Catalog No.S4715

For research use only.

Benzamide, a derivative of benzoic acid, is an inhibitor of poly(ADP-ribose) polymerase with an IC50 of 3.3 μM.

Benzamide Chemical Structure

CAS No. 55-21-0

Selleck's Benzamide has been cited by 3 Publications

Purity & Quality Control

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Biological Activity

Description Benzamide, a derivative of benzoic acid, is an inhibitor of poly(ADP-ribose) polymerase with an IC50 of 3.3 μM.
PARP [4]
(Cell-free assay)
3.3 μM
In vitro

Benzamide, an inhibitor of PARP is protective against excitatory amino acid-induced cell death in primary cultures of neurons derived from neonatal rat brain. In addition, benzamide has more recently been shown to partially prevent the loss of dopaminergic cells and the increase in reactive gliosis caused by METH in vitro in fetal rat mesencephalic cells in culture[1]. Benzamide prevents transformation in a cell cycle-specific manner, maximal prevention coinciding with early S phase, also characteristic of maximal susceptibility to transformation[2].

In vivo PARP inhibitor benzamide is neuroprotective in C57Bl/6N mice against different types of neurotoxicities and without affecting body temperature[2]. Benzamide treatment significantly decreases the iNOS expression and number of apoptotic neurons and thereby improves the neuronal survival and memory during GCI. Benzamide administration (160 mg/kg i.p.) does not induce hypothermia and reaches the CNS in 30 min in the concentration range of 0.09-0.64 mM, at which, it shows neuroprotection[3].

Protocol (from reference)

Cell Research:


  • Cell lines: Primary human fibroblasts
  • Concentrations: 1 mM
  • Incubation Time: 10 hr
  • Method:

    Exposure to carcinogens and benzamide is done 10 hr after the release of the metabolically induced G1/S block and exposure lasts 10 hr, followed by three washings and refeeding with fresh media.

Solubility (25°C)

In vitro

DMSO 24 mg/mL
(198.11 mM)
Ethanol 24 mg/mL
(198.11 mM)
Water Insoluble

Chemical Information

Molecular Weight 121.14


CAS No. 55-21-0
Storage 3 years -20°C powder
2 years -80°C in solvent
Smiles C1=CC=C(C=C1)C(=O)N

In vivo Formulation Calculator (Clear solution)

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Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

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Molarity Calculator

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Clinical Trial Information

NCT Number Recruitment Interventions Conditions Sponsor/Collaborators Start Date Phases
NCT01161836 Completed Drug: Iniparib Advanced Solid Tumors Sanofi July 2010 Phase 1

(data from, updated on 2022-01-17)

Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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