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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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Empagliflozin, Impurities

Empagliflozin Enantiomer Impurity

$325.00 5 mg

In Stock

CAS No.

Mol F.

: C23H27ClO7

Mol W.

: 450.91

Cat No.

: SA15135

Empagliflozin, Impurities

Empagliflozin Furanose alpha Isomer

$355.00 10 mg

In Stock

CAS No.

Mol F.

: C23H27ClO7

Mol W.

: 450.91

Cat No.

: SA15122

Empagliflozin, Impurities

Empagliflozin Furanose Beta Isomer

$135.00 10 mg

In Stock

CAS No.

: 1620758-32-8

Mol F.

: C23H27ClO7

Mol W.

: 450.9

Cat No.

: SA15123

Empagliflozin, Impurities

Empagliflozin Impurity 6

$159.00 10 mg

In Stock

CAS No.

: 1620758-21-5

Mol F.

: C32H37ClO12

Mol W.

: 649.1

Cat No.

: SA15125

Empagliflozin, Impurities

Empagliflozin Impurity 86

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C19H18ClFO6

Mol W.

: 396.79

Cat No.

: SA15151

Empagliflozin, Impurities

Empagliflozin L-Glucono Diastereomer

$245.00 5 mg

In Stock

CAS No.

Mol F.

: C23H27ClO7

Mol W.

: 450.9

Cat No.

: SA15131

Empagliflozin, Impurities

Empagliflozin Monoacetyl Impurity

$135.00 25 mg

In Stock

CAS No.

Mol F.

: C25H29ClO8

Mol W.

: 492.94

Cat No.

: SA15118

Empagliflozin, Impurities

Empagliflozin R/S-Furanose

$258.00 25 mg

In Stock

CAS No.

: 1620758-31-7+1620758-32-8

Mol F.

: C23H27ClO7

Mol W.

: 450.91

Cat No.

: SA15104

Empagliflozin, Impurities

Empagliflozin Silyl Impurity

$205.00 25 mg

In Stock

CAS No.

: 2819995-58-7

Mol F.

: C20H25ClO2Si

Mol W.

: 360.95

Cat No.

: SA15119

Empagliflozin, Impurities

Empagliflozin α-Anomer

$330.00 10 mg

In Stock

CAS No.

: 1620758-33-9

Mol F.

: C23H27ClO7

Mol W.

: 450.91

Cat No.

: SA15105

Emtricitabine, Impurities

Emtricitabine (R)-Sulphoxide Oxide

$165.00 10 mg

In Stock

CAS No.

: 2101981-64-8

Mol F.

: C8H10FN3O4S

Mol W.

: 263.25

Cat No.

: SA22926

Emtricitabine, Impurities

Emtricitabine (S)-Sulphoxide Oxide

$145.00 10 mg

In Stock

CAS No.

: 1160303-44-5

Mol F.

: C8H10FN3O4S

Mol W.

: 263.25

Cat No.

: SA22925

Emtricitabine, Impurities

Emtricitabine cis-Cyclic Impurity

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C8H9FN2O4S

Mol W.

: 248.23

Cat No.

: SA22924

Emtricitabine, Impurities

Emtricitabine Menthyl Ester

$85.00 25 mg

In Stock

CAS No.

: 764659-72-5

Mol F.

: C18H26FN3O4S

Mol W.

: 399.48

Cat No.

: SA22904

Emtricitabine, Impurities

Emtricitabine Sulphoxide Impurity

$175.00 25 mg

In Stock

CAS No.

: 152128-77-3

Mol F.

: C8H10FN3O4S

Mol W.

: 263.25

Cat No.

: SA22923

Emtricitabine, Impurities

Emtricitabine trans-Cyclic Impurity

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C8H9FN2O4S

Mol W.

: 248.23

Cat No.

: SA22900

ENALAPRIL, Impurities

Enalapril Impurity H

Please enquire for price & pack size

In Stock

CAS No.

: 2055735-10-7

Mol F.

: C20H34N2O5

Mol W.

: 382.49

Cat No.

: SA44000

Emtricitabine, Impurities

ent-Emtricitabine; Emtricitabine IP Impurity D

$445.00 25 mg

In Stock

CAS No.

: 137530-41-7

Mol F.

: C₈H₁₀FN₃O₃S

Mol W.

: 247.25

Cat No.

: SA22906

Ezetimibe, Impurities

ent-Ezetimibe; RSR-Ezetimibe

$350.00 25 mg

In Stock

CAS No.

: 1376614-99-1

Mol F.

: C24H21F2NO3

Mol W.

: 409.43

Cat No.

: SA14812

Impurities, Lamivudine

ent-Lamivudine; Lamivudine EP Impurity D

Please enquire for price & pack size

In Stock

CAS No.

: 134680-32-3

Mol F.

: C8H11N3O3S

Mol W.

: 229.26

Cat No.

: SA22307

Impurities, Rosuvastatin

ent-Rosuvastatin tert-Butyl Ester

$550.00 25 mg

In Stock

CAS No.

: 615263-60-0

Mol F.

: C26H36FN3O6S

Mol W.

: 537.64

Cat No.

: SA12149

Entacapone, Impurities

Entacapone EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 1215039-66-9

Mol F.

: C12H10N2O6

Mol W.

: 278.22000000000003

Cat No.

: SA26902

Erlotinib, Impurities

Erlotinib 6-O-Chloroethyl Analog

Please enquire for price & pack size

In Stock

CAS No.

: 183320-04-9

Mol F.

: C21H21Cl2N3O3

Mol W.

: 434.32

Cat No.

: SA25202

Erlotinib, Impurities

Erlotinib Chloro Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 183322-18-1

Mol F.

: C14H17ClN2O4

Mol W.

: 312.75

Cat No.

: SA25207

Erlotinib, Impurities

Erlotinib Hydrochloride

Please enquire for price & pack size

In Stock

CAS No.

: 183319-69-9

Mol F.

: C22H24ClN3O4

Mol W.

: 429.9

Cat No.

: SA25209

Erlotinib, Impurities

Erlotinib imp 3, Erlotinib N-3-bromophenyl Analog

Please enquire for price & pack size

In Stock

CAS No.

: 328528-74-1

Mol F.

: C20H22BrN3O4

Mol W.

: 448.31

Cat No.

: SA25212

Erlotinib, Impurities

Erlotinib impurity H

Please enquire for price & pack size

In Stock

CAS No.

: 183321-85-9

Mol F.

: C21H20ClN3O3

Mol W.

: 397.85

Cat No.

: SA25227

Erlotinib, Impurities

Erlotinib Impurity L

Please enquire for price & pack size

In Stock

CAS No.

: 183321-82-6

Mol F.

: C20H17Cl2N3O2

Mol W.

: 402.28

Cat No.

: SA25218

Erlotinib, Impurities

Erlotinib Impurity M

Please enquire for price & pack size

In Stock

CAS No.

: 183322-21-6

Mol F.

: C12H11Cl3N2O2

Mol W.

: 321.6

Cat No.

: SA25220

Erlotinib, Impurities

Erlotinib Isopropyl ether

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C17H24N2O5

Mol W.

: 336.38

Cat No.

: SA25211

Erlotinib, Impurities

Erlotinib Lactam Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 179688-29-0

Mol F.

: C14H18N2O5

Mol W.

: 294.3

Cat No.

: SA25210

Erlotinib, Impurities

Erlotinibe API (Free Base)

Please enquire for price & pack size

In Stock

CAS No.

: 183321-74-6

Mol F.

: C22H23N3O4

Mol W.

: 393.44

Cat No.

: SA25229

Ertugliflozin, Impurities

Ertugliflozin Hydroxy Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1298086-28-8

Mol F.

: C22H25ClO8

Mol W.

: 452.88200000000001

Cat No.

: SA36806

Ertugliflozin, Impurities

Ertugliflozin Keto Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1298086-37-9

Mol F.

: C22H23ClO8

Mol W.

: 450.86

Cat No.

: SA36807

Ertugliflozin, Impurities

Ertugliflozin Tetraacetate Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 1298086-18-6

Mol F.

: C30H33ClO11

Mol W.

: 605.03

Cat No.

: SA36809

Escitalopram, Impurities

Escitalopram EP Impurity H

Please enquire for price & pack size

In Stock

CAS No.

: 63284-72-0(base);62498-71-9(HClsalt)

Mol F.

: C20H21FN2O2

Mol W.

: 340.39

Cat No.

: SA21208

Escitalopram, Impurities

Escitalopram EP Impurity I

Please enquire for price & pack size

In Stock

CAS No.

: 1370643-22-3(base)

Mol F.

: C20H21FN2O

Mol W.

: 324.39

Cat No.

: SA21209

Esculin, Impurities

Esculin

Please enquire for price & pack size

In Stock

CAS No.

: 531-75-9

Mol F.

: C15H16O9

Mol W.

: 340.28

Cat No.

: SA48100

Eslicarbazepine, Impurities

Eslicarbazepine (R) Acetate

Please enquire for price & pack size

In Stock

CAS No.

: 186694-45-1

Mol F.

: C17H16N2O3

Mol W.

: 296.32

Cat No.

: SA28806

Carbamazepine, Impurities

Eslicarbazepine Acetate

$95.00 25 mg

In Stock

CAS No.

: 236395-14-5

Mol F.

: C1H16N2O3

Mol W.

: 296.32

Cat No.

: SA20339

Eslicarbazepine, Impurities

Eslicarbazepine Dehydro Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 952740-00-0

Mol F.

: C17H14N2O3

Mol W.

: 294.3

Cat No.

: SA28807

Estradiol hemihydrate, Impurities

Estradiol hemihydrate EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 53-16-7

Mol F.

: C18H22O2

Mol W.

: 270.37

Cat No.

: SA14301

Estradiol hemihydrate, Impurities

Estradiol hemihydrate EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 57-91-0

Mol F.

: C₁₈H₂₄O₂

Mol W.

: 272.38

Cat No.

: SA14302

Estradiol hemihydrate, Impurities

Estradiol hemihydrate EP Impurity C

Please enquire for price & pack size

In Stock

CAS No.

: 6171-48-8

Mol F.

: C₁₉H₂₆O₂

Mol W.

: 286.41

Cat No.

: SA14303

Estradiol Valerate, Impurities

Estradiol Valerate EP Impurity F

Please enquire for price & pack size

In Stock

CAS No.

: 18069-79-9

Mol F.

: C22H30O3

Mol W.

: 342.47

Cat No.

: SA14006

Estradiol Valerate, Impurities

Estradiol Valerate EP Impurity H

Please enquire for price & pack size

In Stock

CAS No.

: 1421283-56-8

Mol F.

: C28H40O4

Mol W.

: 440.61

Cat No.

: SA14008

Estradiol Valerate, Impurities

Estradiol Valerate EP Impurity J

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C24H34O3

Mol W.

: 370.52

Cat No.

: SA14010

Ethinylestradiol, Impurities

Ethinylestradiol EP Impurity A

Please enquire for price & pack size

In Stock

CAS No.

: 4717-38-8

Mol F.

: C20H24O2

Mol W.

: 296.41

Cat No.

: SA13107

Ethinylestradiol, Impurities

Ethinylestradiol EP Impurity B

Please enquire for price & pack size

In Stock

CAS No.

: 1231-96-5

Mol F.

: C20H22O2

Mol W.

: 294.39

Cat No.

: SA13101

Ethinylestradiol, Impurities

Ethinylestradiol EP Impurity E

Please enquire for price & pack size

In Stock

CAS No.

: 27521-34-2

Mol F.

: C20H24O3

Mol W.

: 312.4

Cat No.

: SA13102