HCl

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Out of Stock

CAS No.

: 82248-59-7

Mol F.

: C17H22ClNO

Mol W.

: 291.82

Cat No.

: SA22112

Atomoxetine, Impurities

Atomoxetine HCl Racemate

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Out of Stock

CAS No.

: 82857-40-7

Mol F.

: C17H22ClNO

Mol W.

: 291.82

Cat No.

: SA22113

Atomoxetine, Impurities

Atomoxetine m-Methyl Racemate

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Out of Stock

CAS No.

: 873310-29-3(FreeBase)

Mol F.

: C17H22ClNO

Mol W.

: 291.82

Cat No.

: SA22114

Atomoxetine, Impurities

Atomoxetine N-Desmethyl Impurity

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Out of Stock

CAS No.

: 881995-46-6

Mol F.

: C16H20ClNO

Mol W.

: 277.79

Cat No.

: SA22115

Atorvastatin, Impurities

Atorvastatin (3S,5R)-Isomer Methyl Ester

$500.00 50 mg

Out of Stock

CAS No.

: 1429437-85-3

Mol F.

: C34H37FN2O5

Mol W.

: 572.67

Cat No.

: SA17819

Atorvastatin, Impurities

Atorvastatin 2-Hydroxy

$2,500.00 100 mg

Out of Stock

CAS No.

: 214217-86-4 (acid); 265989-46-6 (Salt)

Mol F.

: C33H35FN2O6

Mol W.

: 574.64

Cat No.

: SA17821

Atorvastatin, Impurities

Atorvastatin 3-Oxo Acid

$2,100.00 100 mg

Out of Stock

CAS No.

: 1391052-00-8 (Salt)

Mol F.

: C33H33FN2O5

Mol W.

: 556.62

Cat No.

: SA17822

Atorvastatin, Impurities

Atorvastatin 3-Oxopropyl Impurity

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Out of Stock

CAS No.

: 110862-46-9

Mol F.

: C29H27FN2O2

Mol W.

: 454.54

Cat No.

: SA17823

Atorvastatin, Impurities

Atorvastatin EP Impurity B

$450.00 25 mg

Out of Stock

CAS No.

: 842103-12-2

Mol F.

: C33H35N2O5

Mol W.

: 558.64

Cat No.

: SA17810

Atorvastatin, Impurities

Atorvastatin EP Impurity D

$450.00 25 mg

Out of Stock

CAS No.

: 148146-51-4

Mol F.

: C26H22FNO4

Mol W.

: 431.46

Cat No.

: SA17812

Atropine, Impurities

Atropine

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Out of Stock

CAS No.

: 51-55-8

Mol F.

: C17H23NO3

Mol W.

: 289.37

Cat No.

: SA47700

Atropine, Impurities

Atropine EP Impurity C

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Out of Stock

CAS No.

: 552-63-6

Mol F.

: C9H10O3

Mol W.

: 166.17

Cat No.

: SA47703

Atropine, Impurities

Atropine EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 55869-99-3; 55449-49-5 (HBr)

Mol F.

: C17H23NO4

Mol W.

: 305.37

Cat No.

: SA47704

Atropine, Impurities

Atropine EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 949092-65-3

Mol F.

: C17H23NO4

Mol W.

: 305.37

Cat No.

: SA47705

Atropine, Impurities

Atropine EP Impurity F (HBr Trihydrate)

Please enquire for price & pack size

Out of Stock

CAS No.

: 6533-68-2

Mol F.

: C17H28BrNO7

Mol W.

: 438.31

Cat No.

: SA47706

Atropine, Impurities

Atropine EP Impurity G

Please enquire for price & pack size

Out of Stock

CAS No.

: 21956-47-8 (Base)

Mol F.

: C17H23NO3

Mol W.

: 289.37

Cat No.

: SA47707

Avatrombopag, Impurities

Avatrombopag 5-Chloro Acid Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C29H34Cl2N6O3S2

Mol W.

: 649.70000000000005

Cat No.

: SA43906

Avatrombopag, Impurities

Avatrombopag Bromo Acid Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C29H33BrCl2N6O3S2

Mol W.

: 728.5

Cat No.

: SA43903

Avatrombopag, Impurities

Avatrombopag Di Acid Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 958457-83-5

Mol F.

: C12H13ClN2O4

Mol W.

: 284.7

Cat No.

: SA43902

Avatrombopag, Impurities

Avatrombopag Diamide Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C46H55Cl3N10O2S4

Mol W.

: 1014.6

Cat No.

: SA43905

Avatrombopag, Impurities

Avatrombopag Ester Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C31H38Cl2N6O3S2 : C3H7NO

Mol W.

Cat No.

: SA43904

Avatrombopag, Impurities

Avatrombopag Maleate

Please enquire for price & pack size

Out of Stock

CAS No.

: 677007-74-8

Mol F.

: C29H34Cl2N6O3S2 : C4H4O4

Mol W.

: 649.7 116.1

Cat No.

: SA43901

Axitinib, Impurities

Axitinib Asymmetric Dimer Impurity | CAS : 1428728-84-0

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Out of Stock

CAS No.

: 1428728-84-0

Mol F.

: C44H36N8O2S2

Mol W.

: 773.0

Cat No.

: SA52216

Axitinib, Impurities

Axitinib Cyclobutane Dimer Impurity | CAS : 1428728-83-9

Please enquire for price & pack size

Out of Stock

CAS No.

: 1428728-83-9

Mol F.

: C44H36N8O2S2

Mol W.

: 773.0

Cat No.

: SA52217

Azacitidine, Impurities

Azacitidine

Please enquire for price & pack size

Out of Stock

CAS No.

: 320-67-2

Mol F.

: C₈H₁₂N₄O₅

Mol W.

: 244.2

Cat No.

: SA37500

Azacitidine, Impurities

Azacitidine Dicarbamide Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 108-19-0

Mol F.

: C2H5N3O2

Mol W.

: 103.08

Cat No.

: SA37508

Azacitidine, Impurities

Azacitidine Formyl Amidine Analog

Please enquire for price & pack size

Out of Stock

CAS No.

: 65126-88-7

Mol F.

: C8H14N4O6

Mol W.

: 262.22

Cat No.

: SA37504

Azacitidine, Impurities

Azacitidine Related Compound C Isomer-4

Please enquire for price & pack size

Out of Stock

CAS No.

: 1698011-17-4

Mol F.

: C7H14N4O5

Mol W.

: 234.2

Cat No.

: SA37510

Azathioprine, Impurities

Azathioprine

Please enquire for price & pack size

Out of Stock

CAS No.

: 446-86-6

Mol F.

: C9H7N7O2S

Mol W.

: 277.26

Cat No.

: SA17900

Azathioprine, Impurities

Azathioprine EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 4897-25-0

Mol F.

: C4H4ClN3O2

Mol W.

: 161.55

Cat No.

: SA17904

Azathioprine, Impurities

Azathioprine EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 6339-54-4

Mol F.

: C₄H₅N₃O₂S

Mol W.

: 159.17

Cat No.

: SA17905

Azathioprine, Impurities

Azathioprine EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 73703-74-9 (free base); 35681-68-6(sodium salt)

Mol F.

: C4H4N3NaO3

Mol W.

: 165.08

Cat No.

: SA17906

Azathioprine, Impurities

Azathioprine EP Impurity F

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Out of Stock

CAS No.

: 68-94-0

Mol F.

: C5H4N4O

Mol W.

: 136.11

Cat No.

: SA17907

Aminocaproic Acid, Impurities

Azepan-2-one

Please enquire for price & pack size

Out of Stock

CAS No.

: 105-60-2

Mol F.

: C6H11NO

Mol W.

: 113.16

Cat No.

: SA22611

Azithromycin, Impurities

Azithromycin

Please enquire for price & pack size

Out of Stock

CAS No.

: 117772-70-0

Mol F.

: C38H76N2O14

Mol W.

: 785.02

Cat No.

: SA10300

Azithromycin, Impurities

Azithromycin EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 76801-85-9

Mol F.

: C37H70N2O12

Mol W.

: 734.96

Cat No.

: SA10309

Azithromycin, Impurities

Azithromycin EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 307974-61-4

Mol F.

: C38H72N2O11

Mol W.

: 732.99

Cat No.

: SA10310

Azithromycin, Impurities

Azithromycin EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 620169-47-3

Mol F.

: C37H70N2O12

Mol W.

: 734.96

Cat No.

: SA10311

Azithromycin, Impurities

Azithromycin EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 612069-26-8

Mol F.

: C38H72N2O13

Mol W.

: 764.98

Cat No.

: SA10312

Azithromycin, Impurities

Azithromycin EP Impurity K

Please enquire for price & pack size

Out of Stock

CAS No.

: 612534-95-9

Mol F.

: C38H70N2O13

Mol W.

: 762.97

Cat No.

: SA10315

Azithromycin, Impurities

Azithromycin EP Impurity O

Please enquire for price & pack size

Out of Stock

CAS No.

: 763924-54-5

Mol F.

: C39H74N2O12

Mol W.

: 763.01

Cat No.

: SA10308

Azithromycin, Impurities

Azithromycin Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 612069-27-9

Mol F.

: C36H68N2O12

Mol W.

: 720.93

Cat No.

: SA10301

Azithromycin, Impurities

Azithromycin Impurity F

Please enquire for price & pack size

Out of Stock

CAS No.

: 612069-28-0

Mol F.

: C38H70N2O13

Mol W.

: 762.97

Cat No.

: SA10302

Azithromycin, Impurities

Azithromycin Impurity L

Please enquire for price & pack size

Out of Stock

CAS No.

: 90503-06-3

Mol F.

: C38H72N2O13

Mol W.

: 764.98

Cat No.

: SA10305

Azithromycin, Impurities

Azithromycin Impurity M

Please enquire for price & pack size

Out of Stock

CAS No.

: 765927-71-7

Mol F.

: C37H68N2O13

Mol W.

: 748.94

Cat No.

: SA10306

Azithromycin, Impurities

Azithromycin Impurity N

Please enquire for price & pack size

Out of Stock

CAS No.

: 612069-25-7

Mol F.

: C36H65NO13

Mol W.

: 719.9

Cat No.

: SA10307

Baclofen, Impurities

Baclofen Butylester

Please enquire for price & pack size

Out of Stock

CAS No.

: 114661-63-1; 947583-11-1 (HCl salt)

Mol F.

: C14H20ClNO2

Mol W.

: 269.77

Cat No.

: SA28108

Baclofen, Impurities

Baclofen EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 22518-27-0

Mol F.

: C10H10ClNO

Mol W.

: 195.64

Cat No.

: SA28100

Baclofen, Impurities

Baclofen EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 1141-23-7

Mol F.

: C11H12ClNO3

Mol W.

: 241.67

Cat No.

: SA28101

Beclomethasone Dipropionate, Impurities

Beclomethasone Dipropionate

Please enquire for price & pack size

Out of Stock

CAS No.

: 5534-09-8

Mol F.

: C28H37ClO7

Mol W.

: 521.06

Cat No.

: SA15601