Water soluble, potent competitive kainate/quisqualate (non-NMDA) receptor antagonist. More soluble form of CNQX (ALX-550-042). Alternative name: 6-Cyano-7-nitroquinoxaline-2,3-dione . 2Na. Purity: ≥98% (TLC). Appearance: Rust red solid. Solubility: Soluble in water (5mg/ml). Long Term Storage: -20°C.