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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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Emtricitabine, Impurities

Emtricitabine Uracil Impurity

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CAS No.

: 1422361-25-8

Mol F.

: C18H25FN2O5S

Mol W.

: 400.46

Cat No.

: SA22932

ENALAPRIL, Impurities

Enalapril 2-Chlorophenyl Impurity | CAS : 85918-76-9

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CAS No.

: 85918-76-9

Mol F.

: C20H27ClN2O5

Mol W.

: 410.9

Cat No.

: SA44001

ENALAPRIL, Impurities

Enalapril 4-Chlorophenyl Impurity

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CAS No.

: NA

Mol F.

: C20H27ClN2O5

Mol W.

: 410.89

Cat No.

: SA44002

ENALAPRIL, Impurities

Enalapril EP Impurity A

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CAS No.

: 76420-74-1

Mol F.

: C20H28N2O5

Mol W.

: 376.5

Cat No.

: SA44006

ENALAPRIL, Impurities

Enalapril EP Impurity D | CAS : 115729-52-7

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CAS No.

: 115729-52-7

Mol F.

: C20H26N2O4

Mol W.

: 358.4

Cat No.

: SA44004

ENALAPRIL, Impurities

Enalapril EP Impurity G

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CAS No.

: 460720-14-3

Mol F.

: C15H27NO4

Mol W.

: 285.4

Cat No.

: SA44005

ENALAPRIL, Impurities

Enalapril Impurity C | CAS : 76420-72-9

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CAS No.

: 76420-72-9

Mol F.

: C18H24N2O5

Mol W.

: 348.4

Cat No.

: SA44003

Impurities, Sitagliptin

Enamine Diamide Impurity

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CAS No.

Mol F.

: C18H15F6N5O2

Mol W.

: 447.33

Cat No.

: SA10425

Impurities, Sofosbuvir

ent-Sofosbuvir desphosphate

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CAS No.

: 1946820-96-7

Mol F.

: C10H13FN2O5

Mol W.

: 260.22

Cat No.

: SA15428

Entacapone, Impurities

Entacapone

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CAS No.

: 130929-57-6

Mol F.

: C14H15N3O5

Mol W.

: 305.29000000000002

Cat No.

: SA26900

Entacapone, Impurities

Entacapone 3-Methyl Ether

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CAS No.

: 857629-78-8

Mol F.

: C15H17N3O5

Mol W.

: 319.31

Cat No.

: SA26911

Entacapone, Impurities

Entacapone 5-Nitrovanillin Dimer Impurity

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CAS No.

: 2514697-83-5

Mol F.

: C22H29N5O6

Mol W.

: 459.5

Cat No.

: SA26912

Entacapone, Impurities

Entacapone Benzoic Acid Impurity

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CAS No.

: 84211-30-3

Mol F.

: C7H5NO6

Mol W.

: 199.21

Cat No.

: SA26910

Entacapone, Impurities

Entacapone EP Impurity A

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CAS No.

: 145195-63-7

Mol F.

: C14H15N3O5

Mol W.

: 305.29000000000002

Cat No.

: SA26901

Entacapone, Impurities

Entacapone EP Impurity D

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CAS No.

: 857629-79-9

Mol F.

: C16H19N3O5

Mol W.

: 333.34

Cat No.

: SA26904

Entacapone, Impurities

Entacapone EP Impurity E

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CAS No.

: 7659-29-2

Mol F.

: C6H4N2O6

Mol W.

: 200.11

Cat No.

: SA26905

Entacapone, Impurities

Entacapone EP Impurity F

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CAS No.

: 160391-70-8

Mol F.

: C10H6N2O6

Mol W.

: 250.16

Cat No.

: SA26906

Entacapone, Impurities

Entacapone EP Impurity G

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CAS No.

: 1364322-41-7

Mol F.

: C11H9N3O5

Mol W.

: 263.20999999999998

Cat No.

: SA26907

Entacapone, Impurities

Entacapone EP Impurity H

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CAS No.

: 1150310-15-8

Mol F.

: C15H15N3O5

Mol W.

: 317.3

Cat No.

: SA26908

Entacapone, Impurities

Entacapone EP Impurity I

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CAS No.

: 1364322-42-8

Mol F.

: C13H12N2O6

Mol W.

: 292.24

Cat No.

: SA26909

Epinephrine, Impurities, Nitrosamine

Epinephrine Nitroso Impuirty

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CAS No.

Mol F.

: C9H12N2O4

Mol W.

: 212.2

Cat No.

: SA44665

Eplerenone, Impurities

Eplerenone

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CAS No.

: 107724-20-9

Mol F.

: C24H30O6

Mol W.

: 414.49

Cat No.

: SA41800

Eplerenone, Impurities

Eplerenone 11-alpha-Hydroxy Canrenone Impurity

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CAS No.

: 192569-17-8

Mol F.

: C22H28O4

Mol W.

: 356.46

Cat No.

: SA41802

Eplerenone, Impurities

Eplerenone 11-alpha-Hydroxy Nitroethyl Impurity

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CAS No.

Mol F.

: C23H31NO6

Mol W.

: 417.5

Cat No.

: SA41813

Eplerenone, Impurities

Eplerenone 6-beta-Hydroxy Analog

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CAS No.

: 209253-80-5

Mol F.

: C24H30O6

Mol W.

: 430.49

Cat No.

: SA41810

Eplerenone, Impurities

Eplerenone Canrenone Impurity

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CAS No.

: 976-71-6

Mol F.

: C22H28O3

Mol W.

: 340.46

Cat No.

: SA41801

Eplerenone, Impurities

Eplerenone EP Impurity A

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CAS No.

: 209253-67-8

Mol F.

: C23H28O5

Mol W.

: 384.47

Cat No.

: SA41804

Eplerenone, Impurities

Eplerenone EP Impurity B

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CAS No.

: 192704-82-8

Mol F.

: C24H30O6

Mol W.

: 414.49

Cat No.

: SA41805

Eplerenone, Impurities

Eplerenone EP Impurity C

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CAS No.

: 95716-70-4

Mol F.

: C24H30O5

Mol W.

: 398.49

Cat No.

: SA41812

Eplerenone, Impurities

Eplerenone EP Impurity D

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CAS No.

: 209253-82-7

Mol F.

: C23H28O6

Mol W.

: 400.46

Cat No.

: SA41806

Eplerenone, Impurities

Eplerenone EP Impurity E

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CAS No.

: 209253-81-6

Mol F.

: C24H30O6

Mol W.

: 414.49

Cat No.

: SA41811

Eplerenone, Impurities

Eplerenone EP Impurity F

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CAS No.

: 579484-30-3

Mol F.

: C24H32O7

Mol W.

: 432.51

Cat No.

: SA41807

Eplerenone, Impurities

Eplerenone EP Impurity G

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CAS No.

: 41020-65-9

Mol F.

: C24H32O5

Mol W.

: 400.51

Cat No.

: SA41808

Fluorometholone, Impurities

Epoxyfluorometholone acetate

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CAS No.

: 83873-17-0

Mol F.

: C24H30O5

Mol W.

: 398.49

Cat No.

: SA38417

Equilin, Impurities

Equilin

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CAS No.

: 474-86-2

Mol F.

: C18H20O2

Mol W.

: 268.35

Cat No.

: SA16400

Equilin, Impurities

Equilin 3-Benzoate

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CAS No.

: 6030-80-4

Mol F.

: C25H24O3

Mol W.

: 372.45

Cat No.

: SA16401

Equilin, Impurities

Equilin 3-O-Methyl Ether

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CAS No.

: 6030-83-7

Mol F.

: C19H22O2

Mol W.

: 282.38

Cat No.

: SA16407

Erlotinib, Impurities

Erlotinib 7-O-Chloroethyl Analog

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CAS No.

: 183320-19-6

Mol F.

: C21H21Cl2N3O3

Mol W.

: 434.32

Cat No.

: SA25204

Erlotinib, Impurities

Erlotinib Carboxylic Acid

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CAS No.

: 882420-21-5

Mol F.

: C22H25N3O6

Mol W.

: 427.45

Cat No.

: SA25206

Erlotinib, Impurities

Erlotinib Didesmethyl

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CAS No.

: 183321-84-8(base)183320-12-9(HClsalt)

Mol F.

: C20H19N3O4

Mol W.

: 365.38

Cat No.

: SA25208

Erlotinib, Impurities

Erlotinib Impurity E

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CAS No.

: 1058132-82-3

Mol F.

: C22H25N3O4

Mol W.

: 395.45

Cat No.

: SA25215

Erlotinib, Impurities

Erlotinib Impurity F

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CAS No.

: 1809951-10-7

Mol F.

: C28H34N4O9

Mol W.

: 570.59

Cat No.

: SA25223

Erlotinib, Impurities

Erlotinib Impurity K

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CAS No.

: 2204518-92-1

Mol F.

: C22H24ClN3O4

Mol W.

: 429.9

Cat No.

: SA25219

Erlotinib, Impurities

Erlotinib Related compound A

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CAS No.

: 299912-59-7

Mol F.

: C25H30ClN3O5

Mol W.

: 487.98

Cat No.

: SA25214

Ertugliflozin, Impurities

Ertugliflozin

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CAS No.

: 1210344-57-2

Mol F.

: C22H25ClO7

Mol W.

: 436.88

Cat No.

: SA36800

Ertugliflozin, Impurities

Ertugliflozin C-2 Epimer Impurity

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CAS No.

Mol F.

: C22H25ClO7

Mol W.

: 436.88

Cat No.

: SA36805

Ertugliflozin, Impurities

Ertugliflozin Impuity SA36802

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CAS No.

Mol F.

: C28H33ClO13

Mol W.

: 613

Cat No.

: SA36802

Ertugliflozin, Impurities

Ertugliflozin isomer Impurity

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CAS No.

Mol F.

: C22H25ClO7

Mol W.

: 436.88

Cat No.

: SA36801

Erythromycin, Impurities

Erythromycin

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CAS No.

: 114-07-8

Mol F.

: C37H67NO13

Mol W.

: 733.9

Cat No.

: SA53200

Escitalopram, Impurities

Escitalopram acid

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CAS No.

: NA

Mol F.

: C20H21FN2O3

Mol W.

: 356.39

Cat No.

: SA21214