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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
SA42405

,

Tenofovir Alafenamide Enantiomer
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In Stock

CAS No.

: NA

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42405

SA42411

,

Tenofovir Alafenamide Impurity E
Please enquire for price & pack size
In Stock

CAS No.

Mol F.

: C18H24N5O4P

Mol W.

: 405.39

Cat No.

: SA42411

SA42412

,

Tenofovir alafenamide Impurity G
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In Stock

CAS No.

: 160616-04-6

Mol F.

: C15H26N5O4P

Mol W.

: 371.38

Cat No.

: SA42412

SA42406

,

Tenofovir Alafenamide Methyl Ester Impurity
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In Stock

CAS No.

: 390409-27-5

Mol F.

: C19H25N6P5O

Mol W.

: 448.16

Cat No.

: SA42406

SA42414

,

Tenofovir alafenamide propyl ester
Please enquire for price & pack size
In Stock

CAS No.

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42414

SA42408

,

Tenofovir Alafenamide Racemic D Isomer
Please enquire for price & pack size
In Stock

CAS No.

: NA

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42408

SA42409

,

Tenofovir alafenamide undesired isomer
Please enquire for price & pack size
In Stock

CAS No.

: NA

Mol F.

: C21H29N6O5P

Mol W.

: 476.47

Cat No.

: SA42409

SA42410

,

Tenofovir Anhydride Dimer
Please enquire for price & pack size
In Stock

CAS No.

: NA

Mol F.

: C30H56N12O7P2

Mol W.

: 758.79

Cat No.

: SA42410

SA36934

,

Tenofovir Desmethyl Impurity
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In Stock

CAS No.

: 106941-25-7

Mol F.

: C8H12N5O4P

Mol W.

: 273.19

Cat No.

: SA36934

SA36915

,

Tenofovir Diethyl Ester (R)-Isomer
$295.00 25 mg
In Stock

CAS No.

: 180587-75-1

Mol F.

: C13H22N5O4P

Mol W.

: 343.32

Cat No.

: SA36915

SA36916

,

Tenofovir Diethylcarbamoyl Impurity
$395.00 25 mg
In Stock

CAS No.

: 1246812-23-6

Mol F.

: C20H33N6O9P

Mol W.

: 532.48

Cat No.

: SA36916

SA36923

,

Tenofovir Disoproxil 6N-Methoxymethyl Impurity
$395.00 25 mg
In Stock

CAS No.

: 2514954-65-3

Mol F.

: C21H34N5O11P

Mol W.

: 563.5

Cat No.

: SA36923

SA36919

,

Tenofovir Disoproxil Desmethyl Fumarate
$295.00 25 mg
In Stock

CAS No.

: 365417-53-4; 1798422-29-3

Mol F.

: C18H28N5O10P

Mol W.

: 505.42

Cat No.

: SA36919

SA36901

,

Tenofovir Disoproxil Fumarate IP Impurity A; Tenofovir Monosoproxil
$110.00 25 mg
In Stock

CAS No.

: 211364-69-1

Mol F.

: C14H22N5O7P

Mol W.

: 403.33

Cat No.

: SA36901

,

Tenofovir Disoproxil Fumarate IP Impurity B
$295.00 25 mg
In Stock

CAS No.

: 1246812-16-7

Mol F.

: C15H24N5O7P

Mol W.

: 417.35

Cat No.

: SA36902

SA36903

,

Tenofovir Disoproxil Fumarate IP Impurity C
$195.00 25 mg
In Stock

CAS No.

: 1246812-43-0

Mol F.

: C21H30N5O14P

Mol W.

: 491.39

Cat No.

: SA36903

SA36905

,

Tenofovir Disoproxil Fumarate IP Impurity E
$295.00 25 mg
In Stock

CAS No.

: 1244022-56-7

Mol F.

: C18H28N5O9P

Mol W.

: 489.42

Cat No.

: SA36905

SA36907

,

Tenofovir Disoproxil Fumarate IP Impurity G; Tenofovir (S)-Isomer
$150.00 25 mg
In Stock

CAS No.

: 1432630-26-6;1280130-08-6(FreeBase)

Mol F.

: C23H34N5O14P

Mol W.

: 635.5

Cat No.

: SA36907

SA36908

,

Tenofovir Disoproxil Fumarate IP Impurity H
$250.00 25 mg
In Stock

CAS No.

: 1217542-13-6

Mol F.

: C19H30N5O10P

Mol W.

: 519.44

Cat No.

: SA36908

SA36910

,

Tenofovir Disoproxil Fumarate IP Impurity J
$325.00 25 mg
In Stock

CAS No.

: 1093279-76-5

Mol F.

: C39H60N10O20P2

Mol W.

: 1050.9

Cat No.

: SA36910

SA36911

,

Tenofovir Disoproxil Fumarate IP Impurity K
$195.00 25 mg
In Stock

CAS No.

: 4121-40-8;1446486-33-4

Mol F.

: C8H9N5

Mol W.

: 175.19

Cat No.

: SA36911

SA36913

,

Tenofovir Disoproxil Fumarate IP Impurity M (Fumarate)
$155.00 25 mg
In Stock

CAS No.

: 1422284-16-9

Mol F.

: C18H28N5O10P

Mol W.

: 505.42

Cat No.

: SA36913

SA36935

,

Tenofovir Ethanol Impurity
Please enquire for price & pack size
In Stock

CAS No.

: 707-99-3

Mol F.

: C7H9N5O

Mol W.

: 179.18

Cat No.

: SA36935

SA36914

,

Tenofovir Isoproxil Isopropoxycarbonyl Impurity
$395.00 25 mg
In Stock

CAS No.

: 1244022-54-5

Mol F.

: C23H36N5O12P

Mol W.

: 605.53

Cat No.

: SA36914

SA36921

,

Tenofovir Monoisoproxil Ethoxy Impurity
$295.00 25 mg
In Stock

CAS No.

: 1796539-92-8

Mol F.

: C16H26N5O7P

Mol W.

: 431.38

Cat No.

: SA36921

Terbinafine-EP-Impurity-A

,

Terbinafine EP Impurity A
Please enquire for price & pack size
In Stock

CAS No.

: 14489-75-9(base);65473-13-4(salt)

Mol F.

: C12H13N

Mol W.

: 171.24

Cat No.

: SA25700

Terbinafine-EP-Impurity-B

,

Terbinafine EP Impurity B
Please enquire for price & pack size
In Stock

CAS No.

: 176168-78-8

Mol F.

: C21H26ClN

Mol W.

: 327.89

Cat No.

: SA25701

Terbinafine-EP-Impurity-E

,

Terbinafine EP Impurity E
Please enquire for price & pack size
In Stock

CAS No.

: 934365-23-8(base)

Mol F.

: C36H40N2

Mol W.

: 500.71

Cat No.

: SA25704

SA33042

,

Tert-butyl (1R,2R,5S)-2-(2-(5- chloropyridin-2-ylamino)-2- oxoacetamido)-5- (dimethylcarbamoyl)cyclohexy lcarbamate
Please enquire for price & pack size
In Stock

CAS No.

: 480451-98-7

Mol F.

: C21H30ClN5O5

Mol W.

: 467.95

Cat No.

: SA33042

SA33045

,

Tert-butyl (1S,2R,5R)-2-(2-(5- chloropyridin-2-ylamino)-2- oxoacetamido)-5- (dimethylcarbamoyl)cyclohexy lcarbamate
Please enquire for price & pack size
In Stock

CAS No.

: 1255529-33-9

Mol F.

: C21H30ClN5O5

Mol W.

: 467.95

Cat No.

: SA33045

SA33043

,

Tert-butyl (1S,2S,5R)-2-(2-(5- chloropyridin-2-ylamino)-2- oxoacetamido)-5- (dimethylcarbamoyl)cyclohexy lcarbamate
Please enquire for price & pack size
In Stock

CAS No.

: 2024614-21-7

Mol F.

: C21H30ClN5O5

Mol W.

: 467.95

Cat No.

: SA33043

tert-Butyl-3R5R-6-Chloro-5-hydroxy-3-oxohexanoate

,

tert-Butyl (3R,5R)-6-Chloro-5-hydroxy-3-oxohexanoate
$250.00 25 mg
In Stock

CAS No.

: 404958-69-6

Mol F.

: C10H19ClO4

Mol W.

: 238.71

Cat No.

: SA12155

tert-Butyl-3S5R-6-Chloro-35-dihydroxyhexanoate

,

tert-Butyl (3S,4R)-6-Chloro-3,5-dihydroxyhexanoate
$200.00 25 mg
In Stock

CAS No.

: 404958-68-5

Mol F.

: C10H19ClO4

Mol W.

: 238.71

Cat No.

: SA12151

tert-Butyl-3S5S-6-Chloro-35-dihydroxyhexanoate

,

tert-Butyl (3S,5S)-6-Chloro-3,5-dihydroxyhexanoate
$250.00 25 mg
In Stock

CAS No.

: 325471-28-1

Mol F.

: C10H19ClO4

Mol W.

: 238.71

Cat No.

: SA12156

tert-Butyl-4R6S-6-Hydroxymethyl-22-dimethyl-13-dioxane-4-acetate

,

tert-Butyl (4R,6S)-6-(Hydroxymethyl)-2,2-dimethyl-1,3-dioxane-4-acetate
$80.00 25 mg
In Stock

CAS No.

: 124655-09-0

Mol F.

: C13H24O5

Mol W.

: 260.33

Cat No.

: SA12195

,

tert-Butyl (5-(hydroxymethyl)-2,2-dimethyl-1,3-dioxan-5-yl)carbamate
Please enquire for price & pack size
In Stock

CAS No.

: 364631-72-1

Mol F.

: C12H23NO5

Mol W.

: 261.31

Cat No.

: SA46807

tert-Butyl-4R6R-6-hydroxymethyl-22-dimethyl-13-dioxan-4-ylacetate

,

tert-Butyl [(4R,6R)-6-(hydroxymethyl)-2,2-dimethyl-1,3-dioxan-4-yl]acetate
$350.00 25 mg
In Stock

CAS No.

: 407577-54-2

Mol F.

: C13H24O5

Mol W.

: 260.33

Cat No.

: SA12196

tert-Butyl-4R6S-6-chloromethyl-22-dimethyl-13-dioxan-4-ylacetate

,

tert-Butyl [(4R,6S)-6-(chloromethyl)-2,2-dimethyl-1,3-dioxan-4-yl]acetate
$100.00 25 mg
In Stock

CAS No.

: 154026-94-5

Mol F.

: C13H23ClO4

Mol W.

: 278.77

Cat No.

: SA12193

tert-Butyl-4S6R-6-hydroxymethyl-22-dimethyl-13-dioxan-4-ylacetate

,

tert-Butyl [(4S,6R)-6-(hydroxymethyl)-2,2-dimethyl-1,3-dioxan-4-yl]acetate
$250.00 25 mg
In Stock

CAS No.

: 148809-28-3

Mol F.

: C13H24O5

Mol W.

: 260.33

Cat No.

: SA12194

tert-Butyl-4S6S-6-hydroxymethyl-22-dimethyl-13-dioxan-4-ylacetate

,

tert-Butyl [(4S,6S)-6-(hydroxymethyl)-2,2-dimethyl-1,3-dioxan-4-yl]acetate
$250.00 25 mg
In Stock

CAS No.

: 2124272-05-3

Mol F.

: C13H24O5

Mol W.

: 260.33

Cat No.

: SA12197

SA32521

,

Tert-butyl 2-((3aR,4S,6R,6aS)-6- amino-2,2-dimethyltetrahydro- 3aH-cyclopenta[d][1,3]dioxol- 4-yloxy)acetate
Please enquire for price & pack size
In Stock

CAS No.

Mol F.

: C14H25NO5

Mol W.

: 287.35

Cat No.

: SA32521

tert-Butyl-2-4R6R-6-chloromethyl-22-dimethyl-1.3-dioxan-4-ylacetate

,

tert-Butyl 2-((4R,6R)-6-(chloromethyl)-2,2-dimethyl-1.3-dioxan-4-yl)acetate
$200.00 25 mg
In Stock

CAS No.

: 521974-01-6

Mol F.

: C13H23ClO4

Mol W.

: 278.77

Cat No.

: SA12157

Tert-butyl-2-4R6S-6-acetoxymethyl-22-dimethyl-13-dioxan-4-ylacetate

,

Tert-butyl 2-((4R,6S)-6-(acetoxymethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetate
$80.00 25 mg
In Stock

CAS No.

: 154026-95-6

Mol F.

: C15H26O6

Mol W.

: 302.4

Cat No.

: SA121111

Tert-butyl-2-4S6R-6-E-2-2-cyclopropyl-4-4-fluorophenylquinolin-3-ylvinyl-22-dimethyl-13-dioxan-4-ylacetate

,

Tert-butyl 2-((4S,6R)-6-((E)-2-(2-cyclopropyl-4-(4-fluorophenyl)quinolin-3-yl)vinyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetate
Please enquire for price & pack size
In Stock

CAS No.

Mol F.

: C32H36FNO4

Mol W.

: 517.63

Cat No.

: SA29526

Atorvastatin

,

Tert-butyl 2-((4S,6R)-6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetate
$240.00 50 mg
In Stock

CAS No.

: 1105067-89-7

Mol F.

: C₁₄H₂₇NO₄

Mol W.

: 273.37

Cat No.

: SA17842

,

tert-Butyl 2-((4S,6R)-6-(chloromethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetate
$150.00 25 mg
In Stock

CAS No.

: 521973-99-9

Mol F.

: C13H23ClO4

Mol W.

: 278.77

Cat No.

: SA12153

,

tert-Butyl 2-((4S,6S)-6-(chloromethyl(02,2-1,3-dioxan-4-yl)acetate
$200.00 25 mg
In Stock

CAS No.

: 521974-00-5

Mol F.

: C13H23ClO4

Mol W.

: 278.77

Cat No.

: SA12158

SA40418

,

Tert-butyl 4-(6-((6-(1-butoxyvinyl)-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino)pyridin-3-yl)piperazine-1-carboxylate
$110.00 25 mg
In Stock

CAS No.

: 866084-31-3

Mol F.

: C33H45N7O4

Mol W.

: 603.75

Cat No.

: SA40418

SA40444

,

Tert-butyl 4-(6-bromo-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)piperazine-1-carboxylate
Please enquire for price & pack size
In Stock

CAS No.

Mol F.

: C22H30BrN5O3

Mol W.

: 492.41

Cat No.

: SA40444

SA41328

,

tert-Butyl 4-(benzo[b]thiophen-4-yl)piperazine
Please enquire for price & pack size
In Stock

CAS No.

: 1191901-07-1

Mol F.

: C17H22N2O2S

Mol W.

: 318.44

Cat No.

: SA41328

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