Mixed-mode stationary phase combining reversed-phase, cation-exchange, and anion-exclusion mechanisms. Provides broad retention for amino acids, hydrophilic and hydrophobic compounds, inorganic cations, basic drugs, and anionic counter-ions. Offers versatile selectivity across a wide range of compound classes, making it suitable for general-purpose pharmaceutical and analytical applications.Functional groups are integrated on a single ligand. A strong acidic group (pKa ~0) is positioned in the inner layer of the stationary phase close to the surface of silica gel, minimizing interaction with residual silanols and improving peak shape for basic analytes.Incorporates surface-bound ion-pairing functionality, enabling full MS compatibility without the need for mobile phase ion-pairing reagents. Provides comparable selectivity and retention to established mixed-mode stationary phases, enabling direct method transfer with minimal adjustment.