A parameter that reflects ionic charge and concentration in a solution. It governs how proteins dissolve, how emulsions behave, and how effectively preservatives and enzymes work — which is why brines, marinades, and processed-meat formulations are designed around it. Analysts also control ionic strength closely, since it affects the accuracy of many chemical measurements. Small changes in salt concentration can thus have outsized effects on texture, stability, and analytical results. Formulators manipulate it with salts and phosphates to tune texture and water-holding.