This two-component mixture leverages the complementary antimicrobial mechanisms of sodium lactate (membrane disruption, water activity reduction) and sodium acetate (direct pH reduction in the microbial cytoplasm, undissociated acid penetration). Together they provide broader-spectrum inhibition than either salt alone, particularly against Listeria monocytogenes — the primary pathogen of concern in ready-to-eat deli meats and refrigerated prepared foods.
Typical liquid formulations contain 50–60% total solids. Both components are GRAS under FDA (21 CFR 184.1768 and 184.1721) and approved as food additives E262 (sodium acetate) and E325 (sodium lactate) in the EU. Use levels are typically 1.0–4.8% in finished meat products, depending on USDA regulatory limits for the specific product category.