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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, Rivaroxaban

Rivaroxaban Impurity C

$80.00 25 mg

In Stock

CAS No.

: 24065-33-6

Mol F.

: C₅H₃ClO₂S

Mol W.

: 162.59

Cat No.

: SA18603

Impurities, Rivaroxaban

Rivaroxaban Impurity E

$80.00 25 mg

In Stock

CAS No.

: 97799-98-9

Mol F.

: C₆H₆ClNOS

Mol W.

: 175.64

Cat No.

: SA18610

Impurities, Rivaroxaban

Rivaroxaban Impurity H

$100.00 25 mg

In Stock

CAS No.

: 1429334-00-8

Mol F.

: C16H19N3O5

Mol W.

: 333.34

Cat No.

: SA18613

Impurities, Rivaroxaban

Rivaroxaban Nitroso Impurity 1

Please enquire for price & pack size

In Stock

CAS No.

: 25413-76-7

Mol F.

: C8H10N2O2

Mol W.

: 166.18

Cat No.

: SA18634

Impurities, Rivaroxaban

Rivaroxaban Nitroso Impurity 5

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C13H16ClN3O4

Mol W.

: 313.7

Cat No.

: SA18632

Impurities, Rivaroxaban

Rivaroxaban open ring dimer

$250.00 25 mg

In Stock

CAS No.

: 1632463-24-1

Mol F.

: C₃₈H₃₆Cl₂N₆O₁₀S₂

Mol W.

: 871.76

Cat No.

: SA18621

Impurities, Rivaroxaban

Rivaroxaban Open-Ring acid Impurity

$295.00 25 mg

In Stock

CAS No.

: 931204-39-6; 931117-61-2

Mol F.

: C19H20ClN3O6S

Mol W.

: 453.9

Cat No.

: SA18614

Impurities, Rivaroxaban

Rivaroxaban Phthalamide Dimer

$100.00 25 mg

In Stock

CAS No.

: 1365267-36-2

Mol F.

: C₃₆H₃₆N₆O₁₀

Mol W.

: 712.71

Cat No.

: SA18605

Impurities, Rivaroxaban

Rivaroxaban Phthalimido Descarbonyl Impurity

$80.00 25 mg

In Stock

CAS No.

: 446292-07-5

Mol F.

: C21H21N3O5

Mol W.

: 395.41

Cat No.

: SA18625

Impurities, Rivaroxaban

Rivaroxaban Phthalimido Descarbonyl Nitroso Impurity

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C21H20N4O6

Mol W.

: 424.41

Cat No.

: SA18633

Impurities, Rivaroxaban

Rivaroxaban Phthalimido Impurity

$80.00 25 mg

In Stock

CAS No.

: 446292-08-6

Mol F.

: C22H19N3O6

Mol W.

: 421.40

Cat No.

: SA18609

Impurities, Rivaroxaban

Rivaroxaban Related Compound H; 4,5-Dichlorothiophene Rivaroxaban

$165.00 25 mg

In Stock

CAS No.

: 1770812-37-7

Mol F.

: C19H17Cl2N3O5S

Mol W.

: 470.33

Cat No.

: SA18622

Rivaroxaban

Rivaroxaban Urea Dimer

$100.00 25 mg

In Stock

CAS No.

: 1365267-35-1

Mol F.

: C₂₉H₃₂N₆O₉

Mol W.

: 608.6

Cat No.

: SA18604

Impurities, Rosuvastatin

Rosuvastatin (3R,5R)-Isomer t-Butyl Ester

$350.00 25 mg

In Stock

CAS No.

: 2162136-65-2

Mol F.

: C26H36FN3O6S

Mol W.

: 537.64

Cat No.

: SA12170

Impurities, Rosuvastatin

Rosuvastatin (4R,6R) acetonide t-Butyl Ester

$350.00 25 mg

In Stock

CAS No.

: 2758676-77-4

Mol F.

: C29H40FN3O6S

Mol W.

: 577.71

Cat No.

: SA121101

Impurities, Rosuvastatin

Rosuvastatin (4S,6S) Acetonide t-Butyl Ester

$200.00 10 mg

In Stock

CAS No.

: 1378943-63-5

Mol F.

: C29H40FN3O6S

Mol W.

: 577.71

Cat No.

: SA121102

Impurities, Rosuvastatin

Rosuvastatin (6R)-Isomer Sodium Salt

$250.00 25 mg

In Stock

CAS No.

: 854898-48-9 (Acid); 854898-49-0

Mol F.

: C22H27FN3NaO6S

Mol W.

: 503.52

Cat No.

: SA12180

Impurities, Rosuvastatin

Rosuvastatin (6R)-Lactone Impurity

$400.00 25 mg

In Stock

CAS No.

: 854898-46-7

Mol F.

: C22H26FN3O5S

Mol W.

: 463.52

Cat No.

: SA12161

Impurities, Rosuvastatin

Rosuvastatin (6S)-Isomer (Sodium Salt)

$550.00 25 mg

In Stock

CAS No.

: 854898-53-6 (Acid); 854898-50-3

Mol F.

: C22H27FN3O6S.1/2Ca

Mol W.

: 503.52

Cat No.

: SA12164

Impurities, Rosuvastatin

Rosuvastatin (6S)-Isomer Methyl Ester

$1,555.00 50 mg

In Stock

CAS No.

Mol F.

: C23H30FN3O6S

Mol W.

: 495.56

Cat No.

: SA12167

Impurities, Rosuvastatin

Rosuvastatin 2,3-Anhydro (5S)-Lactone

$200.00 25 mg

In Stock

CAS No.

: 1246665-85-9

Mol F.

: C22H24FN3O4S

Mol W.

: 445.51

Cat No.

: SA12116

Impurities, Rosuvastatin

Rosuvastatin 2,3-Anhydro Acid Calcium Salt

$350.00 25 mg

In Stock

CAS No.

: 1422954-12-8(Acid)

Mol F.

: C22H25FN3O5S.1/2Ca

Mol W.

: 482.51

Cat No.

: SA12123

Impurities, Rosuvastatin

Rosuvastatin 5-Oxo Acid t-Butyl Ester

$250.00 25 mg

In Stock

CAS No.

: 615556-96-2

Mol F.

: C26H34FN3O6S

Mol W.

: 535.63

Cat No.

: SA12129

Impurities, Rosuvastatin

Rosuvastatin anti isomer

$120.00 10 mg

In Stock

CAS No.

: 1094100-06-7

Mol F.

: C22H27FN3O6S . 1/2 Ca

Mol W.

: 500.57

Cat No.

: SA121114

Impurities, Rosuvastatin

Rosuvastatin Calcium EP Impurity K

$350.00 25 mg

In Stock

CAS No.

: 1422954-12-8

Mol F.

: C22H26FN3O5S

Mol W.

: 463.5

Cat No.

: SA121100

Impurities, Rosuvastatin

Rosuvastatin D-5 Enatiomer Impurity

$145.00 25 mg

In Stock

CAS No.

: 2375865-91-9

Mol F.

: C15H26O6

Mol W.

: 302.4

Cat No.

: SA121110

Impurities, Rosuvastatin

Rosuvastatin Diphenylphosphine Oxide

$85.00 25 mg

In Stock

CAS No.

: 289042-10-0

Mol F.

: C28H29FN3O3PS

Mol W.

: 537.59

Cat No.

: SA12108

Impurities, Rosuvastatin

Rosuvastatin EP Impurity A (Acetone-adduct); Rosuvastatin Related compound A

$100.00 10 mg

In Stock

CAS No.

: 1715120-13-0 (Free acid); 1714147-47-3 (Calcium Salt); 1714147-50-8 (Sodium salt)

Mol F.

: C25H33FN3NaO7S

Mol W.

: 561.6

Cat No.

: SA12104

Impurities, Rosuvastatin

Rosuvastatin EP Impurity B

$300.00 25 mg

In Stock

CAS No.

: 1007871-86-4; 1094100-06-7 (acid)

Mol F.

: C22H27FN3O6S•1/2Ca

Mol W.

: 500.61

Cat No.

: SA12102

Impurities, Rosuvastatin

Rosuvastatin EP Impurity C; 5-Oxo Rosuvastatin; Rosuvastatin B2

$100.00 10 mg

In Stock

CAS No.

: 1422619-13-3 (acid);1422514-05-3 (calcium salt); 1620823-61-1 (sodium salt)

Mol F.

: C22H26FN3O6S

Mol W.

: 479.52

Cat No.

: SA12101

Impurities, Rosuvastatin

Rosuvastatin EP Impurity D; Rosuvastatin Lactone

$100.00 25 mg

In Stock

CAS No.

: 503610-43-3

Mol F.

: C22H26FN3O5S

Mol W.

: 463.52

Cat No.

: SA12103

Impurities, Rosuvastatin

Rosuvastatin EP Impurity E (Calcium Salt); Rosuvastatin Related compound B

$400.00 25 mg

In Stock

CAS No.

: 2226413-61-0 (acid)

Mol F.

: C38H45F2N6O9S2.1/2Ca

Mol W.

: 851.94

Cat No.

: SA12106

Impurities, Rosuvastatin

Rosuvastatin EP Impurity F; Rosuvastatin Acetonide tert-Butyl Ester;

$80.00 25 mg

In Stock

CAS No.

: 289042-12-2

Mol F.

: C29H40FN3O6S

Mol W.

: 577.71

Cat No.

: SA12130

Impurities, Rosuvastatin

Rosuvastatin EP Impurity G; Rosuvastatin enantiomer

$300.00 25 mg

In Stock

CAS No.

: 1242184-42-4(acid)

Mol F.

: C22H27FN3O6S . 1/2Ca

Mol W.

: 500.61

Cat No.

: SA12105

Impurities, Rosuvastatin

Rosuvastatin EP Impurity J (Calcium Salt)

$400.00 25 mg

In Stock

CAS No.

: 2226413-62-1 (free acid)

Mol F.

: C38H43F2N6O8S2 . 1/2Ca

Mol W.

: 813.91

Cat No.

: SA12107

Impurities, Rosuvastatin

Rosuvastatin EP Impurity L; 6,7-Dihydro Rosuvastatin Calcium Salt

$180.00 25 mg

In Stock

CAS No.

: 1024064-70-7 (Calcium); 1347362-67-7 (Sodium); 1347797-73-2 (Free Acid)

Mol F.

: C22H29FN3O6S.1/2Ca

Mol W.

: 502.54

Cat No.

: SA12131

Impurities, Rosuvastatin

Rosuvastatin EP impurity M; Rosuvastatin Sodium Salt

$250.00 25 mg

In Stock

CAS No.

: 847849-66-5

Mol F.

: C22H28NNaO6S

Mol W.

: 485.53

Cat No.

: SA12136

Impurities, Rosuvastatin

Rosuvastatin ethyl Ester

$100.00 25 mg

In Stock

CAS No.

: 851443-04-4

Mol F.

: C24H32FN3O6S

Mol W.

: 509.59

Cat No.

: SA12190

Impurities, Rosuvastatin

Rosuvastatin Formyl Impurity

$100.00 25 mg

In Stock

CAS No.

: 147118-37-4

Mol F.

: C16H18FN3O3S

Mol W.

: 351.4

Cat No.

: SA12187

Impurities, Rosuvastatin

Rosuvastatin FP Impurity B; Rosuvastatin EP Impurity H (Calcium salt)

$350.00 25 mg

In Stock

CAS No.

: 1335110-44-5

Mol F.

: C22H27FN3O6S•1/2Ca

Mol W.

: 500.61

Cat No.

: SA12189

Impurities, Rosuvastatin

Rosuvastatin Isoamyl Ester

$200.00 25 mg

In Stock

CAS No.

: 1197348-98-3

Mol F.

: C27H38FN3O6S

Mol W.

: 551.67

Cat No.

: SA12127

Impurities, Rosuvastatin

Rosuvastatin Methyl Ester

$150.00 25 mg

In Stock

CAS No.

: 147118-40-9

Mol F.

: C23H30FN3O6S

Mol W.

: 495.56

Cat No.

: SA12117

Impurities, Rosuvastatin

Rosuvastatin tert-Butyl Ester

$150.00 25 mg

In Stock

CAS No.

: 355806-00-7

Mol F.

: C26H36FN3O6S

Mol W.

: 537.64

Cat No.

: SA12115

Impurities, Sofosbuvir

RP-isomer of sofosbuvir; Sofosbuvir (R)-Phosphate

$595.00 25 mg

In Stock

CAS No.

: 1190308-01-0

Mol F.

: C22H29FN3O9P

Mol W.

: 529.46

Cat No.

: SA15405

Impurities, Rilpivirine

RPV Nitrile Desmethyl Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1862191-58-9

Mol F.

: C10H10N2

Mol W.

: 158.2

Cat No.

: SA25418

Ezetimibe, Impurities

RR-Ezetimibe Ketone

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C24H19F2NO3

Mol W.

: 407.41

Cat No.

: SA14856

Edoxaban, Impurities

RRR Boc-Cyclohexyl Diastereomer of Edoxaban

Please enquire for price & pack size

In Stock

CAS No.

: 2081883-53-4

Mol F.

: C14H27N3O3

Mol W.

: 285.38

Cat No.

: SA33019

Edoxaban, Impurities

RRR-Edoxaban

Please enquire for price & pack size

In Stock

CAS No.

: 1255529-24-8

Mol F.

: C24H30ClN7O4S

Mol W.

: 548.06

Cat No.

: SA33003

Edoxaban, Impurities

RRS Boc-Cyclohexyl Enantiomer of Edoxaban

Please enquire for price & pack size

In Stock

CAS No.

: 1353893-25-0

Mol F.

: C14H27N3O3

Mol W.

: 285.38

Cat No.

: SA33018

Edoxaban, Impurities

RRS-Edoxaban

Please enquire for price & pack size

In Stock

CAS No.

: 500572-10-1

Mol F.

: C24H32ClN7O4S

Mol W.

: 550.07

Cat No.

: SA33007