Pharmaceutical Impurity Standards & Reference Standards

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

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SILDENAFIL

Propoxyphenyl Hydroxyhomo Sildenafil

CAT No.-
CAS No.139755-87-6
Mol. F.C24H34N6O5S
Mol. W.518.63
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SILDENAFIL

Propoxyphenyl Thiosildenafil

CAT No.-
CAS No.479073-87-5
Mol. F.C23H32N6O3S2
Mol. W.504.67
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SILDENAFIL

Pyrazole N-Desmethyl Sildenafil

CAT No.-
CAS No.139755-95-6
Mol. F.C21H28N6O4S
Mol. W.460.55
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SILDENAFIL

Piperiacetildenafil

CAT No.-
CAS No.147676-50-4
Mol. F.C24H31N5O3
Mol. W.437.54
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ROPINIROLE

Propylidine Ropinirole HCl (E/Z-Mixture)

CAT No.-
CAS No.249622-62-6 (Z and E)
Mol. F.C19H28N2O HCl
Mol. W.300.45 36.46
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Impurity Standards

Paliperidone (9-Hydroxy Risperidone, RisperidoneEP Impurity C)

CAT No.-
CAS No.144598-75-4
Mol. F.C23H27FN4O3
Mol. W.426.49
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Impurity Standards

Paliperidone-d4 (9-Hydroxy Risperidone-d4,Risperidone EP Impurity C-d4)

CAT No.-
CAS No.1020719-55-4
Mol. F.C23H23FN4O3D4
Mol. W.430.52
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RISPERIDONE

Paliperidone N-Oxide

CAT No.-
CAS No.761460-08-6
Mol. F.C23H27FN4O4
Mol. W.442.49
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Impurity Standards

Pyrvinium Pamoate Impurity 2

CAT No.-
CAS No.-
Mol. F.C25H25N3
Mol. W.367.50
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PYRROLE

Pyrrole Related Compound 3

CAT No.-
CAS No.-
Mol. F.C11H8FNO2
Mol. W.205.19
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