Ampicillin Trihydrate

Catalog No.S4148 Synonyms: NCI-C56086

For research use only.

Ampicillin Trihydrate (NCI-C56086) is a β-lactam antibiotic, which inhibits bacterial cell-wall synthesis (peptidoglycan cross-linking) by inactivating transpeptidases on the inner surface of the bacterial cell membrane.

Ampicillin Trihydrate Chemical Structure

CAS No. 7177-48-2

Selleck's Ampicillin Trihydrate has been cited by 1 Publication

Purity & Quality Control

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Biological Activity

Description Ampicillin Trihydrate (NCI-C56086) is a β-lactam antibiotic, which inhibits bacterial cell-wall synthesis (peptidoglycan cross-linking) by inactivating transpeptidases on the inner surface of the bacterial cell membrane.
Features More effective than levofloxacin and ciprofloxacin against Streptococcus pneumoniae.
beta-lactamase [1]
In vitro

Ampicillin Trihydrate (500 mg) results in rapid bactericidal effect for SP34, the concentrations declines to the limit of detection (100 CFU/mL) during the initial 6 hours, and regrowth is not observed over the remaining 18 hours. [1]

In vivo Ampicillin Trihydrate (10 mg/kg) results in half life (t 1/2) of 1.2 hours in goats and 2.48 hours in sheep, clearance (Cl) of 2921 mL/h·kg in goats and 262 mL/h·kg in sheep, ampicillin volume of distribution (Vdarea) of 5673 mL/kg in goats and 992 mL/kg in sheep. [2] Ampicillin Trihydrate (0.18 kg/kg-3 kg/kg) results in no dose-related mortality, normal body weights, no compound-related gross or histopathologic lesions and diarrhea in mice and rats. [3] Ampicillin in combination of norfloxacin, at a dose of 1g/L, maximally suppresses the numbers of cecal aerobic and anaerobic bacteria in ob/ob mice. Ampicillin in combination of norfloxacin results in a significant improvement in fasting glycemia and oral glucose tolerance reduced liver triglycerides and increased liver glycogen and concomitant reduction of plasma lipopolysaccharides in ob/ob mice. [4] Ampicillin trihydrate (20 mg/kg) treats five foals, the mean peak serum ampicillin concentration at two to three days old is 5.0 μg/mL at 1 hours after treatment, the mean peak serum concentration at 16 days to 21 days old is 2.7 μg/mL at 2 hours, the concentrations steadily declines and ampicillin is not detected in the serum from any of the foals by 24 hours, and serum clearance averages 17.7 mL/min/kg at two to three days and 35.8 mL/min/kg at 16 days to 21 days. [5]

Protocol (from reference)

Solubility (25°C)

In vitro

Chemical Information

Molecular Weight 403.45


CAS No. 7177-48-2
Storage 3 years -20°C powder
2 years -80°C in solvent
Smiles CC1(C(N2C(S1)C(C2=O)NC(=O)C(C3=CC=CC=C3)N)C(=O)O)C.O.O.O

In vivo Formulation Calculator (Clear solution)

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Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O, mix and clarify.

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

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
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Molarity Calculator

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Clinical Trial Information

NCT Number Recruitment Interventions Conditions Sponsor/Collaborators Start Date Phases
NCT04647331 Recruiting -- Infective Endocarditis Uppsala University June 1 2021 --
NCT03129620 Completed -- Hypothermia Drexel University March 2013 --
NCT01433757 Completed Drug: Ampicillin|Drug: Sugar pill DYT-1|Dystonia University of Florida|Tyler''s Hope for a Dystonia Cure Inc September 2011 Phase 1
NCT01118403 Withdrawn Drug: Sultamicillin Ventilator Associated Pneumonia Hospital Pablo Tobón Uribe March 2011 Phase 4

(data from, updated on 2022-08-01)

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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