Product correctly added to cart.

  1. Home
  2. Chemical Compounds
  3. Reference Standards (CRS)
  4. Pharmaceutical Standards
  5. Active Pharmaceutical Ingredients (API) for research
  6. Active pharmaceutical ingredient (API) impurities for research
No image
No image

Active pharmaceutical ingredient (API) impurities for research

All products contained in this category are intended for laboratory use only, and are not meant for human consumption.

Read more
Sort by

See more categories

This search does not contain any category.

  • 20
    • 50
    • 100
    • 200

products per page. 3405 products on this category.

BrandProduct dataPurityPrice rangeEstimated delivery
Biosynth logo
6,7,8,9-Tetrahydro-3-[2-[4-(6-hydroxy-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one
REF: 3D-IT21195CAS: 106266-11-9 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
Montelukast acyl-b-D-glucuronide acetic acid salt
REF: 3D-MM07213CAS: 188717-17-1 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
Pioglitazone Pyridine-6-[4-[2-[5-ethyl-6-[4-[2-(5-ethyl-2-pyridinyl)ethoxy]phenyl]
REF: 3D-IP165311CAS: 669716-56-7 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
Calcipotriol EP Impurity I
REF: 3D-FC177663		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
(R)-7-(But-2-yn-1-yl)-8-(3-(1,3-Dioxoisoindolin-2-yl)piperidin-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-1H-purine-2,6(3H,7 H)-dione
REF: 3D-IB138938CAS: 886588-63-2 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
Ciprofloxacin impurity D hydrochloride
REF: 3D-IC58174CAS: 526204-10-4 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
Ivermectin B1 aglycon
REF: 3D-II178593CAS: 73162-95-5 		Min. 95%436.00 €~2,087.00 €Mon 27 Jan 25
Biosynth logo
Albendazole impurity F
REF: 3D-IA71873CAS: 80983-45-5 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
3-[(1E)-2-[4-[[(2-Carboxyethyl)amino]carbonyl]phenyl]diazenyl] balsalazide
REF: 3D-IC19769CAS: 1242567-11-8 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
1-[[4-(3-Methoxypropoxy)-3-methyl-2-pyridinyl]methyl]-2-[[[4-(3-methoxypropoxy)-3-methyl-2-pyridinyl]methyl]sulfonyl]-1H-benzimidazo le
REF: 3D-IM25352CAS: 1246818-79-0 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
2,12-Dihydro-1,3-dimethyl-9-methoxy-12-thioxobenzo [4,5] pyrido [1,2-c] imidazo [1,2-a] imidazol-2-one
REF: 3D-ID57925CAS: 125656-83-9 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
rac-N-Desisopropyl-N-ethyl acebutolol
REF: 3D-IR27557CAS: 441019-91-6 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
Amido methyl meloxicam
REF: 3D-IA17352CAS: 892395-41-4 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
N,N-Dimethyl-2-[6-methyl-2-(2-bromo-4-methylphenyl)imidazol[1,2-a]pyridin-3-yl]acetamide
REF: 3D-ID57808CAS: 361480-89-9 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
Ambroxol hydrochloride impurity C
REF: 3D-IA63604CAS: 50910-53-7 		Min. 95%136.00 €~518.00 €Mon 27 Jan 25
Biosynth logo
Methyl 3-aminocrotonate
REF: 3D-IM57964CAS: 14205-39-1 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]ethanol N-oxide
REF: 3D-ID27365CAS: 1076199-40-0 		Min. 95%503.00 €~2,811.00 €Mon 27 Jan 25
Biosynth logo
N-Debenzoyl-N-hexanoylpaclitaxel
REF: 3D-ID26723CAS: 153415-45-3 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
1-[2-(3-Chloro-2-hydroxypropoxy)phenyl]-3-phenyl-1-propanone
REF: 3D-IC21067CAS: 165279-79-8 		Min. 95%To inquireMon 27 Jan 25
Biosynth logo
2-[(4-Chloro-3-methyl-2-pyridinyl)methylthio]-1H-benzimidazole
REF: 3D-IC21227CAS: 103312-62-5 		Min. 95%To inquireMon 27 Jan 25
discount label
6,7,8,9-Tetrahydro-3-[2-[4-(6-hydroxy-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-2-methyl-4H-pyri…
Biosynth logo
+ info

6,7,8,9-Tetrahydro-3-[2-[4-(6-hydroxy-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one

CAS:106266-11-9
Tetrahydro-3-[2-[4-(6-hydroxy-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (THPP) is a drug product that belongs to the class of drugs used for …
Formula:
C23H28N4O3
Purity:
Min. 95%
Molecular weight:
408.49 g/mol

Ref: 3D-IT21195

1mgTo inquire
2mgTo inquire
5mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
Montelukast acyl-b-D-glucuronide acetic acid salt
Biosynth logo
+ info

Montelukast acyl-b-D-glucuronide acetic acid salt

CAS:188717-17-1
Metabolite of montelukast
Formula:
C41H44ClNO9S·CH3CO2H
Purity:
Min. 95%
Color and Shape:
Off-White Powder
Molecular weight:
822.36 g/mol

Ref: 3D-MM07213

1mgTo inquire
2mgTo inquire
5mgTo inquire
10mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
Pioglitazone Pyridine-6-[4-[2-[5-ethyl-6-[4-[2-(5-ethyl-2-pyridinyl)ethoxy]phenyl]
Biosynth logo
+ info

Pioglitazone Pyridine-6-[4-[2-[5-ethyl-6-[4-[2-(5-ethyl-2-pyridinyl)ethoxy]phenyl]

CAS:669716-56-7
Pioglitazone Pyridine-6-[4-[2-[5-ethyl-6-[4-[2-(5-ethyl-2-pyridinyl)ethoxy]phenyl]propionamido]-1,3,4-thiadiazol-2(3H)-ylidene]aminocarbonyl]-1,3,4-thiadiazole is a drug that belongs to the group of thiazolidinediones. It is an …
Formula:
C34H35N3O4S
Purity:
Min. 95%
Molecular weight:
581.73 g/mol

Ref: 3D-IP165311

1mgTo inquire
2mgTo inquire
5mgTo inquire
10mgTo inquire
25mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
Calcipotriol EP Impurity I
Biosynth logo
+ info

Calcipotriol EP Impurity I

Calcipotriol EP Impurity I is a metabolite of calcipotriol which acts as a natural, synthetic …
Formula:
C27H40O3
Purity:
Min. 95%
Molecular weight:
412.6 g/mol

Ref: 3D-FC177663

10mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
(R)-7-(But-2-yn-1-yl)-8-(3-(1,3-Dioxoisoindolin-2-yl)piperidin-1-yl)-3-methyl-1-((4-methylquinazol…
Biosynth logo
+ info

(R)-7-(But-2-yn-1-yl)-8-(3-(1,3-Dioxoisoindolin-2-yl)piperidin-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-1H-purine-2,6(3H,7 H)-dione

CAS:886588-63-2
7-(But-2-yn-1-yl)-8-(3-(1,3-Dioxoisoindolin-2-yl)piperidin-1-yl)-3-methyl-1-(4-methylquinazolin-2(4H)-yl)methyl)-1H -purine-2,6(3H,7H)-dione is a synthetic drug that has been modified to have a higher flow …
Formula:
C33H30N8O4
Purity:
Min. 95%
Molecular weight:
602.64 g/mol

Ref: 3D-IB138938

5mgTo inquire
10mgTo inquire
25mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
Ciprofloxacin impurity D hydrochloride
Biosynth logo
+ info

Ciprofloxacin impurity D hydrochloride

CAS:526204-10-4
Ciprofloxacin impurity D hydrochloride is a drug product that is an analytical standard. It is …
Formula:
C17H18ClN3O3·HCl
Purity:
Min. 95%
Molecular weight:
384.26 g/mol

Ref: 3D-IC58174

1mgTo inquire
2mgTo inquire
5mgTo inquire
10mgTo inquire
25mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
Ivermectin B1 aglycon
Biosynth logo
+ info

Ivermectin B1 aglycon

CAS:73162-95-5
Ivermectin B1 aglycon is a drug product that is custom synthesized, high purity, and analytical. …
Formula:
C34H50O8
Purity:
Min. 95%
Molecular weight:
586.8 g/mol

Ref: 3D-II178593

1mg436.00 €
2mg582.00 €
5mg740.00 €
10mg1,160.00 €
25mg2,087.00 €
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
Albendazole impurity F
Biosynth logo
+ info

Albendazole impurity F

CAS:80983-45-5
Albendazole is an anti-helminthic drug that is structurally classified as a benzimidazole. It has been …
Formula:
C10H11N3O2S
Purity:
Min. 95%
Molecular weight:
237.28 g/mol

Ref: 3D-IA71873

5mgTo inquire
10mgTo inquire
25mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
3-[(1E)-2-[4-[[(2-Carboxyethyl)amino]carbonyl]phenyl]diazenyl] balsalazide
Biosynth logo
+ info

3-[(1E)-2-[4-[[(2-Carboxyethyl)amino]carbonyl]phenyl]diazenyl] balsalazide

CAS:1242567-11-8
3-[(1E)-2-[4-[[(2-Carboxyethyl)amino]carbonyl]phenyl]diazenyl] balsalazide is a white to off-white solid that is soluble in water and acidic …
Formula:
C27H24N6O9
Purity:
Min. 95%
Molecular weight:
576.51 g/mol

Ref: 3D-IC19769

1mgTo inquire
2mgTo inquire
5mgTo inquire
10mgTo inquire
25mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
1-[[4-(3-Methoxypropoxy)-3-methyl-2-pyridinyl]methyl]-2-[[[4-(3-methoxypropoxy)-3-methyl-2-pyridin…
Biosynth logo
+ info

1-[[4-(3-Methoxypropoxy)-3-methyl-2-pyridinyl]methyl]-2-[[[4-(3-methoxypropoxy)-3-methyl-2-pyridinyl]methyl]sulfonyl]-1H-benzimidazo le

CAS:1246818-79-0
1-[[4-(3-Methoxypropoxy)-3-methyl-2-pyridinyl]methyl]-2-[(4-(3-methoxypropoxy)-3-methyl-2-pyridinyl)methylsulfonyl]-1H-benzimidazole (MKC1807) is a synthetic drug product. MKC1807 is an analytical standard in the HPLC …
Formula:
C29H36N4O6S
Purity:
Min. 95%
Molecular weight:
568.69 g/mol

Ref: 3D-IM25352

1mgTo inquire
2mgTo inquire
5mgTo inquire
10mgTo inquire
25mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
2,12-Dihydro-1,3-dimethyl-9-methoxy-12-thioxobenzo [4,5] pyrido [1,2-c] imidazo [1,2-a] imidazol-2…
Biosynth logo
+ info

2,12-Dihydro-1,3-dimethyl-9-methoxy-12-thioxobenzo [4,5] pyrido [1,2-c] imidazo [1,2-a] imidazol-2-one

CAS:125656-83-9
2,12-Dihydro-1,3-dimethyl-9-methoxy-12-thioxobenzo [4,5] pyrido [1,2-c] imidazo [1,2-a] imidazol-2-one is a synthetic compound that has not been …
Formula:
C16H13N3O2S
Purity:
Min. 95%
Molecular weight:
311.36 g/mol

Ref: 3D-ID57925

10mgTo inquire
25mgTo inquire
50mgTo inquire
100mgTo inquire
250mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
rac-N-Desisopropyl-N-ethyl acebutolol
Biosynth logo
+ info

rac-N-Desisopropyl-N-ethyl acebutolol

CAS:441019-91-6
rac-N-Desisopropyl-N-ethyl acebutolol is a synthetic drug product. It is an analytical standard for the impurity, …
Formula:
C17H26N2O4
Purity:
Min. 95%
Molecular weight:
322.4 g/mol

Ref: 3D-IR27557

5mgTo inquire
10mgTo inquire
25mgTo inquire
50mgTo inquire
100mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
Amido methyl meloxicam
Biosynth logo
+ info

Amido methyl meloxicam

CAS:892395-41-4
Amido methyl meloxicam is a synthetic nonsteroidal anti-inflammatory drug. It is used to relieve inflammation …
Formula:
C15H15N3O4S2
Purity:
Min. 95%
Molecular weight:
365.43 g/mol

Ref: 3D-IA17352

1mgTo inquire
2mgTo inquire
5mgTo inquire
10mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
N,N-Dimethyl-2-[6-methyl-2-(2-bromo-4-methylphenyl)imidazol[1,2-a]pyridin-3-yl]acetamide
Biosynth logo
+ info

N,N-Dimethyl-2-[6-methyl-2-(2-bromo-4-methylphenyl)imidazol[1,2-a]pyridin-3-yl]acetamide

CAS:361480-89-9
N,N-Dimethyl-2-[6-methyl-2-(2-bromo-4-methylphenyl)imidazol[1,2-a]pyridin-3-yl]acetamide is a drug product that has not yet been fully characterized. It is a …
Formula:
C19H20BrN3O
Purity:
Min. 95%
Molecular weight:
386.29 g/mol

Ref: 3D-ID57808

1mgTo inquire
5mgTo inquire
10mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
Ambroxol hydrochloride impurity C
Biosynth logo
+ info

Ambroxol hydrochloride impurity C

CAS:50910-53-7
Ambroxol hydrochloride impurity C is a by-product of ambroxol hydrochloride. It is a diammonium salt …
Formula:
C13H16Br2N2O·HCl
Purity:
Min. 95%
Molecular weight:
412.55 g/mol

Ref: 3D-IA63604

1mg136.00 €
2mg172.00 €
5mg248.00 €
10mg364.00 €
25mg518.00 €
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
Methyl 3-aminocrotonate
Biosynth logo
+ info

Methyl 3-aminocrotonate

CAS:14205-39-1
Methyl 3-aminocrotonate is an intermediate in the synthesis of pyridinedicarboxylic acid. It is a white …
Formula:
C5H9NO2
Purity:
Min. 95%
Color and Shape:
White To Yellow Solid
Molecular weight:
115.13 g/mol

Ref: 3D-IM57964

1kgTo inquire
50gTo inquire
100gTo inquire
250gTo inquire
500gTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]ethanol N-oxide
Biosynth logo
+ info

2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]ethanol N-oxide

CAS:1076199-40-0
2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]ethanol N-oxide is a peroxide that is used in pharmaceutical preparations as an antioxidant. It …
Formula:
C21H25N3O3S
Purity:
Min. 95%
Color and Shape:
Tan to pale orange solid.
Molecular weight:
399.51 g/mol

Ref: 3D-ID27365

1mg503.00 €
2mg716.00 €
5mg1,022.00 €
10mg1,599.00 €
25mg2,811.00 €
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
N-Debenzoyl-N-hexanoylpaclitaxel
Biosynth logo
+ info

N-Debenzoyl-N-hexanoylpaclitaxel

CAS:153415-45-3
N-Debenzoyl-N-hexanoylpaclitaxel (DHBPTx) is an analog of paclitaxel. It inhibits cell proliferation by binding to the …
Formula:
C46H57NO14
Purity:
Min. 95%
Molecular weight:
847.94 g/mol

Ref: 3D-ID26723

25mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
1-[2-(3-Chloro-2-hydroxypropoxy)phenyl]-3-phenyl-1-propanone
Biosynth logo
+ info

1-[2-(3-Chloro-2-hydroxypropoxy)phenyl]-3-phenyl-1-propanone

CAS:165279-79-8
1-[2-(3-Chloro-2-hydroxypropoxy)phenyl]-3-phenyl-1-propanone is a synthetic drug product. It is an impurity standard for HPLC, and drug …
Formula:
C18H19ClO3
Purity:
Min. 95%
Molecular weight:
318.79 g/mol

Ref: 3D-IC21067

10mgTo inquire
25mgTo inquire
50mgTo inquire
100mgTo inquire
250mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
discount label
2-[(4-Chloro-3-methyl-2-pyridinyl)methylthio]-1H-benzimidazole
Biosynth logo
+ info

2-[(4-Chloro-3-methyl-2-pyridinyl)methylthio]-1H-benzimidazole

CAS:103312-62-5
2-[(4-Chloro-3-methyl-2-pyridinyl)methylthio]-1H-benzimidazole is a drug product. It is an impurity standard for the analytical determination of …
Formula:
C14H12ClN3S
Purity:
Min. 95%
Molecular weight:
289.78 g/mol

Ref: 3D-IC21227

2mgTo inquire
5mgTo inquire
10mgTo inquire
25mgTo inquire
50mgTo inquire
Estimated delivery in United States, on Monday 27 Jan 2025
+ info
Welcome to CymitQuimica!We use cookies to enhance your visit. We do not include advertising.

Please see our Cookies Policy for more details or adjust your preferences in "Settings".