0.1 M Sodium Citrate, pH 5.0 is an aqueous citrate buffer that maintains mildly acidic conditions for laboratory procedures in biochemistry, microbiology, and molecular biology.
Applications include pH control in enzyme assays requiring acidic conditions, preparation of citrate-based wash and elution solutions, conditioning of chromatography resins, and sample processing workflows where chelation of divalent cations (e.g., Ca2+, Mg2+) is desired. It can be used to dilute reagents, adjust pH, and prepare citrate-containing media or buffers for handling microbial samples such as E. coli.