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Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

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Reference Standard

Zolpidem IV chemical structure

CAS: 768398-03-4
Formula: C₁₇H₁₅N₃
MW: 261.32 g/mol

VQ-044865

Reference Standard

Zolpidem Related Compound C chemical structure

Zolpidem Related Compound C

CAS: 349122-64-1
Formula: C₁₄H₁₄N₂O
MW: 226.27 g/mol

VQ-044867

Reference Standard

Zolpidem Tartrate - Impurity A chemical structure

Zolpidem Tartrate - Impurity A

CAS: 1346600-85-8
Formula: C₁₉H₂₁N₃O
MW: 307.4 g/mol

VQ-034759

Reference Standard

Zolpidic acid chemical structure

CAS: 189005-44-5
Formula: C₁₇H₁₆N₂O₂
MW: 280.32 g/mol

VQ-034761

Reference Standard

Zonisamide N,N-Dimethylformimidamide chemical structure

Zonisamide N,N-Dimethylformimidamide

CAS: 1217201-89-2
Formula: C₁₁H₁₃N₃O₃S
MW: 267.31 g/mol

VQ-024060

Reference Standard

Zopiclone Impurity 2 chemical structure

Zopiclone Impurity 2

CAS: 43200-82-4
Formula: C₁₁H₅ClN₄O₂
MW: 260.63 g/mol

In stock

Reference Standard

Zotepine S-Oxide chemical structure

Zotepine S-Oxide

CAS: 78105-23-4
Formula: C₁₈H₁₈ClNO₂S
MW: 347.9 g/mol

VQ-043019

Reference Standard

Zuclomiphene citrate chemical structure

Zuclomiphene citrate

CAS: 7619-53-6
Formula: C₃₂H₃₆ClNO₈
MW: 598.1 g/mol

VQ-025046

Reference Standard

Zymosterol chemical structure

CAS: 128-33-6
Formula: C₂₇H₄₄O
MW: 384.6 g/mol

VQ-036283

Reference Standard

ZZ1 Trilostane Impurity

ZZ1 Trilostane Impurity

CAS: 89999-17-7
Formula: C₂₀H₂₇NO₂
MW: 313.43 g/mol

In stock

Reference Standard

α-(2,3-Dimethylphenyl)-1-(trityl)-1H-imidazole-4-methanol chemical structure

α-(2,3-Dimethylphenyl)-1-(trityl)-1H-imidazole-4-methanol

CAS: 176721-01-0
Formula: C₃₁H₂₈N₂O
MW: 444.6 g/mol

VQ-026583

Reference Standard

α-[[[2-(4-Methoxyphenyl)-1-methylethyl](phenylmethyl)amino]methyl]-3-nitro-4-(phenylmethoxy)benzenemethanol chemical structure

α-[[[2-(4-Methoxyphenyl)-1-methylethyl](phenylmethyl)amino]methyl]-3-nitro-4-(phenylmethoxy)benzenemethanol

CAS: 43229-67-0
Formula: C₃₂H₃₄N₂O₅
MW: 526.6 g/mol

VQ-037419

Reference Standard

α-Bisabolol Oxide B chemical structure

α-Bisabolol Oxide B

CAS: 26184-88-3
Formula: C₁₅H₂₆O₂
MW: 238.37 g/mol

VQ-044684

Reference Standard

α-Chloro-2',5'-dihydroxyacetophenone chemical structure

α-Chloro-2',5'-dihydroxyacetophenone

CAS: 60912-82-5
Formula: C₈H₇ClO₃
MW: 186.59 g/mol

VQ-031273

Reference Standard

α-Decitabine-3',5'-bis(4-chlorobenzoate) chemical structure

α-Decitabine-3',5'-bis(4-chlorobenzoate)

CAS: 1140891-02-6
Formula: C₂₂H₁₈Cl₂N₄O₆
MW: 505.3 g/mol

VQ-022319

Reference Standard

α-Dihydroartemisinin chemical structure

α-Dihydroartemisinin

CAS: 81496-81-3
Formula: C₁₅H₂₄O₅
MW: 284.35 g/mol

VQ-029221

Reference Standard

α-Ethyl Norepinephrine Hydrochloride chemical structure

α-Ethyl Norepinephrine Hydrochloride

CAS: 3198-07-0
Formula: C₁₀H₁₆ClNO₃
MW: 233.69 g/mol

VQ-038686

Reference Standard

α-Ethyl-3,4-dimethoxy-Benzeneacetonitrile chemical structure

α-Ethyl-3,4-dimethoxy-Benzeneacetonitrile

CAS: 39066-05-2
Formula: C₁₂H₁₅NO₂
MW: 205.25 g/mol

VQ-034587

Reference Standard

α-Formyl-(3-endo)-8-methyl-8-azabicyclo[3.2.1]oct-3-yl benzeneacetic Acidester chemical structure

α-Formyl-(3-endo)-8-methyl-8-azabicyclo[3.2.1]oct-3-yl benzeneacetic Acidester

CAS: 22226-37-5
Formula: C₁₇H₂₁NO₃
MW: 287.35 g/mol

VQ-026090

Reference Standard

α-Phenyl-α-(2-propyn-1-yloxy)benzeneacetic Acid chemical structure

α-Phenyl-α-(2-propyn-1-yloxy)benzeneacetic Acid

CAS: 2766-01-0
Formula: C₁₇H₁₄O₃
MW: 266.29 g/mol

VQ-034460

Reference Standard

α,α-Diisopropylhomoveratronitrile chemical structure

α,α-Diisopropylhomoveratronitrile

CAS: 51698-54-5
Formula: C₁₆H₂₃NO₂
MW: 261.36 g/mol

VQ-028680

Reference Standard

α,α-Diphenyl-γ-butyrolactone chemical structure

α,α-Diphenyl-γ-butyrolactone

CAS: 956-89-8
Formula: C₁₆H₁₄O₂
MW: 238.28 g/mol

VQ-048926

Reference Standard

α,α,α',5-Tetramethyl-1,3-benzenediacetonitrile chemical structure

α,α,α',5-Tetramethyl-1,3-benzenediacetonitrile

CAS: 120512-38-1
Formula: C₁₄H₁₆N₂
MW: 212.29 g/mol

VQ-035737

Reference Standard

β-Apo-8-carotenal chemical structure

β-Apo-8-carotenal

CAS: 1107-26-2
Formula: C₃₀H₄₀O
MW: 416.6 g/mol

VQ-032532

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