NBQX disodium salt 25MG. NBQX disodium salt, CAS: 479347-86-9, MF: C12H6N4O6SNa2, Molecular Weight: 380. 24, Purity: greater than or equal to 98%, Appearance: Dark brown solid, Synonym: 2, 3-Dioxo-6-nitro-1, 2, 3, 4-tetrahydrobenzo[f]quinoxaline-7-sulfonamide disodium salt, Size: 25MG