Pharmaceutical Impurity Standards & Reference Standards

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

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Impurity Standards

rac-Valsartan EP Impurity B

CAT No.-
CAS No.1894176-44-3
Mol. F.C31H35N5O3
Mol. W.525.66
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Impurity Standards

rac-Tryptophan EP Impurity G HCl

CAT No.-
CAS No.1313016-72-6 (freebase)
Mol. F.C11H12N2O3. HCl
Mol. W.220.23 36.46
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Isotope Labelled Compounds

Retinoic Acid-d5 (Tretinoin-d5)

CAT No.-
CAS No.302-79-4 (non-labelled)
Mol. F.C20H23O2D5
Mol. W.305.47
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TRANYLCYPROMINE

rac-trans-Tranylcypromine HCl

CAT No.-
CAS No.1986-47-6
Mol. F.C9H11N. HCl
Mol. W.133.19 36.46
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TOLVAPTAN

rac-trans-4-Hydroxy Tolvaptan

CAT No.-
CAS No.926035-34-9
Mol. F.C26H25ClN2O4
Mol. W.464.95
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Isotope Labelled Compounds

rac-5-Hydroxymethyl Tolterodine-d5

CAT No.-
CAS No.-
Mol. F.C22H26NO2D5
Mol. W.346.53
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Isotope Labelled Compounds

rac-Tolterodine-d14 Tartrate

CAT No.-
CAS No.1246911-91-0 (freebase)
Mol. F.C22H17D14NO. C4H6O6
Mol. W.339.58 150.09
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Isotope Labelled Compounds

Racemic 5-Hydroxymethyl Tolterodine-d14

CAT No.-
CAS No.1185071-13-9
Mol. F.C22H17NO2D14
Mol. W.355.58
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TOFACITINIB

rac-Tofacitinib (Mixture of Diastereomers)

CAT No.-
CAS No.344418-92-4
Mol. F.C16H20N6O
Mol. W.312.38
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TIMOLOL

Racemic Timolol Maleate

CAT No.-
CAS No.57073-55-9
Mol. F.C13H24N4O3S
Mol. W.316.43
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