Pharmaceutical Impurity Standards & Reference Standards

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

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Impurity Standards

Urapidil Impurity 2

CAT No.-
CAS No.34661-79-5
Mol. F.C20H29N5O3
Mol. W.387.49
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Impurity Standards

Urapidil Impurity 3

CAT No.-
CAS No.34661-73-9
Mol. F.C19H26ClN5O2
Mol. W.391.90
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UMBELLIFERONE

Umbelliferone 7-O-Rutinoside

CAT No.-
CAS No.135064-04-9
Mol. F.C21H26O13
Mol. W.486.43
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Reference Standards

Umckalin

CAT No.-
CAS No.43053-62-9
Mol. F.C11H10O5
Mol. W.222.20
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Reference Standards

Undecylenic Acid

CAT No.-
CAS No.112-38-9
Mol. F.C11H20O2
Mol. W.184.28
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Isotope Labelled Compounds

Undecylenic Acid-d6

CAT No.-
CAS No.112-38-9 (non-d)
Mol. F.C11H20O2
Mol. W.184.28
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Reference Standards

Uracil

CAT No.-
CAS No.66-22-8
Mol. F.C4H4N2O2
Mol. W.112.09
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ULIPRISTAL

Ulipristal Acetate

CAT No.-
CAS No.126784-99-4
Mol. F.C30H37NO4
Mol. W.475.63
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Reference Standards

Ulipristal

CAT No.-
CAS No.159811-51-5
Mol. F.C28H35NO3
Mol. W.433.60
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Impurity Standards

Ulipristal Impurity 1

CAT No.-
CAS No.-
Mol. F.C30H37NO4
Mol. W.475.63
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