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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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Impurities, Norethindrone

6α-Hydroxy Norethindrone

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In Stock

CAS No.

: 438244-33-8

Mol F.

: C20H26O3

Mol W.

: 314.42

Cat No.

: SA13411

Impurities, Norethindrone

6α-Hydroxy Norethindrone Acetate

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In Stock

CAS No.

: 6856-28-6

Mol F.

: C22H28O4

Mol W.

: 356.46

Cat No.

: SA13402

Exemestane, Impurities

6α-Methoxymethyl Exemestane Impurity

Please enquire for price & pack size

In Stock

CAS No.

: 881896-95-3

Mol F.

: C21H28O3

Mol W.

: 328.45

Cat No.

: SA19111

Impurities, Prednisone

6α-Methyl Prednisone 21-Acetate

Please enquire for price & pack size

In Stock

CAS No.

: 115321-98-7

Mol F.

: C24H30O6

Mol W.

: 414.49

Cat No.

: SA26214

Impurities, Methylprednisolone

6α-Methylprednisolone

Please enquire for price & pack size

In Stock

CAS No.

: 83-43-2

Mol F.

: C22H30O5

Mol W.

: 374.47

Cat No.

: SA14401

Impurities, Naltrexol

6α-Naltrexol

Please enquire for price & pack size

In Stock

CAS No.

: 20410-98-4

Mol F.

: C20H25NO4

Mol W.

: 343.42

Cat No.

: SA46700

Difluoroprednisolone, Impurities

6α,9α-Difluoro-11β,21-dihydroxy-pregna-1,4,16-triene-3,20-dione

$355.00 25 mg

In Stock

CAS No.

: 1270039-29-6

Mol F.

: C₂₁H₂₄F₂O₄

Mol W.

: 378.41

Cat No.

: SA14213

Difluoroprednisolone, Impurities

6α,9α-Difluoroprednisolone 17-Acetate

$295.00 25 mg

In Stock

CAS No.

: 23674-85-3

Mol F.

: C23H28F2O6

Mol W.

: 438.46

Cat No.

: SA14201

Difluoroprednisolone, Impurities

6α,9α-Difluoroprednisolone 17-Butyrate

$195.00 10 mg

In Stock

CAS No.

: 23640-96-2

Mol F.

: C25H32F2O6

Mol W.

: 466.51

Cat No.

: SA14204

Difluoroprednisolone, Impurities

6α,9α-Difluoroprednisolone 21-Acetate

$195.00 25 mg

In Stock

CAS No.

: 52-70-0

Mol F.

: C23H28F2O6

Mol W.

: 438.46

Cat No.

: SA14202

Difluoroprednisolone, Impurities

6α,9α-Difluoroprednisolone 21-Butyrate

$275.00 25 mg

In Stock

CAS No.

Mol F.

: C25H32F2O6

Mol W.

: 466.51

Cat No.

: SA14203

Estradiol, Impurities

6β-Hydroxy 17β-Estradiol

Please enquire for price & pack size

In Stock

CAS No.

: 3583-03-7

Mol F.

: C18H24O3

Mol W.

: 288.38

Cat No.

: SA13202

Dexamethasone, Impurities

6β-Hydroxy Dexamethasone

Please enquire for price & pack size

In Stock

CAS No.

: 55879-47-5

Mol F.

: C₂₂H₂₉FO₆

Mol W.

: 408.46

Cat No.

: SA15503

Hydrocortisone, Impurities

6β-hydroxy hydrcortisone acetate impurity

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C22H32O5

Mol W.

: 376.49

Cat No.

: SA15227

Impurities, Mometasone

6β-Hydroxy Mometasone Furoate

$255.00 25 mg

In Stock

CAS No.

: 132160-74-8

Mol F.

: C27H30Cl2O7

Mol W.

: 537.43

Cat No.

: SA28713

Impurities, Naloxone

6β-Hydroxy Naloxone

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C19H23NO4

Mol W.

: 329.39

Cat No.

: SA45107

Impurities, Norethindrone

6β-Hydroxy Norethindrone Acetate

Please enquire for price & pack size

In Stock

CAS No.

: 6856-27-5

Mol F.

: C22H28O4

Mol W.

: 356.46

Cat No.

: SA13404

Impurities, Testosterone

6β-Hydroxytestosterone

Please enquire for price & pack size

In Stock

CAS No.

: 62-99-7

Mol F.

: C19H28O3

Mol W.

: 304.43

Cat No.

: SA16214

Bromfenac, Impurities

7-(4-Bromobenzoyl)-1H-indole-2,3-dione

Please enquire for price & pack size

In Stock

CAS No.

: 241825-88-7

Mol F.

: C15H8BrNO3

Mol W.

: 330.13

Cat No.

: SA18909

Bromfenac, Impurities

7-(4-Bromobenzoyl)indole

Please enquire for price & pack size

In Stock

CAS No.

: 91714-50-0

Mol F.

: C15H10BrNO

Mol W.

: 300.16

Cat No.

: SA18916

Brexpiprazole, Impurities

7-(4-bromobutoxy)-1H-quinolin-2-one

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C13H14BrNO2

Mol W.

: 296.16000000000003

Cat No.

: SA41319

Aripiprazole, Impurities

7-(4-Bromobutoxy)-quinoline-2(1H)-one

Please enquire for price & pack size

In Stock

CAS No.

: 203395-59-9

Mol F.

: C13H14BrNO2

Mol W.

: 296.16

Cat No.

: SA24030

Impurities, Linagliptin

7-(but-2-ynyl)-8-(2-hydroxyethylamino)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-1H-purine-2,6(3H,7H)-dione

Please enquire for price & pack size

In Stock

CAS No.

: 2074688-84-7

Mol F.

: C22H23N7O3

Mol W.

: 433.46

Cat No.

: SA49911

Clindamycin, Impurities

7-Epi Clindamycin

Please enquire for price & pack size

In Stock

CAS No.

: 16684-06-3

Mol F.

: C₁₈H₃₃ClN₂O₅S

Mol W.

: 424.98

Cat No.

: SA29707

Impurities, Irganox

7,9-Di-tert-butyl-1-oxaspiro[4.5]deca-6,9-diene-2,8-dione

Please enquire for price & pack size

In Stock

CAS No.

: 82304-66-3

Mol F.

: C17H24O3

Mol W.

: 276.37

Cat No.

: SA11105

Fulvestrant, Impurities

7β-Fulvestrant

$500.00 25 mg

In Stock

CAS No.

: 407577-53-1

Mol F.

: C32H475O3S

Mol W.

: 606.77

Cat No.

: SA11802

Gatifloxacin, Impurities

8-Hydroxy Gatifloxacin

Please enquire for price & pack size

In Stock

CAS No.

: 616205-76-6

Mol F.

: C18H20FN3O4

Mol W.

: 361.37

Cat No.

: SA37901

Famciclovir, Impurities

9-(2-bromoethyl)9H-purin-2- amine

Please enquire for price & pack size

In Stock

CAS No.

: 214201-64-6

Mol F.

: C7H9BrClN5

Mol W.

: 278.54

Cat No.

: SA48301

Impurities, Oxcarbazepine

9-Acridone

$95.00 25 mg

In Stock

CAS No.

: 578-95-0

Mol F.

: C13H9N

Mol W.

: 195.22

Cat No.

: SA12503

Clobetasol Propionate, Impurities

9-Alpha-Fluro-21-Chlorine Prednisolone-17-Propioinate

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C24H30ClFO5

Mol W.

: 452.94

Cat No.

: SA17114

Fluorometholone, Impurities

9-Chloro Fluorometholone

Please enquire for price & pack size

In Stock

CAS No.

: NA

Mol F.

: C22H29ClO4

Mol W.

: 392.91

Cat No.

: SA38411

Beclomethasone Dipropionate, Impurities

9-Deschloro-9-bromo Beclomethasone Dipropionate

$595.00 25 mg

In Stock

CAS No.

: 52092-14-5

Mol F.

: C28H37BrO7

Mol W.

: 565.49

Cat No.

: SA15605

Impurities, Triamcinolone Acetonide

9,11-Dehydro Triamcinolone Acetonide

$295.00 25 mg

In Stock

CAS No.

: 5541-37-7

Mol F.

: C₂₄H₃₀O₅

Mol W.

: 398.49

Cat No.

: SA30211

Betamethasone, Impurities

9,11-epoxy-1,2-Dihydro Beatamethasone

$145.00 25 mg

In Stock

CAS No.

: 114488-14-1

Mol F.

: C22H30O5

Mol W.

: 374.47

Cat No.

: SA26611

Betamethasone, Impurities

9,11,Betamethasone Sodium Phosphate

Please enquire for price & pack size

In Stock

CAS No.

Mol F.

: C22H27Na2O7P

Mol W.

: 480.4

Cat No.

: SA26616

Beclomethasone Dipropionate, Impurities

9,11β-Dichloro-17,21-dihydroxy-16β-methyl-pregna-1,4-diene-3,20-dione Dipropionate

$595.00 25 mg

In Stock

CAS No.

: 14527-61-8

Mol F.

: C28H38Cl2O6

Mol W.

: 539.49

Cat No.

: SA15616

Impurities, Triamcinolone Acetonide

9,11β-Epoxy Triamcinolone Acetonide

$295.00 25 mg

In Stock

CAS No.

: 39672-75-8

Mol F.

: C₂₄H₃₀O₆

Mol W.

: 414.49

Cat No.

: SA30210

Impurities, Testosterone

9(11)-Dehydrotestosterone

Please enquire for price & pack size

In Stock

CAS No.

: 2398-99-4

Mol F.

: C19H26O2

Mol W.

: 286.41

Cat No.

: SA16225

Hydrocortisone, Impurities

9(11)-Epoxide Hydrocortisone

Please enquire for price & pack size

In Stock

CAS No.

: 10072-97-6

Mol F.

: C21H28O5

Mol W.

: 360.44

Cat No.

: SA15225

Impurities, Methylprednisolone

9α-Fluoro-6α-methylprednisolone

$125.00 25 mg

In Stock

CAS No.

: 382-52-5

Mol F.

: C22H29FO5

Mol W.

: 392.46

Cat No.

: SA14418

Desoximetasone, Impurities

9β,11β Epoxy Desoximetasone

Please enquire for price & pack size

In Stock

CAS No.

: 151265-33-7

Mol F.

: C22H28O4

Mol W.

: 356.46

Cat No.

: SA19201

Abacavir, Impurities

Abacavir Chloro Derivative

$295.00 25 mg

In Stock

CAS No.

Mol F.

: C14H17ClN6

Mol W.

: 304.78

Cat No.

: SA18123

Abacavir, Impurities

Abacavir Cyclopropyl Diamino Purine Impurity

$80.00 25 mg

In Stock

CAS No.

: 120503-69-7

Mol F.

: C8H10N6

Mol W.

: 190.21

Cat No.

: SA18107

Abacavir, Impurities

Abacavir EP Impurity B

$175.00 25 mg

In Stock

CAS No.

: 1443421-69-9

Mol F.

: C18H21ClN10O

Mol W.

: 428.88

Cat No.

: SA18110

Abacavir, Impurities

Abacavir EP Impurity C

$195.00 25 mg

In Stock

CAS No.

: 124752-25-6

Mol F.

: C11H14N6O

Mol W.

: 246.27

Cat No.

: SA18112

Abacavir, Impurities

Abacavir EP Impurity E

$255.00 25 mg

In Stock

CAS No.

: 208762-35-0

Mol F.

: C14H20N6O

Mol W.

: 288.35

Cat No.

: SA18117

Abacavir, Impurities

Abacavir Ethanolate Impurity

$175.00 25 mg

In Stock

CAS No.

: 2211067-09-1

Mol F.

: C13H17N5O2

Mol W.

: 275.31

Cat No.

: SA18101

Abacavir, Impurities

Abacavir Impurity 3

$295.00 25 mg

In Stock

CAS No.

Mol F.

: C12H12ClN502

Mol W.

: 293.71

Cat No.

: SA18102

Abacavir, Impurities

Abacavir methanolate Impurity

$175.00 25 mg

In Stock

CAS No.

Mol F.

: C12H15N5O2

Mol W.

: 261.28

Cat No.

: SA18105

Abacavir, Impurities

Abacavir N-Formyl Derivative

Please enquire for price & pack size

In Stock

CAS No.

: 229177-44-0

Mol F.

: C11H14ClN5O2

Mol W.

: 283.71

Cat No.

: SA18124