Home / Products / Impurities

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.

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

Chlorthalidone, Impurities

Chlorthalidone Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 82875-49-8

Mol F.

: C14H11ClN2O3S

Mol W.

: 322.77

Cat No.

: SA22404

Chlorthalidone, Impurities

Chlorthalidone Impurity G

Please enquire for price & pack size

In Stock

CAS No.

: 16289-13-7

Mol F.

: C14H9Cl2NO2

Mol W.

: 294.13

Cat No.

: SA22406

Chlorthalidone, Impurities

Chlorthalidone Impurity H

Please enquire for price & pack size

In Stock

CAS No.

: 2200280-98-2

Mol F.

: C17H17ClN2O4S

Mol W.

: 380.85

Cat No.

: SA22407

Chlorthalidone, Impurities

Chlorthalidone Impurity I

Please enquire for price & pack size

In Stock

CAS No.

: 2514668-27-8

Mol F.

: C17H16ClNO5S

Mol W.

: 381.83

Cat No.

: SA22408

Chlorthalidone, Impurities

Chlorthalidone Impurity J

Please enquire for price & pack size

In Stock

CAS No.

: 956-92-3

Mol F.

: C14H10ClNO2

Mol W.

: 259.69

Cat No.

: SA22410

Chlorthalidone, Impurities

Chlorthalidone Methyl ether

Please enquire for price & pack size

In Stock

CAS No.

: 96512-76-4

Mol F.

: C15H13ClN2O4S

Mol W.

: 352.79

Cat No.

: SA22409

Impurities, Ursodiol

Cholic Acid

Please enquire for price & pack size

In Stock

CAS No.

: 81-25-4

Mol F.

: C24H40O5

Mol W.

: 408.57

Cat No.

: SA31202

Ciclesonide, Impurities

Ciclesonide EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C32H44O7

Mol W.

: 540.69

Cat No.

: SA49101

Ciclesonide, Impurities

Ciclesonide EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 161115-59-9

Mol F.

: C28H38O6

Mol W.

: 470.6

Cat No.

: SA49102

Cinnarizine, Impurities

Cinnarizine EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 216581-01-0 (base); 56265-29-3 (dihydrochloridesalt)

Mol F.

: C30H30N2

Mol W.

: 418.5

Cat No.

: SA12402

Ciprofloxacin, Impurities

Ciprofloxacin 6-Chloro impurity

$255.00 25 mg

In Stock

CAS No.

: 93106-58-2

Mol F.

: C17H18ClN3O3

Mol W.

: 347.8

Cat No.

: SA34707

Ciprofloxacin, Impurities

Ciprofloxacin EP Impurity E

$155.00 25 mg

In Stock

CAS No.

: 105394-83-0

Mol F.

: C16H18FN3O

Mol W.

: 287.33

Cat No.

: SA34705

Impurities, Paroxetine

cis-(+)-Paroxetine Hydrochloride

$695.00 25 mg

In Stock

CAS No.

: 1396174-70-1

Mol F.

: C19H20FNO3

Mol W.

: 365.83

Cat No.

: SA18305

Impurities, Praziquantel

cis-Hydroxy Praziquantel

$120.00 25 mg

In Stock

CAS No.

: 134924-68-8

Mol F.

: C19H24N2O3

Mol W.

: 328.41

Cat No.

: SA13905

Impurities, Permethrin

cis-Permethrin | CAS : 61949-77-6

Please enquire for price & pack size

In Stock

CAS No.

: 61949-77-6

Mol F.

: C21H20Cl2O3

Mol W.

: 391.29

Cat No.

: SA51902

Citalopram, Impurities

Citalopram Carboxylic Acid Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 440121-09-5(base)

Mol F.

: C20H23BrFNO3

Mol W.

: 424.3

Cat No.

: SA17002

Citalopram, Impurities

Citalopram Chloromethyl Impurity

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C21H23Cl2FN2O

Mol W.

: 409.32

Cat No.

: SA17022

Citalopram, Impurities

Citalopram Didesmethyl Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1189694-81-2 (HCl salt); 62498-69-5 (base)

Mol F.

: C18H17FN2O (Free Base), C18H18ClFN2O (HCl salt)

Mol W.

: 296.37,332.80(HClsalt)

Cat No.

: SA17003

Citalopram, Impurities

Citalopram Dihydroxy Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 103146-26-5 (HBr salt); 103146-25-4 (base); 717133-25-0 (HCl Salt)

Mol F.

: C20H28BrFN2O2

Mol W.

: 427.35

Cat No.

: SA17004

Citalopram, Impurities

Citalopram EP Impurity A; Citalopram Related Compound A

Please enquire for price & pack size

In Stock

CAS No.

: 64372-56-1

Mol F.

: C20H23FN2O2

Mol W.

: 342.41

Cat No.

: SA17005

Citalopram, Impurities

Citalopram EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 411221-53-9

Mol F.

: C20H21FN2O2

Mol W.

: 340.39

Cat No.

: SA17006

Citalopram, Impurities

Citalopram EP Impurity C; Citalopram Related Compound C

Please enquire for price & pack size

In Stock

CAS No.

: 1440961-11-4; 372941-54-3 (free base)

Mol F.

: C20H19FN2O2 (base), C22H21FN2O6 (oxalate salt)

Mol W.

: 338.38,428.41(oxalatesalt)

Cat No.

: SA17007

Citalopram, Impurities

Citalopram EP Impurity D

Please enquire for price & pack size

In Stock

CAS No.

: 144025-14-9; 62498-67-3 (Free base)

Mol F.

: C19H20ClFN2O

Mol W.

: 346.83

Cat No.

: SA17008

Citalopram, Impurities

Citalopram EP Impurity G

Please enquire for price & pack size

In Stock

CAS No.

: 1329745-98-3

Mol F.

: C25H33FN2O2

Mol W.

: 412.54

Cat No.

: SA17011

Citalopram, Impurities

Citalopram p-Chlorophenyl Impurity

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C20H21ClN2O

Mol W.

: 340.84

Cat No.

: SA17018

Citalopram, Impurities

Citalopram S-Isomer

Please enquire for price & pack size

In Stock

CAS No.

: 219861-08-2

Mol F.

: C22H23FN2O5

Mol W.

: 414.43

Cat No.

: SA17015

Citalopram, Impurities

Citalopram USP RC E; Citalopram Related Compound E

Please enquire for price & pack size

In Stock

CAS No.

: 63284-72-0

Mol F.

: C20H21FN2O2

Mol W.

: 340.39

Cat No.

: SA17016

Clarithromycin, Impurities

Clarithromycin N-Oxide

Please enquire for price & pack size

In Stock

CAS No.

: 118074-07-0

Mol F.

: C38H69NO14

Mol W.

: 763.95

Cat No.

: SA17203

Clindamycin, Impurities

Clindamycin 2-Phosphate

Please enquire for price & pack size

In Stock

CAS No.

: 24729-96-2

Mol F.

: C18H34ClN2O8PS

Mol W.

: 504.96

Cat No.

: SA29710

Clindamycin, Impurities

Clindamycin EP Impurity D; 7-Epi lincomycin

Please enquire for price & pack size

In Stock

CAS No.

: 17017-22-0

Mol F.

: C18H34N2O6S

Mol W.

: 406.54

Cat No.

: SA29713

Clindamycin, Impurities

Clindamycin Phosphate EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 18323-44-9; 58207-19-5 (hydrochloride hydrate)

Mol F.

: C18H33ClN2O5S

Mol W.

: 424.98

Cat No.

: SA29711

Clindamycin, Impurities

Clindamycin Sulfoxide(Mixture of Diastereomers)

Please enquire for price & pack size

In Stock

CAS No.

: 22431-46-5

Mol F.

: C₁₈H₃₃ClN₂O₆S

Mol W.

: 440.98

Cat No.

: SA29702

Clobetasol Propionate, Impurities

Clobetasol Propionate EP Impurity B

$395.00 25 mg

In Stock

CAS No.

: 1356190-17-4

Mol F.

: C22H26ClFO3

Mol W.

: 392.89

Cat No.

: SA17102

Clobetasol Propionate, Impurities

Clobetasol Propionate EP Impurity C

$155.00 25 mg

In Stock

CAS No.

: 25122-52-5

Mol F.

: C25H32ClFO5

Mol W.

: 466.97

Cat No.

: SA17103

Clobetasol Propionate, Impurities

Clobetasol Propionate EP Impurity D

$155.00 25 mg

In Stock

CAS No.

: 25120-99-4

Mol F.

: C25H34ClFO5

Mol W.

: 468.99

Cat No.

: SA17104

Clobetasol Propionate, Impurities

Clobetasol Propionate EP Impurity G

Please enquire for price & pack size

In Stock

CAS No.

: 25122-41-2

Mol F.

: C22H28ClFO4

Mol W.

: 410.91

Cat No.

: SA17107

Clobetasol Propionate, Impurities

Clobetasol Propionate EP Impurity I

Please enquire for price & pack size

In Stock

CAS No.

: 15423-80-0

Mol F.

: C26H35FO8S

Mol W.

: 526.61

Cat No.

: SA17109

Clobetasol Propionate, Impurities

Clobetasol Propionate EP Impurity J

Please enquire for price & pack size

In Stock

CAS No.

: 1486466-31-2

Mol F.

: C25H30ClFO4

Mol W.

: 448.95

Cat No.

: SA17110

Clomifene, Impurities

Clomiphene EP Impurity G, H (Mixture of Z and EIsomers)

Please enquire for price & pack size

In Stock

CAS No.

: 1795130-18-5

Mol F.

: C26H27Cl2NO

Mol W.

: 440.4

Cat No.

: SA21707

Impurities, Nitrosamine

Clopidogrel Nitroso Impurity

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C7H8N2OS

Mol W.

: 168.2

Cat No.

: SA44618

Clotrimazole, Impurities

Clotrimazole EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 66774-02-5

Mol F.

: C19H15ClO

Mol W.

: 294.77

Cat No.

: SA11601

Clotrimazole, Impurities

Clotrimazole EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 23593-71-7

Mol F.

: C22H17ClN2

Mol W.

: 344.84

Cat No.

: SA11608

Clotrimazole, Impurities

Clotrimazole EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 5162-03-8

Mol F.

: C13H9ClO

Mol W.

: 216.66

Cat No.

: SA11614

Colesevelam, Impurities

Colesevelam Hexamethonium Bromide Impurity

$70.00 25 mg

In Stock

CAS No.

: 55-97-0

Mol F.

: 362.19

Mol W.

: 362.19

Cat No.

: SA10216

Hydrocortisone Valerate, Impurities

Cortisone 17-Valerate

Please enquire for price & pack size

In Stock

CAS No.

: 136370-31-5

Mol F.

: C26H36O6

Mol W.

: 444.56

Cat No.

: SA27302

Cortisone Acetate, Impurities

Cortisone 21-acetate

$95.00 25 mg

In Stock

CAS No.

: 50-04-4

Mol F.

: C23H30O6

Mol W.

: 402.48

Cat No.

: SA43205

Hydrocortisone Valerate, Impurities

Cortisone 21-Valerate

Please enquire for price & pack size

In Stock

CAS No.

: 119698-10-1

Mol F.

: C26H36O6

Mol W.

: 444.56

Cat No.

: SA27301

Hydrocortisone, Impurities

Cortisone hemisuccinate

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C25H34O8

Mol W.

: 462.53

Cat No.

: SA15219

Crisaborole, Impurities

Crisaborole

Please enquire for price & pack size

In Stock

CAS No.

: 906673-24-3

Mol F.

: C14H10BNO3

Mol W.

: 251.05

Cat No.

: SA49600

Cyclobenzaprine, Impurities

Cyclobenzaprine N-Oxide

$150.00 25 mg

In Stock

CAS No.

: 6682-26-4

Mol F.

: C20H21NO

Mol W.

: 291.39

Cat No.

: SA23105