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.

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Product data	Purity	Price range	Estimated delivery
Sulfamethazine Related Compound B (Mixture containing about 49% of 4-Amino-2-chloro-N-(4,6-dimethylpyrimidin-2-yl)benzenesulfonamide and about 48% of 4-Amino-3-chloro-N-(4,6-dimethylpyrimidin-2-yl)benzenesulfonamide) (DISCONTINUED) REF: 45-1629021	- - -	- - -	Discontinued product
17α-Dihydroequilin (Estra-1,3,5(10),7-tetraene-3,17α-diol) REF: 45-1201002CAS: 651-55-8	- - -	- - -	Discontinued product
Epoprostenol Related Compound B (Sodium 5-(diphenylphosphinoyl)pentanoate) (DISCONTINUED) REF: 45-1237622	- - -	- - -	Discontinued product
Nisoldipine Related Compound E (3-Isobutyl 5-methyl 2,6-dimethyl-4-(2-nitrosophenyl)pyridine-3,5-dicarboxylate) (DISCONTINUED) REF: 45-1464169CAS: 87375-91-5	- - -	- - -	Discontinued product
Probucol Related Compound B (4,4'-dithio-bis(2,6-di-tert-butylphenol)) (DISCONTINUED) REF: 45-1563331	- - -	- - -	Discontinued product
Pamabrom Related Compound A (8-Chlorotheophylline) (DISCONTINUED) REF: 45-1492700CAS: 85-18-7	- - -	- - -	Discontinued product
Probucol Related Compound C (4-[(3,5-di-tert-butyl-2-hydroxyphenylthio)isopropylidenethio]-2,6-di-tert-butylphenol) (DISCONTINUED) REF: 45-1563342CAS: 1391054-68-4	- - -	- - -	Discontinued product
2-Ethylhexan-1-ol (DISCONTINUED) REF: 45-1265526CAS: 104-76-7	- - -	- - -	Discontinued product
Nisoldipine Related Compound D (3-Isobutyl 5-methyl 2,6-dimethyl-4-(2-nitrophenyl)pyridine-3,5-dicarboxylate) (DISCONTINUED) REF: 45-1464158CAS: 103026-83-1	- - -	- - -	Discontinued product
Iscotrizinol Related Compound D (2-Ethylhexyl 4-[(4,6-bis{[4-(tert-butylcarbamoyl)phenyl]amino}-1,3,5-triazin-2-yl)amino]benzoate) (DISCONTINUED) REF: 45-1193390	- - -	- - -	Discontinued product
Eprosartan Related Compound C (2-(thiophen-2-ylmethyl)malonic acid) (DISCONTINUED) REF: 45-1238240CAS: 4475-24-5	- - -	- - -	Discontinued product
Cinacalcet Related Compound B REF: 45-1133911	- - -	- - -	Discontinued product
Ticagrelor R,S-Cyclopropyl Isomer REF: 45-1666979	- - -	- - -	Discontinued product
Orlistat Related Compound D (N-formyl-L-leucine (3S,4R,6S)-3-hexyl-2-oxo-6-undecyltetrahydro-2H-pyran-4-yl ester) (DISCONTINUED) REF: 45-1478844CAS: 130793-27-0	- - -	- - -	Discontinued product
Carglumic Acid Related Compound C REF: 45-1096542	- - -	- - -	Discontinued product
Cinacalcet Related Compound E REF: 45-1133831	- - -	- - -	Discontinued product
Bemotrizinol Impurity Mixture (DISCONTINUED) REF: 45-1048583	- - -	- - -	Discontinued product
Modafinil Related Compound E (Bis(diphenylmethyl)disulfide) (DISCONTINUED) REF: 45-1445380CAS: 1726-02-9	- - -	- - -	Discontinued product
Eprosartan Related Compound E (4-(hydroxymethyl)benzoic acid) (DISCONTINUED) REF: 45-1238262CAS: 3006-96-0	- - -	- - -	Discontinued product
Amiodarone Related Compound G REF: 45-1027379CAS: 1087223-70-8	- - -	- - -	Discontinued product

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Sulfamethazine Related Compound B (Mixture containing about 49% of 4-Amino-2-chloro-N-(4,6-dimethylpyrimidin-2-yl)benzenesulfonamide and about 48% of 4-Amino-3-chloro-N-(4,6-dimethylpyrimidin-2-yl)benzenesulfonamide) (DISCONTINUED)

Sulfonamides, nesoi

Color and Shape:

White Off-White Solid

Ref: 45-1629021

50mg Discontinued Request information

Discontinued product

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17α-Dihydroequilin (Estra-1,3,5(10),7-tetraene-3,17α-diol)

CAS:651-55-8

Estrogens and progestins

Formula:

C₁₈H₂₂O₂

Color and Shape:

White Powder

Molecular weight:

270.16198

Ref: 45-1201002

25mg		Discontinued	Request information
50mg		Discontinued	Request information

Discontinued product

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Epoprostenol Related Compound B (Sodium 5-(diphenylphosphinoyl)pentanoate) (DISCONTINUED)

Prostaglandins, thromboxanes and leukotrienes, their derivatives and structural analogues

Formula:

C₁₇H₁₈NaO₃P

Color and Shape:

White Powder

Molecular weight:

324.08913

Ref: 45-1237622

15mg Discontinued Request information

Discontinued product

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Nisoldipine Related Compound E (3-Isobutyl 5-methyl 2,6-dimethyl-4-(2-nitrosophenyl)pyridine-3,5-dicarboxylate) (DISCONTINUED)

CAS:87375-91-5

Compounds containing an unfused pyridine ring in the structure, nesoi

Formula:

C₂₀H₂₂N₂O₅

Color and Shape:

Green Solid

Molecular weight:

370.15287

Ref: 45-1464169

30mg Discontinued Request information

Discontinued product

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Probucol Related Compound B (4,4'-dithio-bis(2,6-di-tert-butylphenol)) (DISCONTINUED)

Other aromatic organo-sulfur compounds (excluding pesti

Formula:

C₂₈H₄₂O₂S₂

Color and Shape:

Pale Yellow Crystalline Solid

Molecular weight:

474.77

Ref: 45-1563331

25mg Discontinued Request information

Discontinued product

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Pamabrom Related Compound A (8-Chlorotheophylline) (DISCONTINUED)

CAS:85-18-7

Theophylline and aminophylline (excluding fenetylline) and their derivatives, salts thereof, not elsewhere specified or included

Formula:

C₇H₇ClN₄O₂

Color and Shape:

Powder

Molecular weight:

214.02575

Ref: 45-1492700

30mg Discontinued Request information

Discontinued product

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Probucol Related Compound C (4-[(3,5-di-tert-butyl-2-hydroxyphenylthio)isopropylidenethio]-2,6-di-tert-butylphenol) (DISCONTINUED)

CAS:1391054-68-4

Other aromatic organo-sulfur compounds (excluding pesti

Formula:

C₃₁H₄₈O₂S₂

Color and Shape:

Powder

Molecular weight:

516.86

Ref: 45-1563342

25mg Discontinued Request information

Discontinued product

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2-Ethylhexan-1-ol (DISCONTINUED)

CAS:104-76-7

2-ethylhexan-1-ol (octyl alcohol)

Formula:

C₈H₁₈O

Color and Shape:

Liquid

Molecular weight:

130.22 g/mol

Ref: 45-1265526

1.5ml Discontinued Request information

Discontinued product

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Nisoldipine Related Compound D (3-Isobutyl 5-methyl 2,6-dimethyl-4-(2-nitrophenyl)pyridine-3,5-dicarboxylate) (DISCONTINUED)

CAS:103026-83-1

Compounds containing an unfused pyridine ring in the structure, nesoi

Formula:

C₂₀H₂₂N₂O₆

Color and Shape:

Pale Yellow Solid

Molecular weight:

386.14779

Ref: 45-1464158

30mg Discontinued Request information

Discontinued product

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Iscotrizinol Related Compound D (2-Ethylhexyl 4-[(4,6-bis{[4-(tert-butylcarbamoyl)phenyl]amino}-1,3,5-triazin-2-yl)amino]benzoate) (DISCONTINUED)

Compounds (excluding melamine) containing an unfused triazine ring (whether or not hydrogenated) in the structure

Formula:

C₄₀H₅₂N₈O₄

Color and Shape:

White Powder

Molecular weight:

708.41115

Ref: 45-1193390

25mg Discontinued Request information

Discontinued product

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Eprosartan Related Compound C (2-(thiophen-2-ylmethyl)malonic acid) (DISCONTINUED)

CAS:4475-24-5

Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds, nesoi

Formula:

C₈H₈O₄S

Color and Shape:

White Powder

Molecular weight:

200.01433

Ref: 45-1238240

25mg Discontinued Request information

Discontinued product

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Cinacalcet Related Compound B

Aromatic monoamines and their derivatives, salts thereof, nesoi

Formula:

C₃₂H₃₁F₆N

Color and Shape:

Brown Liquid

Molecular weight:

543.6

Ref: 45-1133911

Undefined size Discontinued Request information

Discontinued product

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Ticagrelor R,S-Cyclopropyl Isomer

Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, …

Formula:

C₂₃H₂₈F₂N₆O₄S

Molecular weight:

522.18608

Ref: 45-1666979

Undefined size Discontinued Request information

Discontinued product

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Orlistat Related Compound D (N-formyl-L-leucine (3S,4R,6S)-3-hexyl-2-oxo-6-undecyltetrahydro-2H-pyran-4-yl ester) (DISCONTINUED)

CAS:130793-27-0

Lactones, nesoi

Formula:

C₂₉H₅₃NO₅

Color and Shape:

Liquid

Molecular weight:

495.39237

Ref: 45-1478844

10mg Discontinued Request information

Discontinued product

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Carglumic Acid Related Compound C

Acyclic amides (including acyclic carbamates) and their derivatives and salts thereof, nesoi

Formula:

C₁₁H₁₇N₃O₈

Color and Shape:

Off-White Powder

Molecular weight:

319.10156

Ref: 45-1096542

Undefined size Discontinued Request information

Discontinued product

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Cinacalcet Related Compound E

Aromatic alcohols and their halogenated, sulfonated, nitrated or nitrosated derivatives not elsewhere specified or included

Formula:

C₁₀H₁₁F₃O

Color and Shape:

Colorless Clear Light Yellow Light Brown Liquid

Molecular weight:

204.0762

Ref: 45-1133831

Undefined size Discontinued Request information

Discontinued product

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Bemotrizinol Impurity Mixture (DISCONTINUED)

Diagnostic or lab reagents on a backing, prepared diagnostic or lab reagents whether or not …

Color and Shape:

Light Yellow Powder

Ref: 45-1048583

100mg Discontinued Request information

Discontinued product

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Modafinil Related Compound E (Bis(diphenylmethyl)disulfide) (DISCONTINUED)

CAS:1726-02-9

Other aromatic organo-sulfur compounds (excluding pesticides)

Formula:

C₂₆H₂₂S₂

Color and Shape:

White Powder

Molecular weight:

398.11629

Ref: 45-1445380

20mg Discontinued Request information

Discontinued product

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Eprosartan Related Compound E (4-(hydroxymethyl)benzoic acid) (DISCONTINUED)

CAS:3006-96-0

Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides etc not elsewhere specified …

Formula:

C₈H₈O₃

Color and Shape:

Beige White Powder

Molecular weight:

152.04734

Ref: 45-1238262

15mg Discontinued Request information

Discontinued product

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Amiodarone Related Compound G

CAS:1087223-70-8

Aromatic heterocyclic compounds with oxygen hetero-atom(s) only, nesoi

Formula:

C₂₆H₃₁I₂NO₄

Molecular weight:

675.03425

Ref: 45-1027379

Undefined size Discontinued Request information

Discontinued product

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