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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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Impurities, Rosuvastatin

Rosuvastatin 2-fluorophenyl Impurity

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CAS No.

: NA

Mol F.

: C22H28FN3O6S

Mol W.

: 481.54

Cat No.

: SA121138

Impurities, Rosuvastatin

Rosuvastatin 2,3-Anhydro Acid Ethyl Ester

$455.00 50 mg

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CAS No.

: 2452383-23-0

Mol F.

: C24H30FN3O5S

Mol W.

: 491.59

Cat No.

: SA12184

Impurities, Rosuvastatin

Rosuvastatin 2,3,4,5-Dianhydro Acid Ethyl Ester

$1,995.00 100 mg

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CAS No.

Mol F.

: C24H28FN3O4S

Mol W.

: 473.17

Cat No.

: SA12183

Impurities, Rosuvastatin

Rosuvastatin 3-fluorophenyl Impurity

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CAS No.

: NA

Mol F.

: C22H28FN3O6S

Mol W.

: 481.54

Cat No.

: SA121139

Impurities, Rosuvastatin

Rosuvastatin 3-Oxo Acid Ethyl Ester

$1,195.00 50 mg

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CAS No.

: 901765-36-4

Mol F.

: C24H30FN3O6S

Mol W.

: 507.57

Cat No.

: SA12185

Impurities, Rosuvastatin

Rosuvastatin 3-Oxo Acid Sodium Salt

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CAS No.

: 1346747-49-6

Mol F.

: C22H25FN3NaO6S

Mol W.

: 501.51

Cat No.

: SA12146

Impurities, Rosuvastatin

Rosuvastatin 4,5-Anhydro Acid Calcium Salt

$1,550.00 25 mg

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CAS No.

: 1346606-44-7(Acid)

Mol F.

: C22H25FN3O5S.1/2Ca

Mol W.

: 482.51

Cat No.

: SA12124

Impurities, Rosuvastatin

Rosuvastatin 5-Oxo Acid Ethyl Ester

$455.00 50 mg

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CAS No.

: 1863898-67-2

Mol F.

: C24H30FN3O6OS

Mol W.

: 507.57

Cat No.

: SA12186

Impurities, Rosuvastatin

Rosuvastatin acetonide N,N’-dimethy amide

$450.00 25 mg

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CAS No.

Mol F.

: C27H37FN4O5S

Mol W.

: 548.67

Cat No.

: SA12199

Impurities, Rosuvastatin

Rosuvastatin Allyl Ester

$150.00 25 mg

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CAS No.

: 1352945-05-1

Mol F.

: C25H32FN3O6S

Mol W.

: 521.6

Cat No.

: SA12114

Impurities, Rosuvastatin

Rosuvastatin Calcium Salt

$100.00 25 mg

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CAS No.

: 147098-20-2

Mol F.

: C22H27FN3O6S.1/2Ca

Mol W.

: 500.57

Cat No.

: SA12113

Impurities, Rosuvastatin

Rosuvastatin Chloro 3-oxohexanoic Acid Impurity

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CAS No.

: 587855-03-6

Mol F.

: C6H9ClO4

Mol W.

: 180.6

Cat No.

: SA121136

Impurities, Rosuvastatin

Rosuvastatin Chloro-3,5-dihydroxyhexanoic Acid Impurity

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CAS No.

: 958358-67-3

Mol F.

: C6H11ClO4

Mol W.

: 182.6

Cat No.

: SA121137

Impurities, Rosuvastatin

Rosuvastatin D-5 Diastereomer Impurity

$200.00 25 mg

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CAS No.

: 1025085-36-2

Mol F.

: C15H26O6

Mol W.

: 302.36

Cat No.

: SA121104

Rosuvastatin

Rosuvastatin Desfluoride Impurity (RRT 0.87)

$555.00 1 g

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CAS No.

: 868755-01-5

Mol F.

: C15H18N2O3

Mol W.

: 274.32

Cat No.

: SA121135

Impurities, Rosuvastatin

Rosuvastatin Dibromomethyl Impurity

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CAS No.

: 1416000-51-5

Mol F.

: C16H18Br2FN3O2S

Mol W.

: 495.20

Cat No.

: SA121140

Impurities, Rosuvastatin

Rosuvastatin EP Impurity A T-Butyl Ester

$450.00 25 mg

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CAS No.

: 1714147-49-5

Mol F.

: C29H42FN3O7S

Mol W.

: 595.72

Cat No.

: SA12137

Rosuvastatin

Rosuvastatin EP Impurity N

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CAS No.

: 2290571-51-4

Mol F.

: C22H26FN3O5S

Mol W.

: 463.52

Cat No.

: SA121117

Impurities, Rosuvastatin

Rosuvastatin Impurity SA12159

$350.00 25 mg

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CAS No.

Mol F.

: C22H26FN3O5S

Mol W.

: 463.52

Cat No.

: SA12159

Rosuvastatin

Rosuvastatin impurity-9

$995.00 500 mg

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CAS No.

: 2095786-11-9

Mol F.

: C13H22O6

Mol W.

: 274.31

Cat No.

: SA121109

Impurities, Rosuvastatin

Rosuvastatin Sodium (3S,5S)-Isomer

$950.00 25 mg

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CAS No.

Mol F.

: C22H27FN3NaO6S

Mol W.

: 503.52

Cat No.

: SA12178

Impurities, Rosuvastatin

Rosuvastatin tert-Butyl Ester

$750.00 25 mg

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CAS No.

: 1283766-30-2

Mol F.

: C24H34FN3O6S

Mol W.

: 523.62

Cat No.

: SA12120

Impurities, Rosuvastatin

Rosuvastatin Triphenylphosphonium Bromide

$80.00 25 mg

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CAS No.

: 885477-83-8

Mol F.

: C34H34BrFN3O2PS

Mol W.

: 678.59

Cat No.

: SA12118

Edoxaban, Impurities

RSR Boc-Cyclohexyl Diastereomer of Edoxaban

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CAS No.

: 2081883-57-8

Mol F.

: C14H27N3O3

Mol W.

: 285.39

Cat No.

: SA33020

Edoxaban, Impurities

RSS-Edoxaban

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CAS No.

: 1255529-25-9

Mol F.

: C24H32ClN7O4S

Mol W.

: 550.07

Cat No.

: SA33005

Impurities, Nitrosamine, Ruxolitinib

Ruxolitinib 4-chloro-7-nitroso Pyrrolo Pyrimidine Impurity

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CAS No.

: NA

Mol F.

: C6H3ClN4O

Mol W.

: 182.57

Cat No.

: SA43407

Impurities, Nitrosamine, Ruxolitinib

Ruxolitinib Dinitroso Pyrrolo Pyrimidine Impurity

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CAS No.

: NA

Mol F.

: C9H5N7O2

Mol W.

: 243.18

Cat No.

: SA43406

Impurities, Ruxolitinib

Ruxolitinib M18 metabolite impurity

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CAS No.

: 1315607-85-2

Mol F.

: C17H18N6O

Mol W.

: 322.36

Cat No.

: SA43404

Impurities, Nitrosamine, Ruxolitinib

Ruxolitinib N-Nitroso Pyrazole Boronate Ester

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CAS No.

: NA

Mol F.

: C9H14BN3O3

Mol W.

Cat No.

: SA43408

Impurities, Nitrosamine, Ruxolitinib

Ruxolitinib N-Nitroso Trimethylsilyl Ethoxy Impurity

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CAS No.

: NA

Mol F.

: C15H20N6O2Si

Mol W.

: 344.44

Cat No.

: SA43405

Impurities, Ruxolitinib

Ruxolitinib N-oxide 1

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CAS No.

Mol F.

: C17H18N6O

Mol W.

: 322.37

Cat No.

: SA43401

Impurities, Ruxolitinib

Ruxolitinib N-oxide 2

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CAS No.

Mol F.

: C17H18N6O

Mol W.

: 322.37

Cat No.

: SA43402

Impurities, Nicotine

S-(-)-Nicotine Ditartrate Dihydrate

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CAS No.

: 6019-06-3

Mol F.

: C₁₀H₁₄N₂•2(C₄H₆O₆)•2(H₂O)

Mol W.

: 498.44

Cat No.

: SA32208

Impurities, Manidipine

S-(+)-Manidipine

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CAS No.

: 126451-47-6

Mol F.

: C₃₅H₃₈N₄O₆

Mol W.

: 610.7

Cat No.

: SA29803

Amisulpride, Impurities

S-Amisulpride

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CAS No.

: 71675-92-8

Mol F.

: C17H27N3O4S

Mol W.

: 369.5

Cat No.

: SA55502

Amlodipine, Impurities

S-Amlodipine Besylate

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CAS No.

: 150566-71-5

Mol F.

: C26H31ClN2O8S

Mol W.

: 567.05

Cat No.

: SA30527

Fulvestrant, Impurities

S-Deoxo ∆6-Fulvestrant; Delta (6,7) Deoxo Fulvestrant Impurity

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CAS No.

: 2170200-16-3

Mol F.

: C32H45F5O2S

Mol W.

: 588.76

Cat No.

: SA11806

Fulvestrant, Impurities

S-Deoxo-3,17β-bis-(O-tetrahydro-2H-pyran-2-yl)-6-oxo-fulvestrant

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CAS No.

: 862700-70-7

Mol F.

: C42H61F5O5S

Mol W.

: 772.99

Cat No.

: SA11808

Impurities, Topiramate

S-Hydroxy Topiramate

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CAS No.

: 198215-62-2

Mol F.

: C12H21NO9S

Mol W.

: 355.36

Cat No.

: SA45514

Impurities, Sacubitril

Sacubitril (3R,5S)-Pyrrolidinone Impurity

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CAS No.

: 1038924-70-7

Mol F.

: C18H19NO

Mol W.

: 265.35

Cat No.

: SA40906

Impurities, Sacubitril

Sacubitril (3S,5S)-Pyrrolidinone Impurity

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CAS No.

: 1038925-00-6

Mol F.

: C18H19NO

Mol W.

: 265.35

Cat No.

: SA40907

Impurities, Sacubitril

Sacubitril 2,5-Dioxopyrrolidine

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CAS No.

: 1038924-97-8

Mol F.

: C24H27NO4

Mol W.

: 393.48

Cat No.

: SA40902

Impurities, Sacubitril

Sacubitril Acetyl impurity

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CAS No.

: NA

Mol F.

: C22H27NO3

Mol W.

: 353.46

Cat No.

: SA40908

Impurities, Sacubitril

Sacubitril Desethyl Dessuccinyl Enamine Impurity | CAS : 2459446-56-9

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CAS No.

: 2459446-56-9

Mol F.

: C18H20ClNO2

Mol W.

: 317.81

Cat No.

: SA40922

Impurities, Sacubitril

Sacubitril Desethyl Impurity

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CAS No.

: 149709-44-4

Mol F.

: C22H25NO5

Mol W.

: 383.44

Cat No.

: SA40901

Impurities, Sacubitril

Sacubitril Desethyl N-Boc Enamine Impurity | CAS : 1012341-48-8

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CAS No.

: 1012341-48-8

Mol F.

: C23H27NO4

Mol W.

: 381.46

Cat No.

: SA40912

Impurities, Sacubitril

Sacubitril Dessuccinyl Enamine Impurity | CAS : 2957885-25-3

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CAS No.

: 2957885-25-3

Mol F.

: C20H24ClNO2

Mol W.

: 345.86

Cat No.

: SA40920

Impurities, Sacubitril

Sacubitril Dessuccinyl Impurity | CAS : 149690-12-0

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CAS No.

: 149690-12-0

Mol F.

: C20H26ClNO2

Mol W.

: 347.88

Cat No.

: SA40931

Impurities, Sacubitril

Sacubitril Dessuccinyl N-Boc Enamine Impurity | CAS : 1817838-91-7

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CAS No.

: 1817838-91-7

Mol F.

: C25H31NO4

Mol W.

: 409.52

Cat No.

: SA40921

Impurities, Sacubitril

Sacubitril Diisopropyl Ester Impurity | CAS : 2216755-67-6

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CAS No.

: 2216755-67-6

Mol F.

: C28H37NO5

Mol W.

: 467.60

Cat No.

: SA40928