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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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Fluocinonide, Impurities

Fluocinolone Acetonide EP Impurity I

Please enquire for price & pack size

Limited Stock

CAS No.

: NA

Mol F.

: C24H28F2O6

Mol W.

: 450.47

Cat No.

: SA35409

Flurbiprofen, Impurities

Flurbiprofen EP Impurity C

Please enquire for price & pack size

Limited Stock

CAS No.

: 61466-95-3

Mol F.

: C15H13FO3

Mol W.

: 260.27

Cat No.

: SA14604

Febuxostat, Impurities

Formyl febuxostat impurity

Please enquire for price & pack size

Limited Stock

CAS No.

: 144060-62-8

Mol F.

: C₁₆H₁₇NO₄S

Mol W.

: 319.38

Cat No.

: SA32008

Glipizide, Impurities

Glipizide EP Impurity A

Please enquire for price & pack size

Limited Stock

CAS No.

: 33288-71-0

Mol F.

: C„H†N„OƒS

Mol W.

: 320.37

Cat No.

: SA38601

Glyburide, Impurities

Glyburide USP Related Compound A

Please enquire for price & pack size

Limited Stock

CAS No.

: 16673-34-0

Mol F.

: C₁₆H₁₇ClN₂O₄S

Mol W.

: 368.84

Cat No.

: SA12303

Hydrocortisone, Impurities

Hydrocortisone 3-Methyl Enol Ether Impurity

Please enquire for price & pack size

Limited Stock

CAS No.

Mol F.

: C22H32O5

Mol W.

: 376.49

Cat No.

: SA15221

Hydrocortisone Acetate, Impurities

Hydrocortisone Acetate EP Impurity G

Please enquire for price & pack size

Limited Stock

CAS No.

: 81968-66-3

Mol F.

: C25H34O7

Mol W.

: 446.53

Cat No.

: SA45701

Hydrocortisone, Impurities

Hydrocortisone EP Impurity D

$255.00 25 mg

Limited Stock

CAS No.

: 53-35-0

Mol F.

: C21H30O6

Mol W.

: 378.46

Cat No.

: SA15205

Hydrocortisone Valerate, Impurities

Hydrocortisone-21-aldehyde, 17-valerate

Please enquire for price & pack size

Limited Stock

CAS No.

: NA

Mol F.

: C26H36O6

Mol W.

: 444.56

Cat No.

: SA27304

Hydroxychloroquine, Impurities

Hydroxychloroquine-O-Acetate

Please enquire for price & pack size

Limited Stock

CAS No.

: 47493-14-1

Mol F.

: C20H28ClN3O2

Mol W.

: 377.91

Cat No.

: SA23800

Hydroxyprogesterone Caproate, Impurities

Hydroxyprogesterone Caproate impurity B

Please enquire for price & pack size

Limited Stock

CAS No.

: 630-56-8

Mol F.

: C26H38O4

Mol W.

: 414.58

Cat No.

: SA18201

Hydroxyprogesterone Caproate, Impurities

Hydroxyprogesterone Caproate impurity C

Please enquire for price & pack size

Limited Stock

CAS No.

: NA

Mol F.

: C27H38O4

Mol W.

: 426.59

Cat No.

: SA18202

Hydroxyprogesterone Caproate, Impurities

Hydroxyprogesterone Caproate impurity D

Please enquire for price & pack size

Limited Stock

CAS No.

: 4596-16-1

Mol F.

: C28H42O4

Mol W.

: 442.63

Cat No.

: SA18203

Impurities, Indacaterol

Indacaterol O-Benzyl Impurity

Please enquire for price & pack size

Limited Stock

CAS No.

: 435273-75-9

Mol F.

: C31H34N2O3

Mol W.

: 482.61

Cat No.

: SA48705

Impurities, Levonorgestrel

Levonorgestrel EP Impurity G

Please enquire for price & pack size

Limited Stock

CAS No.

: 87585-03-3

Mol F.

: C₂₁H₂₈O₃

Mol W.

: 328.45

Cat No.

: SA23710

Impurities, Levonorgestrel

Levonorgestrel EP Impurity I

Please enquire for price & pack size

Limited Stock

CAS No.

: 20402-62-4

Mol F.

: C21H28O3

Mol W.

: 328.45

Cat No.

: SA23712

Impurities, Linagliptin

Linagliptin Impurity 4

Please enquire for price & pack size

Limited Stock

CAS No.

Mol F.

: C35H36N10O2

Mol W.

: 628.73

Cat No.

: SA49937

Colesevelam, Impurities

Methoxyquat Bromide

$150.00 25 mg

Limited Stock

CAS No.

: 359436-97-8

Mol F.

: C10H24BrNO

Mol W.

: 254.21

Cat No.

: SA10210

Impurities, Methylprednisolone Acetate

Methylprednisolone Acetate EP Impurity G

$125.00 25 mg

Limited Stock

CAS No.

: 1625-11-2

Mol F.

: C24H34O6

Mol W.

: 418.52

Cat No.

: SA25006

Impurities, Methylprednisolone

Methylprednisolone EP Impurity B

$125.00 25 mg

Limited Stock

CAS No.

: 58636-50-3

Mol F.

: C22H30O6

Mol W.

: 390.47

Cat No.

: SA14405

Impurities, Methylprednisolone

Methylprednisolone EP Impurity F

$125.00 25 mg

Limited Stock

CAS No.

: 1625-39-4

Mol F.

: C22H32O5

Mol W.

: 376.49

Cat No.

: SA14407

Impurities, Midazolam

Midazolam EP Impurity J

Please enquire for price & pack size

Limited Stock

CAS No.

: 59469-08-8

Mol F.

: C18H17ClFN3

Mol W.

: 329.8

Cat No.

: SA44302

Impurities, Milnacipran

Milnacipran EP Impurity D

Please enquire for price & pack size

Limited Stock

CAS No.

: 60788-55-8

Mol F.

: C11H11NO

Mol W.

: 173.21

Cat No.

: SA24303

Impurities, Mometasone

Mometasone Furoate EP Impurity E

$295.00 25 mg

Limited Stock

CAS No.

: 1370190-33-2

Mol F.

: C₃₂H₃₂Cl₂O₈

Mol W.

: 615.5

Cat No.

: SA28705

Impurities, Linezolid

N-(3-(3-fluoro-4-morpholinophenylamino)propyl)-N-(((S)-3-(3-fluoro-4-morpholionphenyl)-2-oxo-5-oxazolidinyl) methyl)amine

Please enquire for price & pack size

Limited Stock

CAS No.

Mol F.

: C27H35F2N5O4

Mol W.

: 531.59

Cat No.

: SA17504

Cinacalcet, Impurities

N-(4-Benzyl trifluoromethyl) Cinacalcet Impurities

Please enquire for price & pack size

Limited Stock

CAS No.

: NA

Mol F.

: C20H18F3N

Mol W.

: 329.36

Cat No.

: SA34214

Impurities, Linezolid

N-acetyl-(3-(3-fluoro-4-morpholinophenylamino)propyl)-N-(((S)3-(3-fluoro-4-morpholionphenyl)-2-oxo-5-oxazolidinyl) methyl)acetamide

Please enquire for price & pack size

Limited Stock

CAS No.

Mol F.

: C31H39F2N5O6

Mol W.

: 615.67

Cat No.

: SA17503

Cabergoline, Impurities

N-Desallyl-N-Nitroso Cabergoline Impurity

Please enquire for price & pack size

Limited Stock

CAS No.

Mol F.

: C23H32N6O3

Mol W.

: 440.54

Cat No.

: SA51803

Impurities, Sitagliptin

N,N’-(ethane-1,2-diyl)bis(3-amino-4-(2,4,5-trifluorophenyl)butanamide)dihydrochloride

$395.00 25 mg

Limited Stock

CAS No.

Mol F.

: C22H26Cl2F6N4O2

Mol W.

: 563.39

Cat No.

: SA10450

Impurities, Naproxen

Naproxen EP Impurity A

$125.00 25 mg

Limited Stock

CAS No.

: 52079-10-4

Mol F.

: C13H12O3

Mol W.

: 216.24

Cat No.

: SA20401

Impurities, Nebivolol

Nebivolol Desfluoro

Please enquire for price & pack size

Limited Stock

CAS No.

: 129101-34-4

Mol F.

: C22H26FNO4

Mol W.

: 387.44

Cat No.

: SA14701

Impurities, Nizatidine

Nizatidine EP Impurity D

Please enquire for price & pack size

Limited Stock

CAS No.

: 78441-62-0

Mol F.

: C9H17N3S2

Mol W.

: 231.38

Cat No.

: SA34404

Impurities, Naloxone

Noroxymorphone

Please enquire for price & pack size

Limited Stock

CAS No.

: 33522-95-1

Mol F.

: C16H17NO4

Mol W.

: 287.31

Cat No.

: SA45111

Impurities, Naloxone

O-Propyl Naloxone Enol Ether

Please enquire for price & pack size

Limited Stock

CAS No.

: NA

Mol F.

: C22H27NO4

Mol W.

: 369.45

Cat No.

: SA45102

Impurities, Olmesartan Medoxomil

OMJ2 ethyl methyl impurity

$295.00 25 mg

Limited Stock

CAS No.

Mol F.

: C49H46N6O6

Mol W.

: 814.92

Cat No.

: SA17708

Impurities, Olmesartan Medoxomil

OMJ2 ethyl methyl impurity (N2)

$295.00 25 mg

Limited Stock

CAS No.

Mol F.

: C49H46N₆O₆

Mol W.

: 814.92

Cat No.

: SA17709

Impurities, Oxcarbazepine

Oxcarbazepine EP Impurity G

$295.00 25 mg

Limited Stock

CAS No.

: 15882-79-8

Mol F.

: C17H17N

Mol W.

: 251.32

Cat No.

: SA12510

Impurities, Pemetrexed

Pemetrexed EP impurity B & C mixture (1:1)

Please enquire for price & pack size

Limited Stock

CAS No.

: 1644286-34-9

Mol F.

: C40H40N10O13

Mol W.

: 868.82

Cat No.

: SA32322

Diclofenac, Impurities

PPG-1 and PPG-2

Please enquire for price & pack size

Limited Stock

CAS No.

Mol F.

Mol W.

Cat No.

: SA11401

Impurities, Prazosin

Prazosin EP Impurity E

Please enquire for price & pack size

Limited Stock

CAS No.

: 102839-00-9

Mol F.

: C24H28N8O4

Mol W.

: 492.53

Cat No.

: SA24204

Impurities, Prednisolone

Prednisolone EP Impurity J

$395.00 25 mg

Limited Stock

CAS No.

: 1807-14-3

Mol F.

: C21H28O4

Mol W.

: 344.45

Cat No.

: SA16709

Impurities, Prochlorperazine Maleate

Prochlorperazine Maleate Degradant V

Please enquire for price & pack size

Limited Stock

CAS No.

: 58-38-8

Mol F.

: C20H24ClN3OS

Mol W.

: 389.94

Cat No.

: SA45602

Impurities, Prochlorperazine Maleate

Prochlorperazine Related Compound A

Please enquire for price & pack size

Limited Stock

CAS No.

: 1346602-34-3

Mol F.

: C20H24ClN3S

Mol W.

: 373.94

Cat No.

: SA45603

Impurities, Progesterone

Progesterone EP Impurity G

Please enquire for price & pack size

Limited Stock

CAS No.

: 2257421-79-5

Mol F.

: C27H38O2

Mol W.

: 394.59

Cat No.

: SA18005

Abacavir, Impurities

Pyrimidine Dimer Derivative

$595.00 25 mg

Limited Stock

CAS No.

Mol F.

: C16H17ClN9O3

Mol W.

: 454.27

Cat No.

: SA18122

Impurities, Raloxifene

Raloxifene N-Oxide

Please enquire for price & pack size

Limited Stock

CAS No.

: 195454-31-0

Mol F.

: C28H27NO5S

Mol W.

: 489.58

Cat No.

: SA24907

Impurities, Rilpivirine

Rilpivirine N-Oxide

Please enquire for price & pack size

Limited Stock

CAS No.

: NA

Mol F.

: C22H18N6O

Mol W.

: 382.42

Cat No.

: SA25400

Impurities, Rivaroxaban

Rivaroxaban Enantiomer (R-Isomer)

$100.00 25 mg

Limited Stock

CAS No.

: 865479-71-6

Mol F.

: C19H18ClN3O5S

Mol W.

: 435.88

Cat No.

: SA18601

Impurities, Rivaroxaban

Rivaroxaban Impurity A

$550.00 25 mg

Limited Stock

CAS No.

Mol F.

: C₂₈H₃₁N₅O₈

Mol W.

: 565.57

Cat No.

: SA18616

Impurities, Rosuvastatin

Rosuvastatin (6S)-Lactone Impurity

$650.00 25 mg

Limited Stock

CAS No.

: 854898-47-8

Mol F.

: C22H26FN3O5S

Mol W.

: 463.52

Cat No.

: SA12182

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.

Fluocinonide, Impurities

Fluocinolone Acetonide EP Impurity I

CAS No.

: NA

Mol F.

: C24H28F2O6

Mol W.

: 450.47

Cat No.

: SA35409

Flurbiprofen, Impurities

Flurbiprofen EP Impurity C

CAS No.

: 61466-95-3

Mol F.

: C15H13FO3

Mol W.

: 260.27

Cat No.

: SA14604

Febuxostat, Impurities

Formyl febuxostat impurity

CAS No.

: 144060-62-8

Mol F.

: C₁₆H₁₇NO₄S

Mol W.

: 319.38

Cat No.

: SA32008

Glipizide, Impurities

Glipizide EP Impurity A

CAS No.

: 33288-71-0

Mol F.

: C„H†N„OƒS

Mol W.

: 320.37

Cat No.

: SA38601

Glyburide, Impurities

Glyburide USP Related Compound A

CAS No.

: 16673-34-0

Mol F.

: C₁₆H₁₇ClN₂O₄S

Mol W.

: 368.84

Cat No.

: SA12303

Hydrocortisone, Impurities

Hydrocortisone 3-Methyl Enol Ether Impurity

CAS No.

Mol F.

: C22H32O5

Mol W.

: 376.49

Cat No.

: SA15221

Hydrocortisone Acetate, Impurities

Hydrocortisone Acetate EP Impurity G

CAS No.

: 81968-66-3

Mol F.

: C25H34O7

Mol W.

: 446.53

Cat No.

: SA45701

Hydrocortisone, Impurities

Hydrocortisone EP Impurity D

CAS No.

: 53-35-0

Mol F.

: C21H30O6

Mol W.

: 378.46

Cat No.

: C„H†N„OƒS