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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

Etoricoxib N-Oxide chemical structure

Etoricoxib N-Oxide

CAS: 325855-71-8
Formula: C₁₈H₁₅ClN₂O₃S
MW: 374.8 g/mol

VQ-025680

Reference Standard

Etoricoxib Related Compound A chemical structure

Etoricoxib Related Compound A

CAS: 10297-73-1
Formula: C₉H₁₀O₃S
MW: 198.24 g/mol

In stock

Reference Standard

Etoricoxib Related Compound B chemical structure

Etoricoxib Related Compound B

CAS: 90536-66-6
Formula: C₉H₁₀O₄S
MW: 214.24 g/mol

In stock

Reference Standard

Etoricoxib-d3 chemical structure

CAS: 850896-71-8
Formula: C₁₈H₁₅ClN₂O₂S
MW: 361.9 g/mol

VQ-037156

Reference Standard

Etoricoxib-d4 chemical structure

CAS: 1131345-14-6
Formula: C₁₈H₁₅ClN₂O₂S
MW: 362.9 g/mol

VQ-037155

Reference Standard

Etrasimod chemical structure

CAS: 1206123-37-6
Formula: C₂₆H₂₆F₃NO₃
MW: 457.5 g/mol

VQ-007473

Reference Standard

Etravirine chemical structure

CAS: 269055-15-4
Formula: C₂₀H₁₅BrN₆O
MW: 435.3 g/mol

VQ-030632

Reference Standard

Etravirine 5-Desbromo 6-Chloro Impurity chemical structure

Etravirine 5-Desbromo 6-Chloro Impurity

CAS: 1070377-34-2
Formula: C₂₀H₁₄ClN₅O
MW: 375.8 g/mol

In stock

Reference Standard

Etravirine Desbromo Methyl Ester Impurity

Etravirine Desbromo Methyl Ester Impurity

CAS: 2240161-95-7
Formula: C₂₆H₂₆N₆O₃
MW: 470.52 g/mol

In stock

Reference Standard

Etravirine Impurity 12 chemical structure

Etravirine Impurity 12

CAS: 1706943-59-0
Formula: C₂₀H₁₇BrN₆O₂
MW: 453.3 g/mol

VQ-004942

Reference Standard

Etravirine Impurity 16 chemical structure

Etravirine Impurity 16

CAS: 2240161-92-4
Formula: C₂₅H₂₄BrN₇O₂
MW: 534.4 g/mol

In stock

Reference Standard

Etravirine Impurity 3 chemical structure

Etravirine Impurity 3

CAS: 1398507-09-9
Formula: C₁₁H₇BrClN₅
MW: 324.56 g/mol

In stock

Reference Standard

Etravirine Impurity 5 chemical structure

Etravirine Impurity 5

CAS: 269055-04-1
Formula: C₂₀H₁₄BrN₅O
MW: 420.3 g/mol

VQ-030633

Reference Standard

Etravirine Impurity 6 chemical structure

Etravirine Impurity 6

CAS: 1704730-70-0
Formula: C₂₉H₂₁BrN₆O₂
MW: 565.4 g/mol

In stock

Reference Standard

Etravirine N-Oxide chemical structure

Etravirine N-Oxide

CAS: 907180-19-2
Formula: C₂₀H₁₅BrN₆O₂
MW: 451.3 g/mol

VQ-037159

Reference Standard

Etravirine-13C3 chemical structure

Etravirine-13C3

CAS: 1189671-48-4
Formula: C₂₀H₁₅BrN₆O
MW: 438.3 g/mol

VQ-048319

Reference Standard

Etravirine-d4 chemical structure

CAS: 1142095-93-9
Formula: C₂₀H₁₅BrN₆O
MW: 439.3 g/mol

VQ-037163

Reference Standard

Etravirine-d8 chemical structure

CAS: 1142096-06-7
Formula: C₂₀H₁₅BrN₆O
MW: 443.3 g/mol

VQ-037162

Reference Standard

Eugenol EP Impurity A (Free Base) chemical structure

Eugenol EP Impurity A (Free Base)

CAS: 87-44-5
Formula: C₁₅H₂₄
MW: 204.35 g/mol

VQ-023400

Reference Standard

Eugenol EP Impurity G (Free Base) chemical structure

Eugenol EP Impurity G (Free Base)

CAS: 5932-68-3
Formula: C₁₀H₁₂O₂
MW: 164.2 g/mol

VQ-049632

Reference Standard

Eupatilin chemical structure

CAS: 22368-21-4
Formula: C₁₈H₁₆O₇
MW: 344.3 g/mol

VQ-030634

Reference Standard

Europine chemical structure

CAS: 570-19-4
Formula: C₁₆H₂₇NO₆
MW: 329.39 g/mol

VQ-037166

Reference Standard

Europine-N-Oxide chemical structure

Europine-N-Oxide

CAS: 65582-53-8
Formula: C₁₆H₂₇NO₇
MW: 345.39 g/mol

VQ-030635

Reference Standard

Eurycomanone chemical structure

CAS: 84633-29-4
Formula: C₂₀H₂₄O₉
MW: 408.4 g/mol

VQ-039592

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