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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.

27,990products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,098 Pharmacopeial Impurities (EP / USP / BP) 4,399 Nitrosamine Impurities 631 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,504 Metabolites & Degradation Products 3,922 API Reference Standards 3,436

Reference Standard

Relugolix Impurity 34 chemical structure

Relugolix Impurity 34

CAS: 1589503-95-6
Formula: C₂₄H₂₃F₂N₃O₆S
MW: 519.5 g/mol

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Reference Standard

Relugolix Impurity 5 chemical structure

Relugolix Impurity 5

CAS: 1589504-01-7
Formula: C₃₁H₃₀F₂N₈O₇S
MW: 696.7 g/mol

VQ-033487

Reference Standard

Relugolix Impurity 61 chemical structure

Relugolix Impurity 61

CAS: 2814571-32-7
Formula: C₂₆H₂₄F₂N₆O₄S
MW: 554.6 g/mol

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Reference Standard

Relugolix Impurity A

Relugolix Impurity A

CAS: 2924011-35-6
Formula: C₃₀H₂₉F₂N₇O₄S
MW: 621.66 g/mol

VQ-005736

Reference Standard

Relugolix Impurity B chemical structure

Relugolix Impurity B

CAS: 1589503-93-4
Formula: C₂₇H₂₄F₂N₆O₃S
MW: 550.6 g/mol

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Reference Standard

Relugolix Impurity-1

Relugolix Impurity-1

Formula: C₂₇H₂₅FN₆O₃S
MW: 532.59 g/mol

VQ-005738

Reference Standard

Relugolix Impurity-2

Relugolix Impurity-2

Formula: C₂₇H₂₆N₆O₃S
MW: 514.6 g/mol

VQ-005739

Reference Standard

Relugolix Impurity-20 (Stage-V) chemical structure

Relugolix Impurity-20 (Stage-V)

CAS: 2767571-66-2
Formula: C₂₆H₂₆F₂N₆O₂S
MW: 524.6 g/mol

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Reference Standard

Relugolix Impurity-3

Relugolix Impurity-3

Formula: C₂₃H₂₃F₂N₃O₄S
MW: 475.51 g/mol

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Reference Standard

Relugolix Impurity-48

Relugolix Impurity-48

Formula: C₅₆H₄₇F₄N₁₃O₈S₂
MW: 1170.18 g/mol

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Reference Standard

Relugolix NH-OH Impurity (Formate Salt)

Relugolix NH-OH Impurity (Formate Salt)

Formula: C₂₇H₂₄F₂N₆O₄S.CH₂O₂
MW: 612.61 g/mol

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Reference Standard

Relugolix NH-OH Impurity (N-1Stage) chemical structure

Relugolix NH-OH Impurity (N-1Stage)

CAS: 1589503-96-7
Formula: C₂₇H₂₂F₂N₆O₅S
MW: 580.6 g/mol

VQ-005744

Reference Standard

Relugolix NH-OH Impurity (Stage-1) chemical structure

Relugolix NH-OH Impurity (Stage-1)

CAS: 1589503-94-5
Formula: C₆₇H₆₅BrN₇O₁₄PS₄
MW: 1431.4 g/mol

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Reference Standard

Relugolix Nitroso Trifluoroacetate Impurity-2

Relugolix Nitroso Trifluoroacetate Impurity-2

Formula: C₂₇H₂₂F₂N₆O₄S.C₂HF₃O₂
MW: 678.59 g/mol

In stock

Reference Standard

Relugolix Urea Dimer Impurity chemical structure

Relugolix Urea Dimer Impurity

CAS: 2814571-36-1
Formula: C₅₅H₄₆F₄N₁₂O₇S₂
MW: 1127.2 g/mol

VQ-027768

Reference Standard

Remdesivir Diastereomer Impurity chemical structure

Remdesivir Diastereomer Impurity

CAS: 1911578-75-0
Formula: C₂₇H₃₅N₆O₈P
MW: 602.6 g/mol

VQ-005746

Reference Standard

Remdesivir Impurity 20 chemical structure

Remdesivir Impurity 20

CAS: 1884576-18-4
Formula: C₃₀H₃₉N₆O₈P
MW: 642.6 g/mol

In stock

Reference Standard

Remdesivir O-Desphosphate Acetonide Impurity chemical structure

Remdesivir O-Desphosphate Acetonide Impurity

CAS: 1191237-80-5
Formula: C₁₅H₁₇N₅O₄
MW: 331.33 g/mol

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Reference Standard

Remdesivir O-Desphosphate Analogue chemical structure

Remdesivir O-Desphosphate Analogue

CAS: 1191237-69-0
Formula: C₁₂H₁₃N₅O₄
MW: 291.26 g/mol

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Reference Standard

Remdesivir O-Desphosphate Tri-OBn Impurity chemical structure

Remdesivir O-Desphosphate Tri-OBn Impurity

CAS: 1355049-94-3
Formula: C₃₂H₃₂N₄O₅
MW: 552.6 g/mol

VQ-035353

Reference Standard

Remdesivir p-NitroPhenoxy L-Alanine Impurity chemical structure

Remdesivir p-NitroPhenoxy L-Alanine Impurity

CAS: 1354823-36-1
Formula: C₂₁H₂₇N₂O₇P
MW: 450.4 g/mol

In stock

Reference Standard

Remdesivir Phosphate Impurity chemical structure

Remdesivir Phosphate Impurity

CAS: 1911578-74-9
Formula: C₁₂H₁₄N₅O₇P
MW: 371.24 g/mol

VQ-033493

Reference Standard

Remdesivir WS chemical structure

CAS: 1809249-37-3
Formula: C₂₇H₃₅N₆O₈P
MW: 602.6 g/mol

VQ-007704

Reference Standard

Remibrutinib chemical structure

CAS: 1787294-07-8
Formula: C₂₇H₂₇F₂N₅O₃
MW: 507.5 g/mol

In stock

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