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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, Loratadine

Loratadine 8-Dechloro-7-Chloro Impurity

$995.00 25 mg

Out of Stock

CAS No.

: 1346602-19-4

Mol F.

: C22H23ClN2O2

Mol W.

: 382.88

Cat No.

: SA34020

Impurities, Loratadine

Loratadine Desethoxycarbonyl 3-Hydroxy Impurity

$555.00 25 mg

Out of Stock

CAS No.

: 119410-08-1

Mol F.

: C19H19ClN2O

Mol W.

: 326.82

Cat No.

: SA34023

Impurities, Loratadine

Loratadine EP Impurity E

$295.00 25 mg

Out of Stock

CAS No.

: 170727-59-0

Mol F.

: C22H23ClN2O2

Mol W.

: 382.88

Cat No.

: SA34005

Impurities, Loratadine

Loratadine Methanone Impurity

$395.00 25 mg

Out of Stock

CAS No.

: 119770-60-4; 130642-50-1

Mol F.

: C20H24Cl2N2O

Mol W.

: 379.32

Cat No.

: SA34024

Impurities, Loratadine

Loratadine N-Acetyl Impurity

$125.00 25 mg

Out of Stock

CAS No.

: 117796-52-8

Mol F.

: C21H21ClN2O

Mol W.

: 352.86

Cat No.

: SA34025

Impurities, Losartan

Losartan

Please enquire for price & pack size

Out of Stock

CAS No.

: 114798-26-4(base);124750-99-8(PotassiumSalt)

Mol F.

: C22H23ClN6O

Mol W.

: 422.91

Cat No.

: SA26700

Impurities, Losartan

Losartan Aldehyde N2-Trityl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 133910-00-6

Mol F.

: C41H35ClN6O

Mol W.

: 663.21

Cat No.

: SA26715

Impurities, Losartan

Losartan Carboxylic Acid

$255.00 25 mg

Out of Stock

CAS No.

: 124750-92-1

Mol F.

: C22H21ClN6O2

Mol W.

: 436.89

Cat No.

: SA26714

Impurities, Losartan

Losartan EP Impurity D

$95.00 25 mg

Out of Stock

CAS No.

: 83857-96-9

Mol F.

: C8H11ClN2O

Mol W.

: 186.64

Cat No.

: SA26704

Impurities, Losartan

Losartan EP Impurity E

$95.00 25 mg

Out of Stock

CAS No.

: 120568-11-8

Mol F.

: C14H12N4

Mol W.

: 236.27

Cat No.

: SA26705

Impurities, Losartan

Losartan EP Impurity G

$75.00 25 mg

Out of Stock

CAS No.

: 76-84-6

Mol F.

: C19H16O

Mol W.

: 260.33

Cat No.

: SA26707

Impurities, Losartan

Losartan EP Impurity H

$115.00 25 mg

Out of Stock

CAS No.

: 133909-99-6

Mol F.

: C41H37ClN6O

Mol W.

: 665.23

Cat No.

: SA26708

Impurities, Losartan

Losartan EP Impurity I

$395.00 25 mg

Out of Stock

CAS No.

: 1006062-28-7

Mol F.

: C41H37ClN6O

Mol W.

: 665.23

Cat No.

: SA26709

Impurities, Losartan

Losartan Imidazo[1,5-b]isoquinoline Impurity

$795.00 25 mg

Out of Stock

CAS No.

: 165276-38-0

Mol F.

: C22H21ClN6

Mol W.

: 404.9

Cat No.

: SA26721

Impurities, Losartan

Losartan Isomer N2-Trityl Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 150098-04-7

Mol F.

: C41H37ClN6O

Mol W.

: 665.23

Cat No.

: SA26718

Impurities, Losartan

Losartan N,O-Ditrityl Impurity

$175.00 25 mg

Out of Stock

CAS No.

: 1796930-34-1

Mol F.

: C60H51ClN6O

Mol W.

: 907.54

Cat No.

: SA26719

Aspirin, Impurities

m-Salicylic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 99-06-9

Mol F.

: C7H7NO3

Mol W.

: 153.14

Cat No.

: SA28509

Impurities, Manidipine

Manidipine

Please enquire for price & pack size

Out of Stock

CAS No.

: 89226-50-6

Mol F.

: C₃₅H₃₈N₄O₆

Mol W.

: 610.70000000000005

Cat No.

: SA29800

Impurities, Manidipine

Manidipine Dihydrochloride

Please enquire for price & pack size

Out of Stock

CAS No.

: 89226-75-5

Mol F.

: C₃₅H₄₀Cl₂N₄O₆

Mol W.

: 683.63

Cat No.

: SA29804

Impurities, Meclofenamic Acid

Meclofenamic Acid

Please enquire for price & pack size

Out of Stock

CAS No.

: 644-62-2

Mol F.

: C14H11Cl2NO2

Mol W.

: 296.15

Cat No.

: SA10601

Impurities, Medroxyprogesterone Acetate

Medroxyprogesterone Acetate EP Impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 984-47-4

Mol F.

: C24H34O5

Mol W.

: 402.52

Cat No.

: SA27800

Impurities, Medroxyprogesterone Acetate

Medroxyprogestrone Acetate 6α-Hydroxy Impurity

Please enquire for price & pack size

Out of Stock

CAS No.

: 984-46-3

Mol F.

: C24H34O5

Mol W.

: 402.52

Cat No.

: SA27809

Impurities, Medroxyprogesterone Acetate

Medroxyprogestrone Acetate EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 520-85-4

Mol F.

: C22H32O3

Mol W.

: 344.49

Cat No.

: SA27801

Impurities, Medroxyprogesterone Acetate

Medroxyprogestrone Acetate EP Impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C24H34O4

Mol W.

: 386.52

Cat No.

: SA27802

Impurities, Medroxyprogesterone Acetate

Medroxyprogestrone Acetate EP Impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 2242-65-1

Mol F.

: C24H34O4

Mol W.

: 386.52

Cat No.

: SA27803

Impurities, Medroxyprogesterone Acetate

Medroxyprogestrone Acetate EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 32634-95-0

Mol F.

: C24H32O4

Mol W.

: 384.51

Cat No.

: SA27804

Impurities, Medroxyprogesterone Acetate

Medroxyprogestrone Acetate EP Impurity F

Please enquire for price & pack size

Out of Stock

CAS No.

: 69688-15-9

Mol F.

: C24H36O4

Mol W.

: 388.54

Cat No.

: SA27805

Impurities, Medroxyprogesterone Acetate

Medroxyprogestrone Acetate EP Impurity G

Please enquire for price & pack size

Out of Stock

CAS No.

: 595-33-5

Mol F.

: C24H32O4

Mol W.

: 384.51

Cat No.

: SA27806

Impurities, Medroxyprogesterone Acetate

Medroxyprogestrone Acetate EP Impurity H

Please enquire for price & pack size

Out of Stock

CAS No.

: 302-23-8

Mol F.

: C23H32O4

Mol W.

: 372.50

Cat No.

: SA27807

Impurities, Medroxyprogesterone Acetate

Medroxyprogestrone Acetate EP Impurity I

Please enquire for price & pack size

Out of Stock

CAS No.

: NA

Mol F.

: C22H32O3

Mol W.

: 344.49

Cat No.

: SA27808

Impurities, Mesalamine

Mesalamine impurity A

Please enquire for price & pack size

Out of Stock

CAS No.

: 123-30-8

Mol F.

: C₆H₇NO

Mol W.

: 109.13

Cat No.

: SA21300

Impurities, Mesalamine

Mesalamine impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 591-27-5

Mol F.

: C₆H₇NO

Mol W.

: 109.13

Cat No.

: SA21301

Impurities, Mesalamine

Mesalamine impurity C

Please enquire for price & pack size

Out of Stock

CAS No.

: 95-55-6

Mol F.

: C₆H₇NO

Mol W.

: 109.13

Cat No.

: SA21302

Impurities, Mesalamine

Mesalamine impurity D

Please enquire for price & pack size

Out of Stock

CAS No.

: 99-05-8

Mol F.

: C₇H₇NO₂

Mol W.

: 137.13999999999999

Cat No.

: SA21303

Impurities, Mesalamine

Mesalamine impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 65-49-6

Mol F.

: C₇H₇NO₃

Mol W.

: 153.13999999999999

Cat No.

: SA21304

Impurities, Mesalamine

Mesalamine impurity F

Please enquire for price & pack size

Out of Stock

CAS No.

: 570-23-0

Mol F.

: C₇H₇NO₃

Mol W.

: 153.13999999999999

Cat No.

: SA21305

Impurities, Mesalamine

Mesalamine impurity G

Please enquire for price & pack size

Out of Stock

CAS No.

: 490-79-9

Mol F.

: C7H6O4

Mol W.

: 154.12

Cat No.

: SA21306

Impurities, Mesalamine

Mesalamine impurity H

Please enquire for price & pack size

Out of Stock

CAS No.

: 69-72-7

Mol F.

: C₇H₆O₃

Mol W.

: 138.12

Cat No.

: SA21307

Impurities, Mesalamine

Mesalamine impurity J

Please enquire for price & pack size

Out of Stock

CAS No.

: 112725-89-0

Mol F.

: C₇H₈N₂O₃

Mol W.

: 168.15

Cat No.

: SA21309

Impurities, Mesalamine

Mesalamine impurity K

Please enquire for price & pack size

Out of Stock

CAS No.

: 62-53-3

Mol F.

: C₆H₇N

Mol W.

: 93.13

Cat No.

: SA21310

Impurities, Mesalamine

Mesalamine impurity L

Please enquire for price & pack size

Out of Stock

CAS No.

: 118-91-2

Mol F.

: C₇H₅ClO₂

Mol W.

: 156.57

Cat No.

: SA21311

Impurities, Mesalamine

Mesalamine impurity M

Please enquire for price & pack size

Out of Stock

CAS No.

: 2516-96-3

Mol F.

: C₇H₄ClNO₄

Mol W.

: 201.56

Cat No.

: SA21312

Impurities, Mesalamine

Mesalamine impurity N

Please enquire for price & pack size

Out of Stock

CAS No.

: 96-97-9

Mol F.

: C₇H₅NO₅

Mol W.

: 183.12

Cat No.

: SA21313

Impurities, Mesalamine

Mesalamine impurity O

Please enquire for price & pack size

Out of Stock

CAS No.

: 121-57-3

Mol F.

: C₆H₇NO₃S

Mol W.

: 173.19

Cat No.

: SA21314

Impurities, Mesalamine

Mesalamine impurity Q

Please enquire for price & pack size

Out of Stock

CAS No.

: 3970-35-2

Mol F.

: C₇H₄ClNO₄

Mol W.

: 201.56

Cat No.

: SA21316

Impurities, Mesalamine

Mesalamine impurity R

Please enquire for price & pack size

Out of Stock

CAS No.

: 85-38-1

Mol F.

: C₇H₅NO₅

Mol W.

: 183.12

Cat No.

: SA21317

Impurities, Metformin

Metformin

Please enquire for price & pack size

Out of Stock

CAS No.

: 1115-70-4 (HCl salt); 657-24-9 (base)

Mol F.

: C4H12ClN5

Mol W.

: 165.62

Cat No.

: SA27506

Impurities, Metformin

Metformin EP Impurity B

Please enquire for price & pack size

Out of Stock

CAS No.

: 2959-04-8(HClsalt);4405-08-7(base)

Mol F.

: C4H8N8

Mol W.

: 168.16

Cat No.

: SA27501

Impurities, Metformin

Metformin EP Impurity E

Please enquire for price & pack size

Out of Stock

CAS No.

: 1674-62-0 (HCl salt); 1609-00-3 (base)

Mol F.

: C3H9N5

Mol W.

: 115.14

Cat No.

: SA27504

Impurities, Metformin

Metformin EP Impurity F

Please enquire for price & pack size

Out of Stock

CAS No.

: 506-59-2

Mol F.

: C2H8ClN

Mol W.

: 81.54

Cat No.

: SA27505