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Impurities & Reference Standards

Pharmacopoeial and non-pharmacopoeial impurities, metabolites, nitrosamines and working standards with characterisation data for QC and regulatory work.

28,554products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,252 Pharmacopeial Impurities (EP / USP / BP) 4,401 Nitrosamine Impurities 650 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,612 Metabolites & Degradation Products 4,146 API Reference Standards 3,493

Reference Standard

4-Oxo-all-trans Retinoic Acid chemical structure

4-Oxo-all-trans Retinoic Acid

CAS: 38030-57-8
Formula: C₂₀H₂₆O₃
MW: 314.4 g/mol

VQ-026244

Reference Standard

4-Oxovalproic Acid chemical structure

4-Oxovalproic Acid

CAS: 688-04-0
Formula: C₈H₁₄O₃
MW: 158.19 g/mol

VQ-034527

Reference Standard

4-Phenethyl-piperidine chemical structure

4-Phenethyl-piperidine

CAS: 24152-41-8
Formula: C₁₃H₁₉N
MW: 189.3 g/mol

VQ-049539

Reference Standard

4-Phenoxybenzoic acid chemical structure

4-Phenoxybenzoic acid

CAS: 2215-77-2
Formula: C₁₃H₁₀O₃
MW: 214.22 g/mol

VQ-044699

Reference Standard

4-Phenoxyphthalonitrile chemical structure

4-Phenoxyphthalonitrile

CAS: 38791-62-7
Formula: C₁₄H₈N₂O
MW: 220.23 g/mol

In stock

Reference Standard

4-Phenybutyl-2-Carboxyethylphosphinic Acid chemical structure

4-Phenybutyl-2-Carboxyethylphosphinic Acid

CAS: 83623-61-4
Formula: C₁₂H₁₇O₄P
MW: 256.23 g/mol

VQ-048468

Reference Standard

4-Phenyl Thio Benzyl Chloride chemical structure

4-Phenyl Thio Benzyl Chloride

CAS: 1208-87-3
Formula: C₁₃H₁₁ClS
MW: 234.74 g/mol

VQ-030712

Reference Standard

4-Phenyl-1-butylamine chemical structure

4-Phenyl-1-butylamine

CAS: 13214-66-9
Formula: C₁₀H₁₅N
MW: 149.23 g/mol

VQ-045226

Reference Standard

4-Phenyl-4-piperidinecarboxylic Acid 4-Methylbenzenesulfonate

4-Phenyl-4-piperidinecarboxylic Acid 4-Methylbenzenesulfonate

CAS: 83949-32-0
Formula: C₁₉H₂₃NO₅S
MW: 377.45 g/mol

VQ-049877

Reference Standard

4-Phenylbutan-2-ol chemical structure

4-Phenylbutan-2-ol

CAS: 2344-70-9
Formula: C₁₀H₁₄O
MW: 150.22 g/mol

VQ-023387

Reference Standard

4-Phenylbutyl Acetate chemical structure

4-Phenylbutyl Acetate

CAS: 7492-40-2
Formula: C₁₂H₁₆O₂
MW: 192.25 g/mol

VQ-032632

Reference Standard

4-Phenylbutylchlorodimethylsilane chemical structure

4-Phenylbutylchlorodimethylsilane

CAS: 32328-67-9
Formula: C₁₂H₁₉ClSi
MW: 226.82 g/mol

VQ-040395

Reference Standard

4-Phenylbutylphosphonic Acid chemical structure

4-Phenylbutylphosphonic Acid

CAS: 46348-61-2
Formula: C₁₀H₁₅O₃P
MW: 214.2 g/mol

VQ-037432

Reference Standard

4-Phenylpiperidine-4-ol chemical structure

4-Phenylpiperidine-4-ol

CAS: 40807-61-2
Formula: C₁₁H₁₅NO
MW: 177.24 g/mol

VQ-031050

Reference Standard

4-Phenylsulfonylaniline chemical structure

4-Phenylsulfonylaniline

CAS: 7019-01-4
Formula: C₁₂H₁₁NO₂S
MW: 233.29 g/mol

VQ-030042

Reference Standard

4-Phenyltoluene chemical structure

4-Phenyltoluene

CAS: 644-08-6
Formula: C₁₃H₁₂
MW: 168.23 g/mol

VQ-043931

Reference Standard

4-Piperidinol-D9 Hydrochloride chemical structure

4-Piperidinol-D9 Hydrochloride

CAS: 2732762-46-6
Formula: C₅H₁₂ClNO
MW: 146.66 g/mol

VQ-052473

Reference Standard

4-Piperidinopiperidine-1-carbonyl Chloride chemical structure

4-Piperidinopiperidine-1-carbonyl Chloride

CAS: 103816-19-9
Formula: C₁₁H₁₉ClN₂O
MW: 230.73 g/mol

VQ-043718

Reference Standard

4-Piperidyl n-(2-biphenyl)carbamate chemical structure

4-Piperidyl n-(2-biphenyl)carbamate

CAS: 171722-92-2
Formula: C₁₈H₂₀N₂O₂
MW: 296.4 g/mol

VQ-033515

Reference Standard

4-Pregnen-17alpha,20alpha-diol-3-one chemical structure

4-Pregnen-17alpha,20alpha-diol-3-one

CAS: 652-69-7
Formula: C₂₁H₃₂O₃
MW: 332.5 g/mol

VQ-041695

Reference Standard

4-Propyldihydrofuran-2(3H)-one chemical structure

4-Propyldihydrofuran-2(3H)-one

CAS: 72397-60-5
Formula: C₇H₁₂O₂
MW: 128.17 g/mol

VQ-027483

Reference Standard

4-Pyridylacetic acid hydrochloride chemical structure

4-Pyridylacetic acid hydrochloride

CAS: 6622-91-9
Formula: C₇H₈ClNO₂
MW: 173.6 g/mol

VQ-041929

Reference Standard

4-Sulfate Aminoantipyrine chemical structure

4-Sulfate Aminoantipyrine

CAS: 1759-26-8
Formula: C₁₁H₁₃N₃O₄S
MW: 283.31 g/mol

VQ-043885

Reference Standard

4-Tert-Butylbenzenesulfonic acid chemical structure

4-Tert-Butylbenzenesulfonic acid

CAS: 1133-17-1
Formula: C₁₀H₁₄O₃S
MW: 214.28 g/mol

VQ-029479

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