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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

Nelfinavir Mesylate chemical structure

Nelfinavir Mesylate

CAS: 159989-65-8
Formula: C₃₃H₄₉N₃O₇S₂
MW: 663.9 g/mol

VQ-051251

Reference Standard

Nemadectin chemical structure

CAS: 102130-84-7
Formula: C₃₆H₅₂O₈
MW: 612.8 g/mol

VQ-038507

Reference Standard

Nemonoxacin chemical structure

CAS: 378746-64-6
Formula: C₂₀H₂₅N₃O₄
MW: 371.4 g/mol

VQ-049210

Reference Standard

Neohesperidin Dihydrochalcone EP Impurity A chemical structure

Neohesperidin Dihydrochalcone EP Impurity A

CAS: 23643-71-2
Formula: C₂₀H₂₈O₁₃
MW: 476.4 g/mol

VQ-026858

Reference Standard

Neohesperidin Dihydrochalcone EP Impurity B chemical structure

Neohesperidin Dihydrochalcone EP Impurity B

CAS: 38665-01-9
Formula: C₂₈H₃₂O₁₅
MW: 608.5 g/mol

VQ-026857

Reference Standard

Neohesperidin Dihydrochalcone EP Impurity D chemical structure

Neohesperidin Dihydrochalcone EP Impurity D

CAS: 18916-17-1
Formula: C₂₇H₃₄O₁₄
MW: 582.5 g/mol

VQ-032096

Reference Standard

Neohesperidin Dihydrochalcone EP Impurity E chemical structure

Neohesperidin Dihydrochalcone EP Impurity E

CAS: 35573-79-6
Formula: C₂₈H₃₆O₁₅
MW: 612.6 g/mol

VQ-026860

Reference Standard

Neohesperidin Dihydrochalcone EP Impurity F chemical structure

Neohesperidin Dihydrochalcone EP Impurity F

CAS: 21940-36-3
Formula: C₂₂H₂₆O₁₁
MW: 466.4 g/mol

VQ-026859

Reference Standard

Neohesperidin Dihydrochalcone EP Impurity G chemical structure

Neohesperidin Dihydrochalcone EP Impurity G

CAS: 35400-60-3
Formula: C₁₆H₁₆O₆
MW: 304.29 g/mol

VQ-026861

Reference Standard

Neomycin B-LP chemical structure

CAS: 54617-40-2
Formula: C₂₅H₄₈N₆O₁₄
MW: 656.7 g/mol

VQ-044540

Reference Standard

Neomycin C chemical structure

CAS: 66-86-4
Formula: C₂₃H₄₆N₆O₁₃
MW: 614.6 g/mol

VQ-032098

Reference Standard

Neomycin EP Impurity G chemical structure

Neomycin EP Impurity G

CAS: 54631-94-6
Formula: C₂₅H₄₈N₆O₁₄
MW: 656.7 g/mol

VQ-032099

Reference Standard

Neomycin Impurity 1

Neomycin Impurity 1

CAS: 250250-20-5
Formula: C₂₅H₄₇N₅O₁₅
MW: 657.7 g/mol

VQ-049211

Reference Standard

Neomycin Sulfate EP Impurity A chemical structure

Neomycin Sulfate EP Impurity A

CAS: 3947-65-7
Formula: C₁₂H₂₆N₄O₆
MW: 322.36 g/mol

VQ-023224

Reference Standard

Neomycin sulfate EP Impurity B chemical structure

Neomycin sulfate EP Impurity B

CAS: 54617-39-9
Formula: C₁₄H₂₈N₄O₇
MW: 364.39 g/mol

VQ-026863

Reference Standard

Neopentyl Ketal Impurity chemical structure

Neopentyl Ketal Impurity

CAS: 88128-57-8
Formula: C₁₀H₁₉ClO₂
MW: 206.71 g/mol

In stock

Reference Standard

Neoponcirin chemical structure

CAS: 14259-47-3
Formula: C₂₈H₃₄O₁₄
MW: 594.6 g/mol

VQ-030191

Reference Standard

Neoponcirin(Mixture of diastereomers) chemical structure

Neoponcirin(Mixture of diastereomers)

CAS: 2418540-64-2
Formula: C₂₈H₃₄O₁₄
MW: 594.6 g/mol

VQ-036728

Reference Standard

Neosamine B chemical structure

CAS: 527-10-6
Formula: C₆H₁₄N₂O₄
MW: 178.19 g/mol

VQ-045247

Reference Standard

Neostigmine chemical structure

CAS: 59-99-4
Formula: C₁₂H₁₉N₂O₂⁺
MW: 223.29 g/mol

VQ-044027

Reference Standard

Neostigmine Bromide chemical structure

Neostigmine Bromide

CAS: 114-80-7
Formula: C₁₂H₁₉BrN₂O₂
MW: 303.2 g/mol

VQ-026867

Reference Standard

Neostigmine EP Impurity A chemical structure

Neostigmine EP Impurity A

CAS: 3483-84-9
Formula: C₉H₁₄NO⁺
MW: 152.21 g/mol

VQ-049212

Reference Standard

Neostigmine EP Impurity A (Iodide Salt) chemical structure

Neostigmine EP Impurity A (Iodide Salt)

CAS: 2498-27-3
Formula: C₉H₁₄INO
MW: 279.12 g/mol

VQ-032101

Reference Standard

Neostigmine EP Impurity C chemical structure

Neostigmine EP Impurity C

CAS: 16088-19-0
Formula: C₁₁H₁₆N₂O₂
MW: 208.26 g/mol

VQ-026868

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