Pharmaceutical Impurity Standards & Reference Standards

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

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VALERIC ACID

Calcium 4-Methyl-2-Oxovalerate

CAT No.-
CAS No.352538-33-1
Mol. F.2 C6H9O3. Ca
Mol. W.2 129.14 40.08
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VALERIC ACID

Calcium 3-Methyl-2-Oxovalerate

CAT No.-
CAS No.66872-75-1
Mol. F.2 C6H9O3. Ca
Mol. W.2 129.14 40.08
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TYROSINE

Cyclo(D-tyrosylglycine)

CAT No.-
CAS No.1217777-38-2
Mol. F.C11H12N2O3
Mol. W.220.23
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TRANILAST

cis-Tranilast

CAT No.-
CAS No.-
Mol. F.C18H17NO5
Mol. W.327.34
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TOLTERODINE

Carboxy Tolterodine Glucuronide

CAT No.-
CAS No.-
Mol. F.C28H37NO9
Mol. W.531.61
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TETRABENAZINE

cis-Dihydro Tetrabenazine

CAT No.-
CAS No.113627-25-1
Mol. F.C19H29NO3
Mol. W.319.45
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Isotope Labelled Compounds

cis-Dihydro Tetrabenazine-d7

CAT No.-
CAS No.1217719-21-5
Mol. F.C19H22D7NO3
Mol. W.326.49
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TADALAFIL

Chloropropanoylpretadalafil

CAT No.-
CAS No.-
Mol. F.C23H21ClN2O5
Mol. W.440.89
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Isotope Labelled Compounds

Chloropretadalafil-13C2-d2

CAT No.-
CAS No.-
Mol. F.C22H17ClN2O5D2
Mol. W.430.85
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Isotope Labelled Compounds

Cyclopentyl Tadalafil-d4

CAT No.-
CAS No.-
Mol. F.C26H16N3O4D9
Mol. W.452.56
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