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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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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

Impurities, Propranolol

RS-12:1-[(1-Methylethyl) amino]-3-(2-naphthalenyloxy)-2-propanol

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C16H21NO2

Mol W.

: 259.34

Cat No.

: SA24615

Edoxaban, Impurities

RSR-Edoxaban

Please enquire for price & pack size

In Stock

CAS No.

: 1255529-23-7

Mol F.

: C24H30ClN7O4S

Mol W.

: 548.06

Cat No.

: SA33004

Edoxaban, Impurities

RSS Boc-Cyclohexyl Isomer of Edoxaban | CAS : 365998-36-3

Please enquire for price & pack size

In Stock

CAS No.

: 365998-36-3

Mol F.

: C14H27N3O3

Mol W.

: 671.87

Cat No.

: SA33053

Impurities, Sitagliptin

S-Sitagliptin N-Boc impurity

$250.00 25 mg

In Stock

CAS No.

Mol F.

: C21H23F6N5O3

Mol W.

: 507.43

Cat No.

: SA10418

Impurities, Salbutamol

Salbutamol EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 96948-64-0

Mol F.

: C12H19NO2

Mol W.

: 209.28

Cat No.

: SA26001

Impurities, Salbutamol

Salbutamol EP Impurity C

$300.00 25 mg

In Stock

CAS No.

: 18910-68-4

Mol F.

: C13H21NO2

Mol W.

: 223.31

Cat No.

: SA26002

Impurities, Salbutamol

Salbutamol EP Impurity D; Albuterol Aldehyde

Please enquire for price & pack size

In Stock

CAS No.

: 156339-88-7

Mol F.

: C13H19NO3

Mol W.

: 237.29

Cat No.

: SA26003

Impurities, Salbutamol

Salbutamol EP Impurity E; N-Benzyl Albuterol

Please enquire for price & pack size

In Stock

CAS No.

: 24085-03-8

Mol F.

: C20H27NO3

Mol W.

: 329.43

Cat No.

: SA26004

Impurities, Salbutamol

Salbutamol EP Impurity F; Albuterol Dimer Ether

$900.00 25 mg

In Stock

CAS No.

: 147663-30-7

Mol F.

: C26H40N2O5

Mol W.

: 460.61

Cat No.

: SA26005

Impurities, Salbutamol

Salbutamol EP Impurity I; 4-Benzyl Albuterol

Please enquire for price & pack size

In Stock

CAS No.

: 56796-66-8

Mol F.

: C20H27NO3

Mol W.

: 329.43

Cat No.

: SA26008

Impurities, Salbutamol

Salbutamol EP Impurity J; Albuterol USP RC B

Please enquire for price & pack size

In Stock

CAS No.

: 156547-62-5(base);41489-89-8(HClSalt)

Mol F.

: C13H19NO3

Mol W.

: 237.29

Cat No.

: SA26009

Impurities, Salbutamol

Salbutamol EP Impurity M; O-Methyl Albuterol

Please enquire for price & pack size

In Stock

CAS No.

: 18910-70-8

Mol F.

: C14H23NO3

Mol W.

: 253.34

Cat No.

: SA26012

Impurities, Salbutamol

Salbutamol EP Impurity N; Albuterol Dimer

$900.00 25 mg

In Stock

CAS No.

: 149222-15-1

Mol F.

: C26H40N2O5

Mol W.

: 460.61

Cat No.

: SA26013

Impurities, Salbutamol

Salbutamol Impurity O

Please enquire for price & pack size

In Stock

CAS No.

: 2387728-91-6

Mol F.

: C15H25NO3

Mol W.

: 267.4

Cat No.

: SA26018

Aspirin, Impurities

Salicylic Acid

Please enquire for price & pack size

In Stock

CAS No.

: 69-72-7

Mol F.

: C₇H₆O₃

Mol W.

: 138.12

Cat No.

: SA28512

Impurities, Salmeterol

Salmeterol

Please enquire for price & pack size

In Stock

CAS No.

: 89365-50-4

Mol F.

: C₂₅H₃₇NO₄

Mol W.

: 415.57

Cat No.

: SA10100

Impurities, Salmeterol

Salmeterol EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 1798014-51-3

Mol F.

: C₁₉H₂₅NO₃

Mol W.

: 315.41

Cat No.

: SA10105

Impurities, Salmeterol

Salmeterol EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 94749-02-7

Mol F.

: C23H33NO4

Mol W.

: 387.51

Cat No.

: SA10101

Impurities, Salmeterol

Salmeterol EP impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 94749-11-8

Mol F.

: C24H35NO4

Mol W.

: 401.54

Cat No.

: SA10102

Impurities, Salmeterol

Salmeterol EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 108928-81-0

Mol F.

: C25H37NO4

Mol W.

: 415.57

Cat No.

: SA10103

Impurities, Salmeterol

Salmeterol EP Impurity F

Please enquire for price & pack size

In Stock

CAS No.

: 1391054-40-2

Mol F.

: C25H37NO3

Mol W.

: 399.57

Cat No.

: SA10104

Impurities, Salmeterol

Salmeterol Xinafoate API

Please enquire for price & pack size

In Stock

CAS No.

: 94749-08-3

Mol F.

: C36H45NO7

Mol W.

: 603.75

Cat No.

: SA10110

Aspirin, Impurities

Salsalate

Please enquire for price & pack size

In Stock

CAS No.

: 552-94-3

Mol F.

: C14H10O5

Mol W.

: 258.23

Cat No.

: SA28513

Impurities, Saxagliptin

Saxagliptin Carboxylic Acid Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1802786-89-5

Mol F.

: C18H26N2O4

Mol W.

: 334.41

Cat No.

: SA27402

Impurities, Tiotropium

Scopine Hydrochloride

$100.00 25 mg

In Stock

CAS No.

: 85700-55-6

Mol F.

: C8H14ClNO2

Mol W.

: 191.66

Cat No.

: SA11715

Impurities, Tiotropium

Scopoline

$130.00 25 mg

In Stock

CAS No.

: 487-27-4

Mol F.

: C8H13NO2

Mol W.

: 155.19

Cat No.

: SA11719

Impurities, Sertraline

Sertraline Tetralone

Please enquire for price & pack size

In Stock

CAS No.

: 79560-19-3

Mol F.

: C16H12Cl2O

Mol W.

: 291.17

Cat No.

: SA36517

Impurities, Sitagliptin

Sitagliptin Acid Impurity

$78.00 25 mg

In Stock

CAS No.

: 936630-57-8; 1204818-19-8

Mol F.

: C10H10F3NO2

Mol W.

: 233.19

Cat No.

: SA10416

Impurities, Sitagliptin

Sitagliptin Dimer Impurity

$250.00 25 mg

In Stock

CAS No.

: 2072867-07-1

Mol F.

: C26H23F9N6O2

Mol W.

: 622.49

Cat No.

: SA10417

Impurities, Sitagliptin

Sitagliptin Enamine Impurity

$78.00 25 mg

In Stock

CAS No.

: 767340-03-4

Mol F.

: C16H13F6N5O

Mol W.

: 405.3

Cat No.

: SA10414

Impurities, Sitagliptin

Sitagliptin Fumarate Adduct

$299.00 25 mg

In Stock

CAS No.

: 2088771-60-0

Mol F.

: C20H19F6N5O5

Mol W.

: 523.39

Cat No.

: SA10402

Impurities, Sitagliptin

Sitagliptin impurity 16

$395.00 25 mg

In Stock

CAS No.

: 769195-20-2

Mol F.

: C24H22F6N6O2

Mol W.

: 540.5

Cat No.

: SA10451