DA 3505

We are open as normal during COVID-19 pandemic. Order online, same day shipping out.

    WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 581132

CAS#: 77165-71-0

Description: DA 3505 is one of feprazone metabolite. Limits of detection are 0.1 microgram feprazone per ml plasma and 0.2 microgram of its metabolite per ml plasma using the HPLC method. Concentration down to about 0.5 microgram/ml plasma of both compounds can be determined using the TLC method.

Price and Availability

Size Price Shipping out time Quantity
Inquire bulk and customized quantity

Pricing updated 2020-05-28. Prices are subject to change without notice.

DA 3505 is not in stock, may be available through custom synthesis. For cost-effective reason, minimum 1 gram order is requested. The product will be characterized by NMR, HPLC and MS analysis. Purity (HPLC) is usually >98%. CoA, QC data, MSDS will be provided when product is successfully made. The estimated lead time is 2-3 months. Please send email to sales@medkoo.com to inquire quote.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 581132
Name: DA 3505
CAS#: 77165-71-0
Chemical Formula: C20H20N2O3
Exact Mass: 336.1474
Molecular Weight: 336.39
Elemental Analysis: C, 71.41; H, 5.99; N, 8.33; O, 14.27

Synonym: DA 3505; DA-3505; DA3505;

IUPAC/Chemical Name: (E)-4-(4-hydroxy-3-methylbut-2-en-1-yl)-1,2-diphenylpyrazolidine-3,5-dione


InChi Code: InChI=1S/C20H20N2O3/c1-15(14-23)12-13-18-19(24)21(16-8-4-2-5-9-16)22(20(18)25)17-10-6-3-7-11-17/h2-12,18,23H,13-14H2,1H3/b15-12+

SMILES Code: C/C(=C\CC1C(=O)N(N(C1=O)c2ccccc2)c3ccccc3)/CO

Technical Data

Solid powder

>98% (or refer to the Certificate of Analysis)

Shipping Condition:
Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition:
Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Soluble in DMSO

Shelf Life:
>2 years if stored properly

Drug Formulation:
This drug may be formulated in DMSO

Stock Solution Storage:
0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code:


1: Spahn H, Mutschler E. [Determination of feprazone and one of its metabolites
in human plasma after high-performance liquid chromatographic or thin-layer
chromatographic separation]. J Chromatogr. 1982 Oct 8;232(1):145-53. German.
PubMed PMID: 7142323.