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A0166 Sigma

Ampicillin sodium salt

powder, BioReagent, suitable for cell culture

Synonym: D-(−)-α-Aminobenzylpenicillin sodium salt

Properties

Related Categories A - K, Antibacterial, Antibiotic powders, Antibiotics, Antibiotics A to Z,
product line   BioReagent
form   powder
potency   ≥845 μg per mg
color   white with slight yellow cast
mp   215 °C (dec.)(lit.)
solubility   H2O: soluble50 mg/mL (Stock solutions should be stored at −20 °C.)
suitability   suitable for cell culture
storage temp.   2-8°C

Description

Application

Ampicillin is a semi-synthetic derivative of penicillin that functions as a broad-spectrum antibiotic. It has been used to study antibiotic resistance and penetration limitations, the synergy between multiple antibiotics, certain bloodstream infections, and has been used to develop PCR assays to detect resistance genes in cerebrospinal fluid.

Recommended for antibacterial use in cell culture media at 100 mg/L.
Recommended for use in ampicillin-resistance studies at 20-125 μg/ml.

Biochem/physiol Actions

Mode of Action: This is a ß-lactam antibiotic that inhibits bacterial cell-wall synthesis by inactivating transpeptidases on the inner surface of the bacterial cell membrane.

Mode of Resistance: Administration with ß-lactamase cleaves the ß-lactam ring of Ampicillin and inactivates it.

Antimicrobial Spectrum: Includes both gram-positive (similar to benzylpenicillin) and gram-negative bacteria (similar to tetracyclines and chloramphenicol.

Caution

This product has been reported stable as supplied at 25°C at 43% and 81% relative humidity for six weeks. It is stable at 37°C for three days. Additional studies have shown that the stability of Ampicillin in solution is a function of pH, temperature and the identity of the buffer. It′s activity is quickly lost when stored above pH 7. Optimal storage conditions are suggested as 2-8°C, and pH 3.8-5 where its activity was retained at 90%+ for a week.

Preparation Note

Ampicillin is reported as slightly soluble in water, practically insoluble in alcohol, chloroform, ether and fixed oils but soluble in dilute acids or bases. The solution should not be autoclaved; a stock solution should be sterilized through filtration and stored frozen, where it will be stable for months.

Protocols & Applications

Antibiotic Selector for application, solubility, solution stability, working concentration, and mode of action information

Price and Availability

Suggested Laboratory Gloves


Laboratory GlovesThis substance has been tested against several types of hand protection for CE compliance. Click below to find the recommended gloves for handling this product.




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