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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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Tert-butyl (1R,2R,5S)-2-(2-(5- chloropyridin-2-ylamino)-2- oxoacetamido)-5- (dimethylcarbamoyl)cyclohexy lcarbamate | 480451-98-7 | Edoxaban

,

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

Tert-butyl (1S,2R,5R)-2-(2-(5- chloropyridin-2-ylamino)-2- oxoacetamido)-5- (dimethylcarbamoyl)cyclohexy lcarbamate | 1255529-33-9 | Edoxaban

,

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

Tert-butyl (1S,2S,5R)-2-(2-(5- chloropyridin-2-ylamino)-2- oxoacetamido)-5- (dimethylcarbamoyl)cyclohexy lcarbamate | 2024614-21-7 | Edoxaban

,

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 (3R,5R)-6-Chloro-5-hydroxy-3-oxohexanoate | 404958-69-6 | Rosuvastatin

,

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 (3S,4R)-6-Chloro-3,5-dihydroxyhexanoate | 404958-68-5 | Rosuvastatin

,

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 (3S,5S)-6-Chloro-3,5-dihydroxyhexanoate | 325471-28-1 | Rosuvastatin

,

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 (4R,6S)-6-(Hydroxymethyl)-2,2-dimethyl-1,3-dioxane-4-acetate | 124655-09-0 | Rosuvastatin

,

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 | 364631-72-1 | Fosfomycin

,

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 [(4R,6R)-6-(hydroxymethyl)-2,2-dimethyl-1,3-dioxan-4-yl]acetate | 407577-54-2 | Rosuvastatin

,

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 [(4R,6S)-6-(chloromethyl)-2,2-dimethyl-1,3-dioxan-4-yl]acetate | 154026-94-5 | Rosuvastatin

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 [(4S,6R)-6-(hydroxymethyl)-2,2-dimethyl-1,3-dioxan-4-yl]acetate | 148809-28-3 | Rosuvastatin

,

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 [(4S,6S)-6-(hydroxymethyl)-2,2-dimethyl-1,3-dioxan-4-yl]acetate | 2124272-05-3 | Rosuvastatin

,

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

Tert-butyl 2-((3aR,4S,6R,6aS)-6- amino-2,2-dimethyltetrahydro- 3aH-cyclopenta[d][1,3]dioxol- 4-yloxy)acetate | Ticagrelor

,

Tert-butyl 2-((3aR,4S,6R,6aS)-6- amino-2,2-dimethyltetrahydro- 3aH-cyclopenta[d][1,3]dioxol- 4-yloxy)acetate
$555.00 100 mg
In Stock

CAS No.

Mol F.

: C14H25NO5

Mol W.

: 287.35

Cat No.

: SA32521

tert-Butyl 2-((4R,6R)-6-(chloromethyl)-2,2-dimethyl-1.3-dioxan-4-yl)acetate | 521974-01-6 | Rosuvastatin

,

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-((4R,6S)-6-(acetoxymethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetate | 154026-95-6 | Rosuvastatin

,

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-((4S,6R)-6-((E)-2-(2-cyclopropyl-4-(4-fluorophenyl)quinolin-3-yl)vinyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetate | Pitavastatin

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
$255.00 10 mg
In Stock

CAS No.

Mol F.

: C32H36FNO4

Mol W.

: 517.63

Cat No.

: SA29526

Tert-butyl 2-((4S,6R)-6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetate | 1105067-89-7 | 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 | 521973-99-9 | Rosuvastatin

,

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 | 521974-00-5 | Rosuvastatin

,

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

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 | 866084-31-3 | Palbociclib

,

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

Tert-butyl 4-(6-bromo-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)piperazine-1-carboxylate | Palbociclib

,

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

tert-Butyl 4-(benzo[b]thiophen-4-yl)piperazine | 1191901-07-1 | Brexpiprazole

,

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

tert-butyl 4-(benzo[b]thiophen-5-yl)pipe | NA | Brexpiprazole

,

tert-butyl 4-(benzo[b]thiophen-5-yl)pipe
Please enquire for price & pack size
In Stock

CAS No.

: NA

Mol F.

: C17H22N2O2S

Mol W.

: 318.44

Cat No.

: SA41327

tert-Butyl 4-(benzo[b]thiophen-7-yl)piperazine | Brexpiprazole

,

tert-Butyl 4-(benzo[b]thiophen-7-yl)piperazine
Please enquire for price & pack size
In Stock

CAS No.

Mol F.

: C17H22N2O2S

Mol W.

: 318.44

Cat No.

: SA41326

tert-Butyl 8-Oxo-3-(trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazine-7(8H)-carboxylate | 877402-44-3 | Sitagliptin

,

tert-Butyl 8-Oxo-3-(trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazine-7(8H)-carboxylate
$395.00 25 mg
In Stock

CAS No.

: 877402-44-3

Mol F.

: C11H13F3N4O3

Mol W.

: 306.24

Cat No.

: SA10433

Tert-butyl(4-(2-chlorobenzyl)phenoxy)dimethylsilane | Dapagliflozin

,

Tert-butyl(4-(2-chlorobenzyl)phenoxy)dimethylsilane
$218.00 25 mg
In Stock

CAS No.

Mol F.

: C19H25ClOSi

Mol W.

: 332.94

Cat No.

: SA15034

Testosterone 17-phenylpropionate | 1255-49-8 | Testosterone

,

Testosterone 17-phenylpropionate
Please enquire for price & pack size
In Stock

CAS No.

: 1255-49-8

Mol F.

: C28H36O3

Mol W.

: 420.59

Cat No.

: SA16227

Testosterone API | 58-22-0 | Testosterone

,

Testosterone API
Please enquire for price & pack size
In Stock

CAS No.

: 58-22-0

Mol F.

: C19H28O2

Mol W.

: 288.424

Cat No.

: SA16228

Testosterone EP Impurity A | 63-05-8 | Testosterone

,

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

CAS No.

: 63-05-8

Mol F.

: C19H26O2

Mol W.

: 286.41

Cat No.

: SA16203

Testosterone EP Impurity C | 481-30-1 | Testosterone

,

Testosterone EP Impurity C
Please enquire for price & pack size
In Stock

CAS No.

: 481-30-1

Mol F.

: C19H28O2

Mol W.

: 288.4

Cat No.

: SA16205

Testosterone EP Impurity D | 1156-92-9 | Testosterone

,

Testosterone EP Impurity D
Please enquire for price & pack size
In Stock

CAS No.

: 1156-92-9

Mol F.

: C19H30O2

Mol W.

: 290.4

Cat No.

: SA16206

Testosterone EP Impurity E | 1045-69-8 | Testosterone

,

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

CAS No.

: 1045-69-8

Mol F.

: C21H30O3

Mol W.

: 330.46

Cat No.

: SA16207

Testosterone EP Impurity E | Testosterone

,

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

CAS No.

Mol F.

: C30H48O3

Mol W.

: 456.7

Cat No.

: SA16202

Testosterone EP Impurity F | 521-18-6 | Testosterone

,

Testosterone EP Impurity F
Please enquire for price & pack size
In Stock

CAS No.

: 521-18-6

Mol F.

: C19H30O2

Mol W.

: 290.4

Cat No.

: SA16208

Testosterone EP Impurity G | 897-06-3 | Testosterone

,

Testosterone EP Impurity G
Please enquire for price & pack size
In Stock

CAS No.

: 897-06-3

Mol F.

: C19H24O2

Mol W.

: 284.4

Cat No.

: SA16209

Testosterone EP Impurity H | 846-48-0 | Testosterone

,

Testosterone EP Impurity H
Please enquire for price & pack size
In Stock

CAS No.

: 846-48-0

Mol F.

: C19H26O2

Mol W.

: 286.4

Cat No.

: SA16210

Testosterone EP Impurity I | 2484-30-2 | Testosterone

,

Testosterone EP Impurity I
Please enquire for price & pack size
In Stock

CAS No.

: 2484-30-2

Mol F.

: C19H26O2

Mol W.

: 286.4

Cat No.

: SA16211

Tetracaine N-Oxide Impurity | CAS : 55750-02-2 | 55750-02-2 | Tetracaine

,

Tetracaine N-Oxide Impurity | CAS : 55750-02-2
$555.00 100 mg
In Stock

CAS No.

: 55750-02-2

Mol F.

: C15H24N2O3

Mol W.

: 280.36

Cat No.

: SA52604

Tetrahydrothiazolopyridine-2-carboxylic acid | CAS : 1190987-12-2 | 1190987-12-2 | Edoxaban

Tetrahydrothiazolopyridine-2-carboxylic acid | CAS : 1190987-12-2
Please enquire for price & pack size
In Stock

CAS No.

: 1190987-12-2

Mol F.

: C7H8N2O2S

Mol W.

: 184.2

Cat No.

: SA33055

Tibolone EP impurity A | 105186-35-4 | Tibolone

,

Tibolone EP impurity A
$400.00 25 mg
In Stock

CAS No.

: 105186-35-4

Mol F.

: C21H28O3

Mol W.

: 328.45

Cat No.

: SA21900

Tibolone EP impurity B | 105186-34-3 | Tibolone

,

Tibolone EP impurity B
$400.00 25 mg
In Stock

CAS No.

: 105186-34-3

Mol F.

: C21H28O4

Mol W.

: 344.45

Cat No.

: SA21901

Tibolone EP impurity C | 1162-60-3 | Tibolone

,

Tibolone EP impurity C
$400.00 25 mg
In Stock

CAS No.

: 1162-60-3

Mol F.

: C21H28O2

Mol W.

: 312.45

Cat No.

: SA21902

Tibolone EP impurity E | 105186-33-2 | Tibolone

,

Tibolone EP impurity E
$100.00 25 mg
In Stock

CAS No.

: 105186-33-2

Mol F.

: C23H34O3

Mol W.

: 358.52

Cat No.

: SA21904

Ticagrelor | 274693-27-5 | Ticagrelor

,

Ticagrelor
$175.00 100 mg
In Stock

CAS No.

: 274693-27-5

Mol F.

: C23H28F2N6O4S

Mol W.

: 522.57

Cat No.

: SA32500

Ticagrelor Impurity E (Mandelate salt) | 376608-71-8 | Ticagrelor

,

Ticagrelor Impurity E (Mandelate salt)
$155.00 100 mg
In Stock

CAS No.

: 376608-71-8

Mol F.

: C17H17F2NO3

Mol W.

: 321.32

Cat No.

: SA32527

Ticagrelor Sulfone Impurity; Ticagrelor Impurity M | 274693-39-9 | Ticagrelor

,

Ticagrelor Sulfone Impurity; Ticagrelor Impurity M
$99.00 10 mg
In Stock

CAS No.

: 274693-39-9

Mol F.

: C23H28F2N6O6S

Mol W.

: 554.57

Cat No.

: SA32525

Ticagrelor Sulfoxide | 1644461-85-7 | Ticagrelor

,

Ticagrelor Sulfoxide
$99.00 10 mg
In Stock

CAS No.

: 1644461-85-7

Mol F.

: C23H28F2N6O5S

Mol W.

: 538.57

Cat No.

: SA32506

Timolol EP Impurity A | 26839-76-9 (Free Base); 26839-77-0 (Maleate Salt) | Timolol

,

Timolol EP Impurity A
$250.00 25 mg
In Stock

CAS No.

: 26839-76-9 (Free Base); 26839-77-0 (Maleate Salt)

Mol F.

: C13H24N4O3S

Mol W.

: 316.42

Cat No.

: SA23200

Timolol EP Impurity B | 59697-06-2 | Timolol

,

Timolol EP Impurity B
$380.00 25 mg
In Stock

CAS No.

: 59697-06-2

Mol F.

: C13H24N4O3S

Mol W.

: 316.42

Cat No.

: SA23201

Timolol EP Impurity C | 610271-56-2; 610271-57-3 | Timolol

,

Timolol EP Impurity C
$490.00 25 mg
In Stock

CAS No.

: 610271-56-2; 610271-57-3

Mol F.

: C19H31N7O4S2

Mol W.

: 485.62

Cat No.

: SA23202

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