Pharmaceutical Impurity Standards & Reference Standards

Browse our full catalog of pharmaceutical impurities, reference materials, and research chemicals.

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Isotope Labelled Compounds

Quercetin-d3

CAT No.-
CAS No.117-39-5 (non-labelled)
Mol. F.C15H7D3O7
Mol. W.305.26
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QUERCETIN

Quercetin-3'-Sulfate

CAT No.-
CAS No.-
Mol. F.C15H10O10S
Mol. W.382.30
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Isotope Labelled Compounds

Quetiapine-d8 Hemifumarate

CAT No.-
CAS No.1435938-24-1
Mol. F.2 C21H17N3O2SD8.C4H4O4
Mol. W.2 391.56 116.07
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Impurity Standards

Quetiapine EP Impurity S HCl (QuetiapineSulfoxide HCl)

CAT No.-
CAS No.329216-63-9 (freebase)
Mol. F.C21H25N3O3S. HCl
Mol. W.399.51 36.46
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Impurity Standards

Quetiapine EP Impurity H (Quetiapine-N-Oxide)

CAT No.-
CAS No.1076199-40-0
Mol. F.C21H25N3O3S
Mol. W.399.52
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Isotope Labelled Compounds

Quinolinic Acid-15N (2,3-Pyridinedicarboxylic Acid-15N)

CAT No.-
CAS No.339155-13-4 (non-labelled)
Mol. F.C7H5NO4
Mol. W.168.12
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IDEBENONE

QS-4

CAT No.-
CAS No.58186-01-9
Mol. F.C13H16O6
Mol. W.268.27
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IDEBENONE

QS-4-d6

CAT No.-
CAS No.58186-01-9 (non-d)
Mol. F.C13H10O6D6
Mol. W.274.31
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BIOPTERIN

q-Dihydrobiopterin

CAT No.-
CAS No.-
Mol. F.C9H13N5O3
Mol. W.239.24
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