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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

Ent-Avibactam Sodium chemical structure

Ent-Avibactam Sodium

CAS: 396731-20-7
Formula: C₇H₁₀N₃NaO₆S
MW: 287.23 g/mol

VQ-035873

Reference Standard

Ent-Edoxaban chemical structure

CAS: 1255529-23-7
Formula: C₂₄H₃₀ClN₇O₄S
MW: 548.1 g/mol

VQ-025477

Reference Standard

ent-Efavirenz chemical structure

CAS: 154801-74-8
Formula: C₁₄H₉ClF₃NO₂
MW: 315.67 g/mol

VQ-022492

Reference Standard

Ent-Emtricitabine chemical structure

Ent-Emtricitabine

CAS: 137530-41-7
Formula: C₈H₁₀FN₃O₃S
MW: 247.25 g/mol

VQ-022512

Reference Standard

ent-Entecavir-di-o-benzyl Ether chemical structure

ent-Entecavir-di-o-benzyl Ether

CAS: 1354695-82-1
Formula: C₂₆H₂₇N₅O₃
MW: 457.5 g/mol

VQ-030495

Reference Standard

ent-Epinephrine Impurity 25

ent-Epinephrine Impurity 25

CAS: 2733229-72-4
Formula: C₉H₁₃NO₆S
MW: 263.27 g/mol

VQ-047341

Reference Standard

Ent-Ezetimibe Ketone chemical structure

Ent-Ezetimibe Ketone

CAS: 1376615-01-8
Formula: C₂₄H₁₉F₂NO₃
MW: 407.4 g/mol

VQ-025703

Reference Standard

Ent-Indacaterol Hydrochloride chemical structure

Ent-Indacaterol Hydrochloride

CAS: 1384188-70-8
Formula: C₂₄H₂₉ClN₂O₃
MW: 428.9 g/mol

VQ-031189

Reference Standard

ent-Letermovir chemical structure

CAS: 917389-37-8
Formula: C₂₉H₂₈F₄N₄O₄
MW: 572.5 g/mol

VQ-026410

Reference Standard

ent-Niraparib chemical structure

CAS: 1038915-58-0
Formula: C₁₉H₂₀N₄O
MW: 320.4 g/mol

VQ-026923

Reference Standard

Ent-Oseltamivir chemical structure

Ent-Oseltamivir

CAS: 1035895-88-5
Formula: C₁₆H₂₈N₂O₄
MW: 312.4 g/mol

VQ-032304

Reference Standard

Ent-Oseltamivir Phosphate chemical structure

Ent-Oseltamivir Phosphate

CAS: 1035895-89-6
Formula: C₁₆H₃₁N₂O₈P
MW: 410.4 g/mol

VQ-038810

Reference Standard

ent-Paroxetine Hydrochloride chemical structure

ent-Paroxetine Hydrochloride

CAS: 130855-30-0
Formula: C₁₉H₂₁ClFNO₃
MW: 365.8 g/mol

VQ-021305

Reference Standard

ent-Paroxol chemical structure

CAS: 389573-45-9
Formula: C₁₃H₁₈FNO
MW: 223.29 g/mol

VQ-033073

Reference Standard

ent-Rosuvastatin Lactone chemical structure

ent-Rosuvastatin Lactone

CAS: 615263-62-2
Formula: C₂₂H₂₆FN₃O₅S
MW: 463.5 g/mol

VQ-033672

Reference Standard

ent-Rosuvastatin tert-Butyl Ester chemical structure

ent-Rosuvastatin tert-Butyl Ester

CAS: 615263-60-0
Formula: C₂₆H₃₆FN₃O₆S
MW: 537.6 g/mol

VQ-027920

Reference Standard

ent-Sofosbuvir desphosphate chemical structure

ent-Sofosbuvir desphosphate

CAS: 1946820-96-7
Formula: C₁₀H₁₃FN₂O₅
MW: 260.22 g/mol

VQ-028073

Reference Standard

ent-Tedizolid Phosphate chemical structure

ent-Tedizolid Phosphate

CAS: 1835340-19-6
Formula: C₁₇H₁₆FN₆O₆P
MW: 450.3 g/mol

VQ-023844

Reference Standard

Entacapone 3-o-glucuronide chemical structure

Entacapone 3-o-glucuronide

CAS: 158069-75-1
Formula: C₂₀H₂₃N₃O₁₁
MW: 481.4 g/mol

VQ-037000

Reference Standard

Entacapone Amide Impurity chemical structure

Entacapone Amide Impurity

CAS: 158693-01-7
Formula: C₁₀H₇N₃O₅
MW: 249.18 g/mol

VQ-025542

Reference Standard

Entacapone Benzoic Acid Impurity chemical structure

Entacapone Benzoic Acid Impurity

CAS: 84211-30-3
Formula: C₇H₅NO₆
MW: 199.12 g/mol

In stock

Reference Standard

Entacapone EP Impurity A chemical structure

Entacapone EP Impurity A

CAS: 145195-63-7
Formula: C₁₄H₁₅N₃O₅
MW: 305.29 g/mol

VQ-022527

Reference Standard

Entacapone EP Impurity B chemical structure

Entacapone EP Impurity B

CAS: 1215039-66-9
Formula: C₁₂H₁₀N₂O₆
MW: 278.22 g/mol

VQ-030486

Reference Standard

Entacapone EP Impurity C chemical structure

Entacapone EP Impurity C

CAS: 116313-85-0
Formula: C₇H₅NO₅
MW: 183.12 g/mol

VQ-022530

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