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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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Benazepril, Impurities

Benazepril EP Impurity E

$150.00 25 mg

In Stock

CAS No.

: 88372-47-8

Mol F.

: C12H14N2O3

Mol W.

: 234.25

Cat No.

: SA29605

Benazepril, Impurities

Benazepril EP Impurity F

$95.00 25 mg

In Stock

CAS No.

: 109010-60-8

Mol F.

: C16H22N2O3

Mol W.

: 290.36

Cat No.

: SA29606

Benazepril, Impurities

Benazepril EP Impurity G

$195.00 25 mg

In Stock

CAS No.

: 103129-58-4

Mol F.

: C26H32N2O5

Mol W.

: 452.54

Cat No.

: SA29607

Impurities, Nortropine

Benzilic acid isopropyl ester Impurity

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C17H18O3

Mol W.

: 270.32

Cat No.

: SA46600

Impurities, Ticagrelor

Benzyl ((3aS,4R,6S,6aR)-6-hydroxy-2,2-dimethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl)carbamate (TGA-1)

Please enquire for price & pack size

In Stock

CAS No.

: 274693-53-7

Mol F.

: C16H21NO5

Mol W.

: 307.34

Cat No.

: SA32509

Impurities, Ticagrelor

Benzyl (3aS,4R,6S,6aR)-6-(2-hydroxyethoxy)-2,2-dimethyl-tetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-ylcarbamate

Please enquire for price & pack size

In Stock

CAS No.

: 274693-54-8

Mol F.

: C18H25NO6

Mol W.

: 351.39

Cat No.

: SA32512

Famciclovir, Impurities

Benzyl triethyl ammonium chloride

Please enquire for price & pack size

In Stock

CAS No.

: 56-37-1

Mol F.

: C13H22ClN

Mol W.

: 227.77

Cat No.

: SA48302

Beclomethasone Dipropionate, Impurities

Betamethasone 9,11-Epoxide 17-Propionate

$195.00 25 mg

In Stock

CAS No.

: 79578-39-5

Mol F.

: C25H32O6

Mol W.

: 428.52

Cat No.

: SA15620

Beclomethasone Dipropionate, Impurities

Betamethasone 9,11-Epoxide 21-Propionate

$195.00 25 mg

In Stock

CAS No.

: 205105-83-5

Mol F.

: C25H32O6

Mol W.

: 428.52

Cat No.

: SA15612

Betamethasone, Impurities

Betamethasone Acetate Related Compound D

$125.00 25 mg

In Stock

CAS No.

: 912-38-9

Mol F.

: C24H30O6

Mol W.

: 414.49

Cat No.

: SA26613

Betamethasone Dipropionate, Impurities

Betamethasone Dipropionate EP Impurity A

$75.00 25 mg

In Stock

CAS No.

: 378-44-9

Mol F.

: C22H29FO5

Mol W.

: 392.46

Cat No.

: SA14506

Betamethasone Dipropionate, Impurities

Betamethasone Dipropionate EP Impurity B

$295.00 25 mg

In Stock

CAS No.

: 5534-13-4

Mol F.

: C25H33FO6

Mol W.

: 448.52

Cat No.

: SA14504

Betamethasone Dipropionate, Impurities

Betamethasone Dipropionate EP Impurity C

$145.00 25 mg

In Stock

CAS No.

: 75883-07-7

Mol F.

: C25H33FO6

Mol W.

: 448.52

Cat No.

: SA14501

Betamethasone Dipropionate, Impurities

Betamethasone Dipropionate EP Impurity D

$255.00 25 mg

In Stock

CAS No.

: 5514-81-8

Mol F.

: C27H35FO7

Mol W.

: 490.56

Cat No.

: SA14505

Betamethasone Dipropionate, Impurities

Betamethasone Dipropionate EP Impurity E

$95.00 25 mg

In Stock

CAS No.

: 5534-09-8

Mol F.

: C28H37ClO7

Mol W.

: 521.04

Cat No.

: SA14507

Betamethasone Dipropionate, Impurities

Betamethasone Dipropionate EP Impurity G

$145.00 25 mg

In Stock

CAS No.

: 1186048-33-8

Mol F.

: C31H41FO8

Mol W.

: 560.65

Cat No.

: SA14503

Betamethasone, Impurities

Betamethasone EP Impurity B

$175.00 25 mg

In Stock

CAS No.

: 25122-41-2

Mol F.

: C22H28ClFO4

Mol W.

: 410.91

Cat No.

: SA26602

Betamethasone, Impurities

Betamethasone EP Impurity C

$195.00 25 mg

In Stock

CAS No.

: 13504-15-9

Mol F.

: C22H28O4

Mol W.

: 356.46

Cat No.

: SA26603

Betamethasone, Impurities

Betamethasone EP Impurity D

$195.00 25 mg

In Stock

CAS No.

: 52619-05-3

Mol F.

: C25H33FO7

Mol W.

: 464.52

Cat No.

: SA26604

Betamethasone, Impurities

Betamethasone EP Impurity E

$125.00 25 mg

In Stock

CAS No.

: 981-34-0

Mol F.

: C22H28O5

Mol W.

: 372.45

Cat No.

: SA26605

Betamethasone, Impurities

Betamethasone EP Impurity G

$935.00 25 mg

In Stock

CAS No.

: 85700-75-0

Mol F.

: C22H30O5

Mol W.

: 374.47

Cat No.

: SA26607

Betamethasone Valerate, Impurities

Betamethasone Valerate EP Impurity A

$95.00 25 mg

In Stock

CAS No.

: 378-44-9

Mol F.

: C22H29FO5

Mol W.

: 392.46

Cat No.

: SA18500

Betamethasone Valerate, Impurities

Betamethasone Valerate EP Impurity B

$355.00 25 mg

In Stock

CAS No.

: 1879-77-2

Mol F.

: C22H29FO4

Mol W.

: 376.46

Cat No.

: SA18507

Betamethasone Valerate, Impurities

Betamethasone Valerate EP Impurity C

$195.00 25 mg

In Stock

CAS No.

: 33755-46-3

Mol F.

: C27H37FO6

Mol W.

: 476.58

Cat No.

: SA18501

Betamethasone Valerate, Impurities

Betamethasone Valerate EP Impurity D

$195.00 25 mg

In Stock

CAS No.

Mol F.

: C27H37BrO6

Mol W.

: 537.48

Cat No.

: SA18506

Betamethasone Valerate, Impurities

Betamethasone Valerate EP Impurity E

$175.00 25 mg

In Stock

CAS No.

: 2240-28-0

Mol F.

: C27H37FO6

Mol W.

: 476.58

Cat No.

: SA18502

Betamethasone Valerate, Impurities

Betamethasone Valerate EP Impurity H

$295.00 25 mg

In Stock

CAS No.

: 52619-18-8

Mol F.

: C27H37ClO6

Mol W.

: 493.03

Cat No.

: SA18504

Betamethasone Valerate, Impurities

Betamethasone Valerate EP Impurity I

$355.00 25 mg

In Stock

CAS No.

: 2802-10-0

Mol F.

: C26H35FO6

Mol W.

: 462.55

Cat No.

: SA18505

Impurities, Valacyclovir

Bis Valacyclovir; Valaciclovir- Impurity P

Please enquire for price & pack size

In Stock

CAS No.

: 1356019-51-6

Mol F.

: C27H40N12O8

Mol W.

: 660.68

Cat No.

: SA49504

Bisoprolol, Impurities

Bisoprolol

Please enquire for price & pack size

In Stock

CAS No.

: 66722-44-9 (Freebase); 104344-23-2 (Salt)

Mol F.

: C18H31NO4

Mol W.

: 325.44

Cat No.

: SA35600

Bisoprolol, Impurities

Bisoprolol Benzyl Alcohol Epoxide Impurity

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C10H12O3

Mol W.

: 180.2

Cat No.

: SA35618

Bisoprolol, Impurities

Bisoprolol EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 62572-93-4

Mol F.

: C13H21NO3

Mol W.

: 239.31

Cat No.

: SA35601

Bisoprolol, Impurities

Bisoprolol EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 1447715-44-7

Mol F.

: C18H31NO4

Mol W.

: 325.44

Cat No.

: SA35602

Bisoprolol, Impurities

Bisoprolol EP Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 1797132-90-1

Mol F.

: C25H38N2O4

Mol W.

: 430.58

Cat No.

: SA35603

Bisoprolol, Impurities

Bisoprolol EP Impurity D

Please enquire for price & pack size

In Stock

CAS No.

: 1225195-71-0

Mol F.

: C26H40N2O5

Mol W.

: 460.61

Cat No.

: SA35604

Bisoprolol, Impurities

Bisoprolol EP Impurity K

Please enquire for price & pack size

In Stock

CAS No.

: 864544-37-6

Mol F.

: C18H29NO5

Mol W.

: 339.43

Cat No.

: SA35609

Bisoprolol, Impurities

Bisoprolol EP Impurity L

Please enquire for price & pack size

In Stock

CAS No.

: 29122-74-5

Mol F.

: C13H19NO3

Mol W.

: 237.29

Cat No.

: SA35610

Bisoprolol, Impurities

Bisoprolol EP Impurity M

Please enquire for price & pack size

In Stock

CAS No.

: 177034-57-0

Mol F.

: C12H18O3

Mol W.

: 210.27

Cat No.

: SA35611

Bisoprolol, Impurities

Bisoprolol EP Impurity N

Please enquire for price & pack size

In Stock

CAS No.

: 1346601-75-9(base)

Mol F.

: C17H29NO4

Mol W.

: 311.42

Cat No.

: SA35612

Bisoprolol, Impurities

Bisoprolol EP Impurity Q

Please enquire for price & pack size

In Stock

CAS No.

: 1346604-00-9

Mol F.

: C16H27NO4

Mol W.

: 297.39

Cat No.

: SA35613

Bisoprolol, Impurities

Bisoprolol EP Impurity R

Please enquire for price & pack size

In Stock

CAS No.

: 5790-46-5; 2934-02-3 (HCl Salt)

Mol F.

: C13H21NO2

Mol W.

: 223.31

Cat No.

: SA35614

Bisoprolol, Impurities

Bisoprolol Epoxide Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 66722-57-4

Mol F.

: C15H22O4

Mol W.

: 266.33

Cat No.

: SA35617

Aminocaproic Acid, Impurities

Boc-6-aminohexanoic Acid

Please enquire for price & pack size

In Stock

CAS No.

: 6404-29-1

Mol F.

: C₁₁H₂₁NO₄

Mol W.

: 231.29

Cat No.

: SA22609

Bosentan, Impurities

Bosentan Dimer

Please enquire for price & pack size

In Stock

CAS No.

: 1097263-60-9

Mol F.

: C52H52N10O10S2

Mol W.

: 1041.16

Cat No.

: SA28609

Brexpiprazole, Impurities

Brexpiprazole (3,4)-Dihydro-2(1H)-quinolinone

Please enquire for price & pack size

In Stock

CAS No.

: 913612-07-4

Mol F.

: C25H29N3O2S

Mol W.

: 435.58

Cat No.

: SA41323

Brexpiprazole, Impurities

Brexpiprazole N-Oxide

Please enquire for price & pack size

In Stock

CAS No.

: 1191900-58-9

Mol F.

: C25H27N3O3S

Mol W.

: 449.57

Cat No.

: SA41304

Brexpiprazole, Impurities

Brexpiprazole N,N-dioxide Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 2247155-42-4

Mol F.

: C25H27N3O4S

Mol W.

: 465.56

Cat No.

: SA41329

Brexpiprazole, Impurities

Brexpiprazole regioisomer Impurity

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C25H28N3O2S

Mol W.

: 434.58

Cat No.

: SA41330

Brimonidine, Impurities

Brimonidine

$100.00 25 mg

In Stock

CAS No.

: 59803-98-4

Mol F.

: C11H10BrN5

Mol W.

: 292.13

Cat No.

: SA20712

Brimonidine, Impurities

Brimonidine 2,3-Dione Impurity

$350.00 25 mg

In Stock

CAS No.

: 182627-95-8

Mol F.

: C11H10BrN5O2

Mol W.

: 324.13

Cat No.

: SA20701