Home / Products / Impurities

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.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Candesartan, Impurities

Candesartan

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 145040-37-5

Mol F.

: C33H34N6O6

Mol W.

: 610.66

Cat No.

: SA39100

Candesartan, Impurities

Candesartan EP Impurity A

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 139481-58-6

Mol F.

: C26H24N6O3

Mol W.

: 468.51

Cat No.

: SA39101

Candesartan, Impurities

Candesartan EP Impurity B

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 869631-11-8

Mol F.

: C31H30N6O6

Mol W.

: 582.61

Cat No.

: SA39102

Candesartan, Impurities

Candesartan EP Impurity C

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1185255-99-5

Mol F.

: C33H34N6O6

Mol W.

: 610.66

Cat No.

: SA39103

Candesartan, Impurities

Candesartan EP Impurity D

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1185256-03-4

Mol F.

: C33H34N6O6

Mol W.

: 610.66

Cat No.

: SA39104

Candesartan, Impurities

Candesartan EP Impurity E

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 914613-35-7

Mol F.

: C35H38N6O6

Mol W.

: 638.71

Cat No.

: SA39105

Candesartan, Impurities

Candesartan EP Impurity F

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 914613-36-8

Mol F.

: C35H38N6O6

Mol W.

: 638.71

Cat No.

: SA39106

Candesartan, Impurities

Candesartan EP Impurity G

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 139481-59-7

Mol F.

: C24H20N6O3

Mol W.

: 440.45

Cat No.

: SA39107

Candesartan, Impurities

Candesartan EP Impurity H

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 170791-09-0

Mol F.

: C52H48N6O6

Mol W.

: 852.97

Cat No.

: SA39108

Candesartan, Impurities

Candesartan EP Impurity I

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 139481-69-9

Mol F.

: C25H22N6O3

Mol W.

: 454.48

Cat No.

: SA39109

Cangrelor, Impurities

Cangrelor

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 163706-06-7

Mol F.

: C17H25Cl2F3N5O12P3S2

Mol W.

: 776.36

Cat No.

: SA29400

Cangrelor, Impurities

Cangrelor Tetrasodium Salt

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 163706-36-3

Mol F.

: C₁₇H₂₁Cl₂F₃N₅Na₄O₁₂P₃S₂

Mol W.

: 864.29

Cat No.

: SA29407

Cangrelor, Impurities

Cangrelor Triacetate Impurity

$255.00 25 mg

PLEASE ENQUIRE

CAS No.

: 1830294-26-2

Mol F.

: C₂₂H₂₈F₃N₅O₇S₂

Mol W.

: 595.61

Cat No.

: SA29403

Capecitabine, Impurities

Capecitabine

$80.00 25 mg

PLEASE ENQUIRE

CAS No.

: 154361-50-9

Mol F.

: C15H22FN3O6

Mol W.

: 359.35

Cat No.

: SA37800

Capecitabine, Impurities

Capecitabine alpha-Isomer

$650.00 25 mg

PLEASE ENQUIRE

CAS No.

Mol F.

: C15H22FN3O6

Mol W.

: 359.35

Cat No.

: SA37812

Capecitabine, Impurities

Capecitabine EP Impurity A

$100.00 25 mg

PLEASE ENQUIRE

CAS No.

: 66335-38-4

Mol F.

: C9H12FN3O4

Mol W.

: 245.21

Cat No.

: SA37801

Capecitabine, Impurities

Capecitabine EP Impurity B

$80.00 25 mg

PLEASE ENQUIRE

CAS No.

: 3094-09-5

Mol F.

: C9H11FN2O5

Mol W.

: 246.19

Cat No.

: SA37802

Capecitabine, Impurities

Capecitabine EP Impurity F

$150.00 25 mg

PLEASE ENQUIRE

CAS No.

: 921769-65-5

Mol F.

: C16H20FN3O7

Mol W.

: 385.34

Cat No.

: SA37806

Capecitabine, Impurities

Capecitabine Methoxy Analog

$350.00 25 mg

PLEASE ENQUIRE

CAS No.

: 296248-49-2

Mol F.

: C11H14FN3O6

Mol W.

: 303.24

Cat No.

: SA37810

Captopril

Captopril EP Impurity A

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 64806-05-9

Mol F.

: C18H28N2O6S2

Mol W.

: 432.55

Cat No.

: SA79300

Captopril

Captopril EP Impurity F

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 63250-36-2

Mol F.

: C9H15NO3S

Mol W.

: 217.29

Cat No.

: SA79301

Carbamazepine, Impurities

Carbamazepine 10,11-Epoxide

$95.00 25 mg

PLEASE ENQUIRE

CAS No.

: 36507-30-9

Mol F.

: C15H12N2O2

Mol W.

: 252.27

Cat No.

: SA20315

Carbamazepine, Impurities

Carbamazepine 3-O-(TBDMS) Azepine Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C20H25NOSi

Mol W.

: 323.5

Cat No.

: SA20334

Carbamazepine, Impurities

Carbamazepine 3-O-(TBDMS) Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C21H26N2O2Si

Mol W.

: 366.53

Cat No.

: SA20325

Carbamazepine, Impurities

Carbamazepine EP Impurity B

$95.00 25 mg

PLEASE ENQUIRE

CAS No.

: 611-64-3

Mol F.

: C14H11N

Mol W.

: 193.24

Cat No.

: SA20308

Carbamazepine, Impurities

Carbamazepine EP Impurity F

$75.00 25 mg

PLEASE ENQUIRE

CAS No.

: 33948-22-0

Mol F.

: C15H10ClNO

Mol W.

: 255.7

Cat No.

: SA20312

Carbamazepine, Impurities

Carbamazepine N-Bromocarbonyl Impurity

$395.00 25 mg

PLEASE ENQUIRE

CAS No.

: 40421-05-4

Mol F.

: C15H10BrNO

Mol W.

: 300.15

Cat No.

: SA20305

Carbamazepine, Impurities

Carbamazepine Triisopropylsilyl Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C24H32N2O2Si

Mol W.

: 408.61

Cat No.

: SA20322

Carbamazepine, Impurities

Carbamazepine Triisopropylsilyl-oxy Azepine Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C23H31NOSi

Mol W.

: 365.58

Cat No.

: SA20342

Impurities, Tobramycin

Carbamoyl Kanamycin B

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 51736-76-6

Mol F.

: C19H38N6O11

Mol W.

: 526.5

Cat No.

: SA32809

Carisoprodol, Impurities

Carbamyl Benzyl Ester

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 621-84-1

Mol F.

: C₈H₉NO₂

Mol W.

: 151.16

Cat No.

: SA25308

Carbidopa

$75.00 25 mg

PLEASE ENQUIRE

CAS No.

: 38821-49-7 (Monohydrate); 28860-95-9 (free base)

Mol F.

: C10H16N2O5

Mol W.

: 244.24

Cat No.

: SA31800

Carbidopa

Carbidopa EP Impurity I

$355.00 10 mg

PLEASE ENQUIRE

CAS No.

: 1246819-09-9

Mol F.

: C10H13BrN2O4

Mol W.

: 305.13

Cat No.

: SA31809

Carbocisteine

Carbocisteine Lactum Sodium Salt

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 88933-48-6

Mol F.

: C5H6NO3S.Na

Mol W.

: 183.16

Cat No.

: SA79400

Carbocisteine

Carbocisteine Sulfoxide-Mixture of diastereomers

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 5439-87-2

Mol F.

: C5H9NO5S

Mol W.

: 195.19

Cat No.

: SA79401

Abacavir, Impurities

Carbovir Monophosphate

$495.00 25 mg

PLEASE ENQUIRE

CAS No.

: 144490-73-3

Mol F.

: C11H14N5O5P

Mol W.

: 327.23

Cat No.

: SA18116

Carfilzomib, Impurities

Carfilzomib (2R,4R)-2-Hydroxy O-Acettyl Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C42H61N5O9

Mol W.

: 779.96

Cat No.

: SA45005

Carfilzomib, Impurities

Carfilzomib (2R,4R)-Diol

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C40H59N5O8

Mol W.

: 737.93

Cat No.

: SA45004

Carfilzomib, Impurities

Carfilzomib (2R,4R)-Diol (7R)-Isomer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C40H59N5O8

Mol W.

: 737.93

Cat No.

: SA45006

Carfilzomib, Impurities

Carfilzomib (2R,4S) Hydroxysuccinic Acid Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C46H65N5014

Mol W.

: 912.05

Cat No.

: SA45016

Carfilzomib, Impurities

Carfilzomib (2R,4S)-2-Hydroxy O-Acetyl Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1541171-69-0

Mol F.

: C42H61N5O9

Mol W.

: 779.96

Cat No.

: SA45007

Carfilzomib, Impurities

Carfilzomib (2R,4S)-Diol

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1541172-75-1

Mol F.

: C40H59N5O8

Mol W.

: 737.93

Cat No.

: SA45003

Carfilzomib, Impurities

Carfilzomib (2S,4R) Diol Isomer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C40H59N5O8

Mol W.

: 737.94

Cat No.

: SA45018

Carfilzomib, Impurities

Carfilzomib (2S,4R)-2-Hydroxy O-Acetyl Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C42H61N5O9

Mol W.

: 779.96

Cat No.

: SA45010

Carfilzomib, Impurities

Carfilzomib (2S,4R)-Diol (7R)-Isomer

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C40H59N5O8

Mol W.

: 737.93

Cat No.

: SA45011

Carfilzomib, Impurities

Carfilzomib (2S,4S)-2-Hydroxy O-Acetyl Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: NA

Mol F.

: C42H61N5O9

Mol W.

: 779.96

Cat No.

: SA45012

Carfilzomib, Impurities

Carfilzomib Chloro Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 1541171-67-8

Mol F.

: C40H58ClN5O7

Mol W.

: 756.4

Cat No.

: SA45020

Carfilzomib, Impurities

Carfilzomib D-Phe Isomer Impurity

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

: 2049025-49-0

Mol F.

: C40H57N5O7

Mol W.

: 719.9

Cat No.

: SA45019

Carfilzomib, Impurities

Carfilzomib Dimer Impurity-1

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C65H88N8O10

Mol W.

: 1140.6

Cat No.

: SA45000

Carfilzomib, Impurities

Carfilzomib Dimer Impurity-2

Please enquire for price & pack size

PLEASE ENQUIRE

CAS No.

Mol F.

: C55H77N7O9

Mol W.

: 980.3

Cat No.

: SA45001