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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

Neostigmine Impurity 13 Metilsulfate chemical structure

Neostigmine Impurity 13 Metilsulfate

CAS: 64050-77-7
Formula: C₁₂H₂₀N₂O₆S
MW: 320.36 g/mol

VQ-045340

Reference Standard

Neostigmine Impurity 14 Metilsulfate chemical structure

Neostigmine Impurity 14 Metilsulfate

CAS: 64051-18-9
Formula: C₁₁H₁₈N₂O₆S
MW: 306.34 g/mol

VQ-045341

Reference Standard

Neostigmine Methyl Sulfate - Impurity A (Bromide Salt) chemical structure

Neostigmine Methyl Sulfate - Impurity A (Bromide Salt)

CAS: 1620-19-5
Formula: C₉H₁₄BrNO
MW: 232.12 g/mol

VQ-044425

Reference Standard

Neostigmine methyl sulphate chemical structure

Neostigmine methyl sulphate

CAS: 51-60-5
Formula: C₁₃H₂₂N₂O₆S
MW: 334.39 g/mol

VQ-026869

Reference Standard

Neotame Impurity 3 chemical structure

Neotame Impurity 3

CAS: 271582-82-2
Formula: C₂₆H₄₀N₂O₅
MW: 460.6 g/mol

VQ-038586

Reference Standard

Neotame Monohydrate chemical structure

Neotame Monohydrate

CAS: 243116-62-3
Formula: C₂₀H₃₂N₂O₆
MW: 396.5 g/mol

VQ-049213

Reference Standard

Neotame USP Related Compound A chemical structure

Neotame USP Related Compound A

CAS: 190910-14-6
Formula: C₁₉H₂₈N₂O₅
MW: 364.4 g/mol

VQ-026870

Reference Standard

Neoxanthin chemical structure

CAS: 14660-91-4
Formula: C₄₀H₅₆O₄
MW: 600.9 g/mol

VQ-040595

Reference Standard

Nepafenac chemical structure

CAS: 78281-72-8
Formula: C₁₅H₁₄N₂O₂
MW: 254.28 g/mol

In stock

Reference Standard

Nepafenac Impurity B chemical structure

Nepafenac Impurity B

CAS: 78281-61-5
Formula: C₁₆H₁₆N₂O₂S
MW: 300.4 g/mol

VQ-023227

Reference Standard

Nepafenac Impurity B / Monomethyl amide

Nepafenac Impurity B / Monomethyl amide

CAS: 78281-75-1
Formula: C₁₆H₁₆N₂O₂
MW: 268.31 g/mol

VQ-023230

Reference Standard

Nepafenac Impurity C

Nepafenac Impurity C

CAS: 2731586-58-4
Formula: C₁₅H₁₃ClN₂O₂
MW: 288.73 g/mol

VQ-023229

Reference Standard

Nepafenac-d5 chemical structure

CAS: 1246814-53-8
Formula: C₁₅H₁₄N₂O₂
MW: 259.31 g/mol

VQ-032105

Reference Standard

Nerandomilast chemical structure

CAS: 1423719-30-5
Formula: C₂₀H₂₅ClN₆O₂S
MW: 449 g/mol

VQ-045231

Reference Standard

Neratinib Acetyl Impurity chemical structure

Neratinib Acetyl Impurity

CAS: 915941-95-6
Formula: C₂₆H₂₂ClN₅O₃
MW: 487.9 g/mol

In stock

Reference Standard

Neratinib Dimethylamine N-Oxide(M7) chemical structure

Neratinib Dimethylamine N-Oxide(M7)

CAS: 1376615-55-2
Formula: C₃₀H₂₉ClN₆O₄
MW: 573 g/mol

VQ-026872

Reference Standard

Neratinib Impurity 14 chemical structure

Neratinib Impurity 14

CAS: 1144516-15-3
Formula: C₂₈H₂₄ClN₅O₄
MW: 530 g/mol

In stock

Reference Standard

Neratinib Impurity 2 chemical structure

Neratinib Impurity 2

CAS: 848139-78-6
Formula: C₂₄H₂₀ClN₅O₂
MW: 445.9 g/mol

VQ-005349

Reference Standard

Neratinib Impurity 4 chemical structure

Neratinib Impurity 4

CAS: 1144516-19-7
Formula: C₂₈H₂₅ClN₆O₄
MW: 545 g/mol

In stock

Reference Standard

Neratinib Impurity Stage-01

Neratinib Impurity Stage-01

Formula: C₂₈H₂₄ClN₅O₅
MW: 545.97 g/mol

In stock

Reference Standard

Neratinib Impurity Stage-02

Neratinib Impurity Stage-02

CAS: 2517535-77-0
Formula: C₂₈H₂₂ClN₅O₄
MW: 527.96 g/mol

In stock

Reference Standard

Neratinib Maleate chemical structure

Neratinib Maleate

CAS: 915942-22-2
Formula: C₃₄H₃₃ClN₆O₇
MW: 673.1 g/mol

In stock

Reference Standard

Neratinib pyridine N-oxide (M3) chemical structure

Neratinib pyridine N-oxide (M3)

CAS: 1376619-94-1
Formula: C₃₀H₂₉ClN₆O₄
MW: 573 g/mol

VQ-023232

Reference Standard

Neratinib quinoline N-oxide chemical structure

Neratinib quinoline N-oxide

CAS: 1348481-03-7
Formula: C₃₀H₂₉ClN₆O₄
MW: 573 g/mol

VQ-035485

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