Natamycin (E235) is an antifungal compound used mainly in dairy and other foods to control yeast and mold. It is effective in surface treatments, typically preserves sensory quality, and is compatible with maturation processes.
Natamycin binds to sterols (mainly ergosterol) in fungal cell membranes and helps stop growth (fungistatic). It differs from some preservatives (e.g., sorbates/benzoates) that act via membrane permeabilization.
Natamycin has low solubility in water; suspension-based surface use is common. At pH>9 or pH<3 solubility may increase, but antifungal activity can be affected.
