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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

Cyclic 3-Hydroxymelatonin chemical structure

Cyclic 3-Hydroxymelatonin

CAS: 67199-08-0
Formula: C₁₃H₁₆N₂O₃
MW: 248.28 g/mol

VQ-023051

Reference Standard

Cyclic Oligomer 9 chemical structure

Cyclic Oligomer 9

CAS: 1394013-66-1
Formula: C₂₂H₂₈O₁₀
MW: 452.5 g/mol

VQ-040906

Reference Standard

Cyclic urea of Carbamazepine

Cyclic urea of Carbamazepine

CAS: 168922-00-7
Formula: C₁₅H₁₄N₂O
MW: 238.29 g/mol

VQ-036140

Reference Standard

Cyclizine chemical structure

CAS: 82-92-8
Formula: C₁₈H₂₂N₂
MW: 266.4 g/mol

VQ-032554

Reference Standard

Cyclizine D4 Hydrochloride chemical structure

Cyclizine D4 Hydrochloride

CAS: 1246814-82-3
Formula: C₁₈H₂₃ClN₂
MW: 306.9 g/mol

VQ-047881

Reference Standard

Cyclizine Hydrochloride chemical structure

Cyclizine Hydrochloride

CAS: 303-25-3
Formula: C₁₈H₂₃ClN₂
MW: 302.8 g/mol

VQ-034818

Reference Standard

Cyclizine-d3 chemical structure

CAS: 1170155-67-5
Formula: C₁₈H₂₂N₂
MW: 269.4 g/mol

VQ-036464

Reference Standard

Cyclo L-Arginine chemical structure

Cyclo L-Arginine

CAS: 28958-90-9
Formula: C₆H₁₁N₃O₂
MW: 157.17 g/mol

VQ-037892

Reference Standard

Cyclo RacArginine chemical structure

Cyclo RacArginine

CAS: 89531-99-7
Formula: C₆H₁₁N₃O₂
MW: 157.17 g/mol

VQ-037893

Reference Standard

Cyclo-(Pro-Gly) chemical structure

Cyclo-(Pro-Gly)

CAS: 19179-12-5
Formula: C₇H₁₀N₂O₂
MW: 154.17 g/mol

VQ-039651

Reference Standard

Cyclo-Gly-Pro chemical structure

CAS: 3705-27-9
Formula: C₇H₁₀N₂O₂
MW: 154.17 g/mol

VQ-039089

Reference Standard

Cyclo(-Ala-Gln) chemical structure

Cyclo(-Ala-Gln)

CAS: 268221-76-7
Formula: C₈H₁₃N₃O₃
MW: 199.21 g/mol

VQ-023384

Reference Standard

Cyclo(-Ala-Glu) chemical structure

Cyclo(-Ala-Glu)

CAS: 16364-36-6
Formula: C₈H₁₂N₂O₄
MW: 200.19 g/mol

VQ-021952

Reference Standard

Cyclo(L-Pro-L-Trp) chemical structure

Cyclo(L-Pro-L-Trp)

CAS: 38136-70-8
Formula: C₁₆H₁₇N₃O₂
MW: 283.32 g/mol

VQ-037039

Reference Standard

Cyclobenzaprine chemical structure

Cyclobenzaprine

CAS: 303-53-7
Formula: C₂₀H₂₁N
MW: 275.4 g/mol

VQ-028809

Reference Standard

Cyclobenzaprine 10,11 epoxide chemical structure

Cyclobenzaprine 10,11 epoxide

CAS: 58256-08-9
Formula: C₂₀H₂₁NO
MW: 291.4 g/mol

VQ-022272

Reference Standard

Cyclobenzaprine Didesmethyl hydrochloride chemical structure

Cyclobenzaprine Didesmethyl hydrochloride

CAS: 1614-47-7
Formula: C₁₈H₁₇N
MW: 247.3 g/mol

VQ-043946

Reference Standard

Cyclobenzaprine N-Glucuronide chemical structure

Cyclobenzaprine N-Glucuronide

CAS: 67324-97-4
Formula: C₂₆H₂₉NO₆
MW: 451.5 g/mol

VQ-036466

Reference Standard

Cyclobenzaprine N-Oxide chemical structure

Cyclobenzaprine N-Oxide

CAS: 6682-26-4
Formula: C₂₀H₂₁NO
MW: 291.4 g/mol

VQ-022270

Reference Standard

Cyclobenzaprine USP Related Compound A chemical structure

Cyclobenzaprine USP Related Compound A

CAS: 18029-54-4
Formula: C₂₀H₂₃NO
MW: 293.4 g/mol

VQ-022271

Reference Standard

Cyclobenzaprine-d3 Hydrochloride chemical structure

Cyclobenzaprine-d3 Hydrochloride

CAS: 1184983-42-3
Formula: C₂₀H₂₂ClN
MW: 314.9 g/mol

VQ-029952

Reference Standard

Cyclobenzaprine-d6 chemical structure

Cyclobenzaprine-d6

CAS: 1261396-60-4
Formula: C₂₀H₂₁N
MW: 281.4 g/mol

VQ-043618

Reference Standard

Cyclobutane-1,1-dicarboxamide chemical structure

Cyclobutane-1,1-dicarboxamide

CAS: 33582-68-2
Formula: C₆H₁₀N₂O₂
MW: 142.16 g/mol

VQ-047413

Reference Standard

Cyclobutanecarboxylic acid chemical structure

Cyclobutanecarboxylic acid

CAS: 3721-95-7
Formula: C₅H₈O₂
MW: 100.12 g/mol

VQ-027236

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