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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

Zolmitriptan WS chemical structure

Zolmitriptan WS

CAS: 139264-17-8
Formula: C₁₆H₂₁N₃O₂
MW: 287.36 g/mol

In stock

Reference Standard

Zolmitriptan-d6 chemical structure

Zolmitriptan-d6

CAS: 1217644-84-2
Formula: C₁₆H₂₁N₃O₂
MW: 293.39 g/mol

VQ-043015

Reference Standard

Zolpidem Carbaldehyde chemical structure

Zolpidem Carbaldehyde

CAS: 400777-11-9
Formula: C₁₆H₁₄N₂O
MW: 250.29 g/mol

VQ-034760

Reference Standard

Zolpidem EP Impurity D chemical structure

Zolpidem EP Impurity D

CAS: 836627-56-6
Formula: C₁₃H₁₆BrNO₂
MW: 298.18 g/mol

VQ-034765

Reference Standard

Zolpidem EP Impurity E chemical structure

Zolpidem EP Impurity E

CAS: 83192-85-2
Formula: C₁₃H₁₅NO₂
MW: 217.26 g/mol

VQ-044866

Reference Standard

Zolpidem EP Impurity F chemical structure

Zolpidem EP Impurity F

CAS: 402470-91-1
Formula: C₁₃H₁₇NO₂
MW: 219.28 g/mol

VQ-034764

Reference Standard

Zolpidem Impurity 5 chemical structure

Zolpidem Impurity 5

CAS: 14547-80-9
Formula: C₁₃H₁₂N₂O
MW: 212.25 g/mol

VQ-043016

Reference Standard

Zolpidem IV chemical structure

CAS: 768398-03-4
Formula: C₁₇H₁₅N₃
MW: 261.32 g/mol

VQ-044865

Reference Standard

Zolpidem Related Compound C chemical structure

Zolpidem Related Compound C

CAS: 349122-64-1
Formula: C₁₄H₁₄N₂O
MW: 226.27 g/mol

VQ-044867

Reference Standard

Zolpidem Tartrate - Impurity A chemical structure

Zolpidem Tartrate - Impurity A

CAS: 1346600-85-8
Formula: C₁₉H₂₁N₃O
MW: 307.4 g/mol

VQ-034759

Reference Standard

Zolpidem-d6 chemical structure

CAS: 959605-90-4
Formula: C₁₉H₂₁N₃O
MW: 313.4 g/mol

VQ-043017

Reference Standard

Zolpidic acid chemical structure

CAS: 189005-44-5
Formula: C₁₇H₁₆N₂O₂
MW: 280.32 g/mol

VQ-034761

Reference Standard

Zonisamide chemical structure

CAS: 68291-97-4
Formula: C₈H₈N₂O₃S
MW: 212.23 g/mol

VQ-028794

Reference Standard

Zonisamide N,N-Dimethylformimidamide chemical structure

Zonisamide N,N-Dimethylformimidamide

CAS: 1217201-89-2
Formula: C₁₁H₁₃N₃O₃S
MW: 267.31 g/mol

VQ-024060

Reference Standard

Zonisamide USP Related Compound A chemical structure

Zonisamide USP Related Compound A

CAS: 73101-64-1
Formula: C₈H₆NNaO₄S
MW: 235.19 g/mol

VQ-024059

Reference Standard

Zonisamide-d4 chemical structure

CAS: 1020720-04-0
Formula: C₈H₈N₂O₃S
MW: 216.25 g/mol

VQ-043018

Reference Standard

Zopiclone chemical structure

CAS: 43200-80-2
Formula: C₁₇H₁₇ClN₆O₃
MW: 388.8 g/mol

In stock

Reference Standard

Zopiclone Dihydrate

Zopiclone Dihydrate

CAS: 276248-77-2
Formula: C₁₇H₁₇ClN₆O_3.2H₂O
MW: 424.84 g/mol

VQ-007864

Reference Standard

Zopiclone EP Impurity A chemical structure

Zopiclone EP Impurity A

CAS: 43200-96-0
Formula: C₁₇H₁₇ClN₆O₄
MW: 404.8 g/mol

In stock

Reference Standard

Zopiclone EP Impurity B chemical structure

Zopiclone EP Impurity B

CAS: 43200-81-3
Formula: C₁₁H₇ClN₄O₂
MW: 262.65 g/mol

In stock

Reference Standard

Zopiclone EP impurity C chemical structure

Zopiclone EP impurity C

CAS: 148891-53-6
Formula: C₁₁H₇ClN₄O
MW: 246.65 g/mol

In stock

Reference Standard

Zopiclone Impurity 2 chemical structure

Zopiclone Impurity 2

CAS: 43200-82-4
Formula: C₁₁H₅ClN₄O₂
MW: 260.63 g/mol

In stock

Reference Standard

Zosuquidar Trihydrochloride chemical structure

Zosuquidar Trihydrochloride

CAS: 167465-36-3
Formula: C₃₂H₃₄Cl₃F₂N₃O₂
MW: 637 g/mol

VQ-051462

Reference Standard

Zotepine chemical structure

CAS: 26615-21-4
Formula: C₁₈H₁₈ClNOS
MW: 331.9 g/mol

VQ-034767

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