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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, Terbinafine

1-Bromo-6,6-dimethyl-2-hepten-4-yne

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CAS No.

: 126764-15-6

Mol F.

: C9H13Br

Mol W.

: 201.1

Cat No.

: SA25712

Impurities, Terbinafine

1-Bromopropyn-3-ol

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CAS No.

: 2060-25-5

Mol F.

: C3H3BrO

Mol W.

: 134.96

Cat No.

: SA25713

Dapagliflozin

1-Butyl Dapagliflozin Impurity

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CAS No.

: NA

Mol F.

: C25H33ClO6

Mol W.

: 465.0

Cat No.

: SA150105

Canagliflozin, Impurities

1-C-[3-[[5-(4-Fluorophenyl)-2-thienyl]methyl]-4-methylphenyl]-D-glucose

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CAS No.

: 1809403-04-0

Mol F.

: C24H25FO6S

Mol W.

: 460.5

Cat No.

: SA14926

Dutasteride, Impurities

1-Chloro Dutasteride; Dutasteride EP Impurity F

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CAS No.

: 1365545-42-1

Mol F.

: C27H31ClF6N2O2

Mol W.

: 564.99

Cat No.

: SA35206

Impurities, Ranolazine

1-Chloro-3-(2-methoxyphenoxy)propan-2-ol

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CAS No.

: 25772-81-0

Mol F.

: C10H13ClO3

Mol W.

: 216.66

Cat No.

: SA26813

Impurities, Terbinafine

1-Chloro-6,6-dimethyl-2-heptene-4-yne (90:10 E:Z)

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CAS No.

: 126764-17-8

Mol F.

: C9H13Cl

Mol W.

: 156.65

Cat No.

: SA25715

Citalopram, Impurities

1-Descyano 1-(4-Dimethylamino)oxobutyl Citadiol

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CAS No.

: 1433278-32-0

Mol F.

: C25H35FN2O3

Mol W.

: 430.56

Cat No.

: SA17023

Dapagliflozin, Impurities

1-Hydroxy Dapagliflozin Impurity

$190.00 25 mg

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CAS No.

: 461432-27-9

Mol F.

: C21H25ClO7

Mol W.

: 424.88

Cat No.

: SA15013

Ertugliflozin, Impurities

1-Hydroxy Ertugliflozin Impurity

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CAS No.

Mol F.

: C22H27ClO8

Mol W.

: 454.9

Cat No.

: SA36810

Impurities, Ketorolac

1-Hydroxy Ketorolac; Ketorolac EP Impurity A

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CAS No.

: 154476-25-2

Mol F.

: C14H13NO2

Mol W.

: 227.26

Cat No.

: SA36101

Fingolimod, Impurities

1-Hydroxy Nitro Fingolimod Impurity

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CAS No.

: 899822-99-2

Mol F.

: C19H31NO5

Mol W.

: 353.45

Cat No.

: SA34501

Impurities, Ketorolac

1-Imino Ketorolac Impurity

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CAS No.

: NA

Mol F.

: C14H12N2O

Mol W.

: 224.26

Cat No.

: SA36114

Impurities, Leflunomide

1-Isocyanato-4-(trifluoromethyl)benzene

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CAS No.

: 1548-13-6

Mol F.

: C8H4F3NO

Mol W.

: 187.12

Cat No.

: SA21818

Halcinonide, Impurities

1-Keto Halcinonide

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CAS No.

: NA

Mol F.

: C24H30ClFO6

Mol W.

: 468.94

Cat No.

: SA30407

Impurities, Ketorolac

1-Keto Ketorolac; Ketorolac EP Impurity B

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CAS No.

: 113502-52-6

Mol F.

: C14H11NO2

Mol W.

: 225.24

Cat No.

: SA36102

Dapagliflozin

1-Methoxy Dapagliflozin Enantiomer Dimer

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CAS No.

: NA

Mol F.

: C43H50Cl2O13

Mol W.

: 845.8

Cat No.

: SA150111

Ertugliflozin, Impurities

1-methoxy Ertugliflozin Impurity

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CAS No.

Mol F.

: C23H29ClO8

Mol W.

: 468.92

Cat No.

: SA36804

Impurities, Ketorolac

1-Methoxy Methyl Ester Impurity

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CAS No.

: 2469039-47-0

Mol F.

: C17H17NO4

Mol W.

: 299.32

Cat No.

: SA36111

Canagliflozin, Impurities

1-Methoxy Tetra Acetyl Canagliflozin

$145.00 25 mg

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CAS No.

Mol F.

: C33H35FO10S

Mol W.

: 642.19

Cat No.

: SA14910

Ethinylestradiol, Impurities

1-Methyl Estrone-3-acetate

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CAS No.

: 30903-07-2

Mol F.

: C21H26O3

Mol W.

: 326.43

Cat No.

: SA13135

Impurities, Isavuconazole

1-Methyl-1,4-dihydro-2H-pyrido[2,3-d][1,3]oxazin-2-one

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CAS No.

: 2734004-61-4

Mol F.

: C8H8N2O2

Mol W.

: 164.2

Cat No.

: SA44126

Impurities, Nitrosamine

1-Nitroso-Pyrrolopiperidine

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CAS No.

: NA

Mol F.

: C7H13N3O

Mol W.

: 155.20

Cat No.

: SA446126

Impurities, Nitrosamine

1-Nitrosopiperidin-4-one

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CAS No.

: 55556-91-7

Mol F.

: C5H8N2O2

Mol W.

: 128.13

Cat No.

: SA446124

Impurities, Palbociclib

1-Piperazin-N-oxide Palbociclib

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CAS No.

: 2174002-29-8

Mol F.

: C24H29N7O3

Mol W.

: 463.53

Cat No.

: SA40404

Gemcitabine, Impurities

1-β-D-Arabinofuranosyluracil

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CAS No.

: 3083-77-0

Mol F.

: C9H12N2O6

Mol W.

: 244.2

Cat No.

: SA44519

Azacitidine, Impurities

1-β-D-Ribofuranosyl-3-guanylurea

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CAS No.

: 4336-46-3

Mol F.

: C13H17N7O12

Mol W.

: 463.31

Cat No.

: SA37509

Gabapentin, Impurities

1,1-Cyclohexanediacetic Acid Monoamide

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CAS No.

: 99189-60-3

Mol F.

: C10H17NO3

Mol W.

: 199.25

Cat No.

: SA25408

Impurities, Palbociclib

1,1′-(2-nitropyridine-3,5-diyl)dipiperazine

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CAS No.

Mol F.

: C13H20N6O2

Mol W.

: 292.34

Cat No.

: SA40436

Dutasteride, Impurities

1,2 Dihydro 5,6-Dehydro Dutasteride

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CAS No.

: 164656-21-7

Mol F.

: C27H30F6N2O2

Mol W.

: 528.53

Cat No.

: SA35210

Gemcitabine, Impurities

1,2-Bis(2,2-dimethyl-4H-1,3-dioxin-6-yl)ethane-1,2-diol

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CAS No.

: NA

Mol F.

: C14H22O6

Mol W.

: 286.32

Cat No.

: SA44512

Dutasteride, Impurities

1,2-Dihydro 17-(2,5-Trifluoro Phenyl Benzoate) Dutasteride Impurity

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CAS No.

: NA

Mol F.

: C27H31F6NO3

Mol W.

: 531.53

Cat No.

: SA35218

Dutasteride, Impurities

1,2-Dihydro 17-carboxylic acid dutastride impurity

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CAS No.

: 103335-55-3

Mol F.

: C19H29NO3

Mol W.

: 319.44

Cat No.

: SA35215

Dutasteride, Impurities

1,2-Dihydro 17-Carboxylic Methy Ester Dutastride impurity

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CAS No.

: NA

Mol F.

: C20H31NO3

Mol W.

: 333.46

Cat No.

: SA35216

Dutasteride, Impurities

1,2-Dihydro 17-Epi-(2,5-Trifluoro Phenyl Benzoate) Dutasteride Impurity

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CAS No.

: NA

Mol F.

: C27H31F6NO3

Mol W.

: 531.53

Cat No.

: SA35217

Dutasteride, Impurities

1,2-Dihydro 17-Epimer Dutasteride Impurity

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CAS No.

: NA

Mol F.

: C27H32F6N2O2

Mol W.

: 530.54

Cat No.

: SA35220

Impurities, Prednisolone

1,2-Dihydro Prednicarbate

$695.00 25 mg

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CAS No.

: 671225-26-6

Mol F.

: C27H38O8

Mol W.

: 490.58

Cat No.

: SA16706

Beclomethasone Dipropionate, Impurities

1,2-Dihydro-6,7-dehydrobeclometasone Dipropopionate

$255.00 25 mg

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CAS No.

Mol F.

: C28H37ClO7

Mol W.

: 521.04

Cat No.

: SA15607

Impurities, Triamcinolone Acetonide

1,2-DihydroTriamcinolone-16,17-Acetonide-21-Mesylate

$295.00 50 mg

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CAS No.

: 2367-73-9

Mol F.

: C25H35FO8S

Mol W.

: 514.6

Cat No.

: SA30217

Canagliflozin, Impurities

1,2-Dihydroxyethyl)-4-methylphenyl)tetrahydrofuran-3,4-diol

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CAS No.

Mol F.

: C24H25FO5S

Mol W.

: 444.52

Cat No.

: SA14927

Ezetimibe, Impurities

1,2-Seco-ezetimibe-δ-lactone

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CAS No.

Mol F.

: C24H21F2NO3

Mol W.

: 409.42

Cat No.

: SA14841

Argatroban, Impurities

1,2,3,4-Tetradehydro Argatroban

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CAS No.

: 951130-92-0

Mol F.

: C23H32N6O5S

Mol W.

: 504.6

Cat No.

: SA48415

Impurities, Isoquinoline

1,2,3,4-Tetrahydro-4,6-dihydroxy-2-methylisoquinoline HCl

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CAS No.

: 57196-61-9

Mol F.

: C10H14ClNO2

Mol W.

: 215.6

Cat No.

: SA19305

Aripiprazole, Impurities

1,2,4-Trichlorobenzene | CAS : 120-82-1

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CAS No.

: 120-82-1

Mol F.

: C6H3Cl3

Mol W.

: 181.4

Cat No.

: SA24033

Impurities, Ritlecitinib

1,3-bis((2S,5R)-5-(7H-pyrrolo[2,3-d]pyrimidin-4-ylamino)-2-methylpiperidin-1-yl)propan-1-one

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CAS No.

Mol F.

: C27H36N10O

Mol W.

: 516.64

Cat No.

: SA50007

Impurities, Trazodone

1,3-bis(4-(3-chlorophenyl)piperazin-1-yl)propane

$655.00 100 mg

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CAS No.

: 6323-09-7(base)

Mol F.

: C23H30Cl2N4

Mol W.

: 433.42

Cat No.

: SA30308

Impurities, Ritlecitinib

1,3-bis(6-methylpyridin-3-yl)urea

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CAS No.

Mol F.

: C13H14N4O

Mol W.

: 242.28

Cat No.

: SA50001

Impurities, Pazopanib

1,3-Dimethyl-6-nitro-1H-indazole

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CAS No.

: 1354224-47-7

Mol F.

: C9H9N3O2

Mol W.

: 191.2

Cat No.

: SA51315

Exemestane, Impurities

1,4-Androstadiene-3,17-dione

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CAS No.

: 897-06-3

Mol F.

: C19H24O2

Mol W.

: 284.39

Cat No.

: SA19118

Empagliflozin, Impurities

1,4-Anhydro-1,5-dihydroxy-1-methoxyempagliflozin

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CAS No.

: 1620758-25-9

Mol F.

: C24H29ClO8

Mol W.

: 480.93

Cat No.

: SA15108