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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.

ABCDEFGHIJKLMNOPQRSTUVWXYZ
SA46219

,

((2R,3S,4R,5R)-3,4-dihydroxy- 5-((E)-(4-(hydroxyamino)-2- oxo-3,4-dihydropyrimidin- 1(2H)-yl)tetrahydrofuran-2- yl)methyl isobutyrate
Please enquire for price & pack size
In Stock

CAS No.

: 2492423-30-8

Mol F.

: C13H19N3O7

Mol W.

: 329.31

Cat No.

: SA46219

SA14825

,

((S)-4-Phenyloxazolidin-2-one)
$70.00 25 mg
In Stock

CAS No.

: 99395-88-7

Mol F.

: C9H9NO2

Mol W.

: 163.18

Cat No.

: SA14825

SA11713

,

(−)-Scopolamine hydrobromide trihydrate
$100.00 25 mg
In Stock

CAS No.

: 6533-68-2

Mol F.

: C17H28BrNO7

Mol W.

: 438.31

Cat No.

: SA11713

SA45415

,

(1’R,2S,3R)-Fosaprepitant Dimeglumine
$850.00 25 mg
In Stock

CAS No.

Mol F.

: C37H56F7N6O16P

Mol W.

: 1004.83

Cat No.

: SA45415

SA45416 1

,

(1’S,2R,3S)-Fosaprepitant Dimeglumine
$850.00 25 mg
In Stock

CAS No.

Mol F.

: C37H56F7N6O16P

Mol W.

: 1004.83

Cat No.

: SA45416

SA13437

,

(17α)-19-Norpregn-5-en-20-yne-3,17-diol
Please enquire for price & pack size
In Stock

CAS No.

: 1492-41-7

Mol F.

: C20H28O2

Mol W.

: 300.44

Cat No.

: SA13437

SA13206

,

(17β)-3,17-Bis[(tetrahydro-2H-pyran-2-yl)oxy]-estra-1,3,5(10)-trien-6-ol
Please enquire for price & pack size
In Stock

CAS No.

: 122566-22-7

Mol F.

: C₂₈H₄₀O₅

Mol W.

: 456.61

Cat No.

: SA13206

SA45425

,

(1R, 2R, 3S) Fosaprepitant Dimeglumine
Please enquire for price & pack size
In Stock

CAS No.

: 265121-04-8

Mol F.

: C37H56F7N6O16P (Dimeglumine salt)

Mol W.

: 1004.83

Cat No.

: SA45425

SA20903

,

(1R, 3S) Methyl ester Tadalafil Impurity
Please enquire for price & pack size
In Stock

CAS No.

: 171596-44-4

Mol F.

: C₂₀H₁₈N₂O₄

Mol W.

: 350.37

Cat No.

: SA20903

SA20906

,

(1R, 3S) Open Ring Tadalafil Impurity
Please enquire for price & pack size
In Stock

CAS No.

: 629652-44-4

Mol F.

: C₂₂H₁₉ClN₂O₅

Mol W.

: 426.85

Cat No.

: SA20906

SA22318

,

(1R,2S,5R)-2-isopropyl-5-methylcyclohexyl(2R,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-1,3-oxathiolane-2-carboxylate
Please enquire for price & pack size
In Stock

CAS No.

: 147126-80-5

Mol F.

: C18H27N3O4S

Mol W.

: 381.5

Cat No.

: SA22318

SA22319

,

(1R,2S,5R)-2-isopropyl-5-methylcyclohexyl(2S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-1,3-oxathiolane-2-carboxylate
Please enquire for price & pack size
In Stock

CAS No.

: 200396-21-0

Mol F.

: C18H27N3O4S

Mol W.

: 381.5

Cat No.

: SA22319

SA22320

,

(1R,2S,5R)-2-isopropyl-5-methylcyclohexyl(2S,5S)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-1,3-oxathiolane-2-carboxylate
Please enquire for price & pack size
In Stock

CAS No.

: NA

Mol F.

: C18H27N3O4S

Mol W.

: 381.5

Cat No.

: SA22320

SA15112

,

(1R)-1,5-Dihydroxyempagliflozin
$126.00 10 mg
In Stock

CAS No.

: 1620758-34-0

Mol F.

: C23H29ClO8

Mol W.

: 468.92

Cat No.

: SA15112

SA20901

,

(1S-cis) Methyl ester Tadalafil Impurity
Please enquire for price & pack size
In Stock

CAS No.

: 171596-43-3

Mol F.

: C₂₀H₁₈N₂O₄

Mol W.

: 350.37

Cat No.

: SA20901

SA20902

,

(1S, 3R) Methyl ester Tadalafil Impurity
Please enquire for price & pack size
In Stock

CAS No.

: 171596-42-2

Mol F.

: C20H18N2O4

Mol W.

: 350.37

Cat No.

: SA20902

SA20905

,

(1S, 3R) Open Ring Tadalafil Impurity
Please enquire for price & pack size
In Stock

CAS No.

: 629652-40-0

Mol F.

: C₂₂H₁₉ClN₂O₅

Mol W.

: 426.85

Cat No.

: SA20905

SA33028

,

(1S,3R,4R)-ethyl 3-azido-4- hydroxycyclohexanecarboxylate
Please enquire for price & pack size
In Stock

CAS No.

: 365997-32-6

Mol F.

: C9H15N3O3

Mol W.

: 213.23

Cat No.

: SA33028

SA33027

,

(1S,3R,4S)-4-azido-3-(tertbutoxycarbonylamino) cyclohexane carboxylic acid
Please enquire for price & pack size
In Stock

CAS No.

: 365997-67-7

Mol F.

: C12H20N4O4

Mol W.

: 284.31

Cat No.

: SA33027

SA44106

,

(2-(Methylamino)pyridin-3- yl)methanol
$90.00 50 mg
In Stock

CAS No.

: 32399-12-5

Mol F.

: C7H10N2O

Mol W.

: 138.17

Cat No.

: SA44106

SA15116

,

(2-Chloro-5-iodophenyl)(4-fluorophenyl)methanone
Please enquire for price & pack size
In Stock

CAS No.

: 915095-86-2

Mol F.

: C13H7ClFIO

Mol W.

: 360.55

Cat No.

: SA15116

SA15117

,

(2-Chloro-5-iodophenyl)[4-[[(3S)-tetrahydro-3-furanyl]oxy]phenyl]methanone
Please enquire for price & pack size
In Stock

CAS No.

: 915095-87-3

Mol F.

: C17H14ClIO3

Mol W.

: 428.65

Cat No.

: SA15117

SA23615

,

(2R,3R)-2-(2,4-difluorophenyl)-1-(1H-1,2,4-triazol-1-yl)butane-2,3-diol
$95.00 25 mg
In Stock

CAS No.

: 133775-25-4

Mol F.

: C12H13F2N3O2

Mol W.

: 269.25

Cat No.

: SA23615

SA44122

,

(2R,3R)-3-(2,5-difluorophenyl)- 3-hydroxy-2-methyl-4-(1H- 1,2,4-triazol-1-yl)butanamide
$550.00 25 mg
In Stock

CAS No.

Mol F.

: C13H14F2N4O2

Mol W.

: 296.27

Cat No.

: SA44122

SA44102

,

(2R,3R)-3-(2,5-difluorophenyl)-3-hydroxy-2-methyl-4-(1H-1,2,4-triazol-1-yl)butanenitrile
$400.00 25 mg
In Stock

CAS No.

: 2001052-01-1

Mol F.

: C13H12F2N4O

Mol W.

: 278.26

Cat No.

: SA44102

SA44112

,

(2R,3R)-3-(2,5-difluorophenyl)-3-hydroxy-2-methyl-4-(1H-1,2,4-triazol-1-yl)butanethioamide
Please enquire for price & pack size
In Stock

CAS No.

: 368421-58-3

Mol F.

: C13H14F2N4OS

Mol W.

: 312.34

Cat No.

: SA44112

SA44131

,

(2R,3R)-Isavuconazole Diol
Please enquire for price & pack size
In Stock

CAS No.

: 241479-72-1

Mol F.

: C12H13F2N3O2

Mol W.

: 269.25

Cat No.

: SA44131

SA44101

,

(2R,3S)-3-(2,5-difluorophenyl)-3-hydroxy-2-methyl-4-(1H-1,2,4-triazol-1-yl)butanenitrile
$590.00 25 mg
In Stock

CAS No.

: 2069200-13-9

Mol F.

: C13H12F2N4O

Mol W.

: 278.26

Cat No.

: SA44101

SA44114

,

(2R,3S)-3-(2,5-difluorophenyl)-3-hydroxy-2-methyl-4-(1H-1,2,4-triazol-1-yl)butanethioamide
$750.00 25 mg
In Stock

CAS No.

: 170863-34-0

Mol F.

: C13H14F2N4OS

Mol W.

: 312.34

Cat No.

: SA44114

SA23622

,

(2R,3S)-Efinaconazole Diol
Please enquire for price & pack size
In Stock

CAS No.

Mol F.

: C12H13F2N3O2

Mol W.

: 269.25

Cat No.

: SA23622

SA44132

,

(2R,3S)-Isavuconazole Diol
Please enquire for price & pack size
In Stock

CAS No.

Mol F.

: C12H13F2N3O2

Mol W.

: 269.25

Cat No.

: SA44132

SA22918

,

(2R,5R) Emtricitabine Menthyl Ester
$195.00 5 mg
In Stock

CAS No.

: 1773498-61-5

Mol F.

: C18H26FN3O4S

Mol W.

: 399.48

Cat No.

: SA22918

SA22927

,

(2R,5R)-((1R,2S,5R)-2-isopropyl-5-methylcyclohexyl) 5-(4-benzamido-5-fluoro-2-oxopyrimidin-1(2H)-yl)-1,3-oxathiolane-2-carboxylate
Please enquire for price & pack size
In Stock

CAS No.

: NA

Mol F.

: C25H30FN3O5S

Mol W.

: 503.59

Cat No.

: SA22927

SA22914

,

(2R,5S) Emtricitabine Carboxylic Acid
$125.00 25 mg
In Stock

CAS No.

: 1238210-10-0

Mol F.

: C8H8FN3O4S

Mol W.

: 261.23

Cat No.

: SA22914

SA23614

,

(2R)-1-(2,4-Difluorophenyl)-2-((tetrahydro-2H-pyran-2-yl)oxy)propan-1-one
$95.00 25 mg
In Stock

CAS No.

: 126918-17-0

Mol F.

: C14H16F2O3

Mol W.

: 270.27

Cat No.

: SA23614

SA19511

,

(2S-trans)-Diltiazem; Diltiazem EP Impurity A
Please enquire for price & pack size
In Stock

CAS No.

: 103532-26-9; 111188-70-6

Mol F.

: C22H26N2O4S

Mol W.

: 414.52

Cat No.

: SA19511

SA23624

,

(2S,3R) Efinaconazole Epoxide
Please enquire for price & pack size
In Stock

CAS No.

: 135270-07-4

Mol F.

: C12H11F2N3O

Mol W.

: 251.24

Cat No.

: SA23624

SA44128

,

(2S,3R)-3-(2-fluorophenyl)-3-hydroxy-2-methyl-4-(1H-1,2,4-triazol-1-yl)butanenitrile
Please enquire for price & pack size
In Stock

CAS No.

Mol F.

: C13H13FN4O

Mol W.

: 260.27

Cat No.

: SA44128

SA23621

,

(2S,3R)-3-(2,4-difluorophenyl)- 3-hydroxy-2-methyl-4-(1H- 1,2,4-triazol-1-yl)butanenitrile
Please enquire for price & pack size
In Stock

CAS No.

Mol F.

: C13H12F2N4O

Mol W.

: 278.26

Cat No.

: SA23621

SA23616

,

(2S,3R)-3-(2,5-difluorophenyl)-3- hydroxy-2-methyl-4-(1H-1,2,4-triazol-1- yl)butanenitrile
$95.00 25 mg
In Stock

CAS No.

: 241479-74-3

Mol F.

: C13H12F2N4O

Mol W.

: 278.26

Cat No.

: SA23616

SA44111

,

(2S,3R)-3-(2,5-difluorophenyl)-3-hydroxy-2-methyl-4-(1H-1,2,4-triazol-1-yl)butanethioamide
$750.00 25 mg
In Stock

CAS No.

: 2170932-49-5

Mol F.

: C13H14F2N4OS

Mol W.

: 312.34

Cat No.

: SA44111

SA44123

,

(2S,3R)-3-hydroxy-2-methyl-3- phenyl-4-(1H-1,2,4-triazol-1- yl)butanenitrile
Please enquire for price & pack size
In Stock

CAS No.

Mol F.

: C13H14N4O

Mol W.

: 242.28

Cat No.

: SA44123

SA44121

,

(2S,3R)-4-cyclopentyl-3-hydroxy-2-methyl-3-phenylbutanenitrile
Please enquire for price & pack size
In Stock

CAS No.

: NA

Mol F.

: C16H21NO

Mol W.

: 243.34

Cat No.

: SA44121

SA23620

,

(2S,3R)-Efinaconazole Diol
Please enquire for price & pack size
In Stock

CAS No.

Mol F.

: C12H13F2N3O2

Mol W.

: 269.25

Cat No.

: SA23620

SA23617

,

(2S,3S)-2-(2,5-difluorophenyl)-1-(1H- 1,2,4-triazol-1-yl)butane-2,3-diol
Please enquire for price & pack size
In Stock

CAS No.

: NA

Mol F.

: C12H13F2N3O2

Mol W.

: 269.25

Cat No.

: SA23617

SA44103

,

(2S,3S)-3-(2,5-Difluorophenyl)-3-hydroxy-2-methyl-4-(1H-1,2,4-triazol -1-yl)butanenitrile
$550.00 25 mg
In Stock

CAS No.

: 2001051-99-4

Mol F.

: C13H12F2N4O

Mol W.

: 278.26

Cat No.

: SA44103

SA44113

,

(2S,3S)-3-(2,5-difluorophenyl)-3-hydroxy-2-methyl-4-(1H-1,2,4-triazol-1-yl)butanethioamide
$750.00 25 mg
In Stock

CAS No.

Mol F.

: C13H14F2N4OS

Mol W.

: 312.34

Cat No.

: SA44113

SA22916

,

(2S,5R) Emtricitabine Menthyl Ester
$195.00 5 mg
In Stock

CAS No.

: 147126-75-8

Mol F.

: C18H26FN3O4S

Mol W.

: 399.48

Cat No.

: SA22916

SA22917

,

(2S,5S) Emtricitabine Menthyl Ester
$195.00 5 mg
In Stock

CAS No.

: 147027-01-8

Mol F.

: C18H26FN3O4S

Mol W.

: 399.48

Cat No.

: SA22917

SA14802

(3’R)-Ezetimibe; RRS-Ezetimibe
$120.00 10 mg
In Stock

CAS No.

: 163380-16-3

Mol F.

: C24H21F2NO3

Mol W.

: 409.43

Cat No.

: SA14802

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