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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

Acephylline chemical structure

CAS: 652-37-9
Formula: C₉H₁₀N₄O₄
MW: 238.2 g/mol

VQ-021398

Reference Standard

Acephylline Piperazinate chemical structure

Acephylline Piperazinate

CAS: 18833-13-1
Formula: C₁₃H₂₀N₆O₄
MW: 324.34 g/mol

VQ-035582

Reference Standard

Acepromazine chemical structure

CAS: 61-00-7
Formula: C₁₉H₂₂N₂OS
MW: 326.5 g/mol

VQ-029003

Reference Standard

Acepromazine Maleate chemical structure

Acepromazine Maleate

CAS: 3598-37-6
Formula: C₂₃H₂₆N₂O₅S
MW: 442.5 g/mol

VQ-024129

Reference Standard

Acepromazine-d6 Maleate chemical structure

Acepromazine-d6 Maleate

CAS: 1331655-50-5
Formula: C₂₃H₂₆N₂O₅S
MW: 448.6 g/mol

VQ-035583

Reference Standard

Aceprometazine Maleate chemical structure

Aceprometazine Maleate

CAS: 7455-18-7
Formula: C₂₃H₂₆N₂O₅S
MW: 442.5 g/mol

VQ-041727

Reference Standard

Acesulfame chemical structure

CAS: 33665-90-6
Formula: C₄H₅NO₄S
MW: 163.15 g/mol

VQ-035584

Reference Standard

Acesulfame D4

CAS: 1623192-76-6
Formula: C₄D₄NO₄S
MW: 166.2 g/mol

VQ-045380

Reference Standard

Acesulfame Potassium EP Impurity B chemical structure

Acesulfame Potassium EP Impurity B

CAS: 72827-08-8
Formula: C₄H₄ClNO₄S
MW: 197.6 g/mol

VQ-021415

Reference Standard

Acetamide-d5 chemical structure

CAS: 33675-83-1
Formula: C₂H₅NO
MW: 64.1 g/mol

VQ-035585

Reference Standard

Acetaminophen D4 chemical structure

Acetaminophen D4

CAS: 64315-36-2
Formula: C₈H₉NO₂
MW: 155.19 g/mol

VQ-033062

Reference Standard

Acetaminophen Dimer chemical structure

Acetaminophen Dimer

CAS: 98966-14-4
Formula: C₁₆H₁₆N₂O₄
MW: 300.31 g/mol

VQ-023464

Reference Standard

Acetaminophen Glucuronide chemical structure

Acetaminophen Glucuronide

CAS: 16110-10-4
Formula: C₁₄H₁₇NO₈
MW: 327.29 g/mol

VQ-041335

Reference Standard

Acetaminophen Impurity A

Acetaminophen Impurity A

CAS: 2518359-40-3
Formula: C₁₆H₁₆N₂O₃
MW: 284.3 g/mol

VQ-043249

Reference Standard

Acetaminophen-d3 chemical structure

Acetaminophen-d3

CAS: 60902-28-5
Formula: C₈H₉NO₂
MW: 154.18 g/mol

VQ-033053

Reference Standard

Acetamiprid chemical structure

CAS: 135410-20-7
Formula: C₁₀H₁₁ClN₄
MW: 222.67 g/mol

VQ-035586

Reference Standard

Acetamiprid chemical structure

CAS: 160430-64-8
Formula: C₁₀H₁₁ClN₄
MW: 222.67 g/mol

VQ-038903

Reference Standard

Acetamiprid metabolite IM-1-2 chemical structure

Acetamiprid metabolite IM-1-2

CAS: 215366-29-3
Formula: C₁₀H₁₃ClN₄O
MW: 240.69 g/mol

VQ-047308

Reference Standard

Acetamiprid-N-desmethyl chemical structure

Acetamiprid-N-desmethyl

CAS: 190604-92-3
Formula: C₉H₉ClN₄
MW: 208.65 g/mol

VQ-038904

Reference Standard

Acetazolamide chemical structure

CAS: 59-66-5
Formula: C₄H₆N₄O₃S₂
MW: 222.3 g/mol

VQ-020720

Reference Standard

Acetazolamide EP Impurity A chemical structure

Acetazolamide EP Impurity A

CAS: 60320-32-3
Formula: C₄H₄ClN₃OS
MW: 177.61 g/mol

VQ-021416

Reference Standard

Acetazolamide EP Impurity B chemical structure

Acetazolamide EP Impurity B

CAS: 5393-55-5
Formula: C₄H₅N₃OS
MW: 143.17 g/mol

VQ-020721

Reference Standard

Acetazolamide EP Impurity C chemical structure

Acetazolamide EP Impurity C

CAS: 32873-56-6
Formula: C₄H₅N₃OS₂
MW: 175.2 g/mol

VQ-020722

Reference Standard

Acetazolamide EP Impurity D chemical structure

Acetazolamide EP Impurity D

CAS: 14949-00-9
Formula: C₂H₄N₄O₂S₂
MW: 180.21 g/mol

VQ-021417

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