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C0378 Sigma

Chloramphenicol

≥98% (HPLC)

Synonym: D-(−)-threo-2,2-Dichloro-N-[β-hydroxy-α-(hydroxymethyl)-β-(4-nitrophenyl)ethyl]acetamide, D-(−)-threo-2-Dichloroacetamido-1-(4-nitrophenyl)-1,3-propanediol, D-threo-2,2-Dichloro-N-[β-hydroxy-α-(hydroxymethyl)-4-nitrophenethyl]acetamide, Chloromycetin

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Properties

Related Categories A - K, Antibacterial, Antibiotics, Antibiotics A to Z, Antibiotics A-F,
Quality Level   PREMIUM
assay   ≥98% (HPLC)
mp   148-150 °C(lit.)
antibiotic activity spectrum   Gram-negative bacteria
  Gram-positive bacteria
  mycobacteria
  mycoplasma
Gene Information   human ... CYP1A2(1544)

Description

Application

Chloramphenicol is a synthetic antibiotic, isolated from strains of Streptomyces venezuelae. It is often used for bacterial selection in molecular biology applications at 10-20 μg/mL and as a selection agent for transformed cells containing chloramphenicol reistance genes.

Biochem/physiol Actions

Mode of Action: Chloramphenicol inhibits bacterial protein synthesis by blocking the peptidyl transferase step by binding to the 50S ribosomal subunit and preventing attachment of aminoacyl tRNA to the ribosome. It also inhibits mitochondrial and chloroplast protein synthesis and ribosomal formation of (p)ppGpp, de-pressing rRNA transcription.

Mode of Resistance: Use of chloramphenicol acetyltransferase will acetylate the product and inactivate it.

Antimicrobial Spectrum: This is a broad spectrum antibiotic against gram-positive and gram-negative bacteria, and is used mainly for ophthalmic and veterinary purposes.

Caution

Stock solutions should be stored at 2-8°C and are stable at 37°C for 5 days. Aqueous solutions are neutral and stable over a wide pH range, with 50% hydrolysis occurring after 290 days. Use of a borax buffered solution reduces this number to 14%. Solutions should be protected from light as photochemical decomposition results in a yellowing of the solution. Heating aqueous solutions at 115°C for 30 minutes results in a 10% loss of chloramphenicol.

Packaging

1 kg in poly bottle

5, 25, 100, 500 g in poly bottle

Preparation Note

A solution at 50 mg/mL in ethanol yields a clear, very faint, yellow solution. Degradation of chloramphenicol in aqueous solution is catalyzed by general acids and bases. This rate of degradation is independent of the ionic strength and pH.

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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Safety & Documentation

Safety Information

Symbol 
GHS08  GHS08
Signal word 
Danger
Hazard statements 
Precautionary statements 
RIDADR 
UN 2811 6.1 / PGIII
WGK Germany 
3
RTECS 
AB6825000
Protocols & Articles

Articles

Fast Extraction and Low Level Detection of Chloramphenicol in Shrimp

QuEChERS Sample Preparation Using Z-Sep+ Sorbent and Analysis by Ascentis Express C18 LC-MS/MS
Emily Barrey, Olga Shimelis, Michael Halpenny, Jennifer Claus
Reporter US Volume 32.1
Keywords: Adsorption, Antibiotics, Carcinogens, Gas chromatography, Gas chromatography mass spectrometry, High performance liquid chromatography, Liquid chromatography mass spectrometry, Mass spectrometry, Pesticides, Phase transitions, Precipitation, Sample preparations, Solid phase extractions, Solvents

Protocols

Enzymatic Assay of Chloramphenicol Acetyltransferase

To standardize a procedure for the determination of the enzymatic assay of Chloramphenicol Acetyltransferase.
Keywords: Enzyme activity, Enzymology, Extinction coefficient

Transforming E. coli with Engineered Plasmid

Inoue and colleagues developed this method in 1990. It works well for many strains commonly used in cloning. The original method calls for growing the overnight E. coli cultures at 18°C. We find that...
Keywords: Antibiotics, Centrifugation, Cloning, Peptide synthesis, Phase transitions, transformation

Peer-Reviewed Papers
15

References

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