6-Nitro Veratric Acid, with CAS number 4998-07-6, is a chemical compound also known as 4,5-Dimethoxy-2-Nitrobenzoic Acid. It is a yellowish crystalline powder, has a melting point of 195-197°C, and its molecular formula is C9H9NO6. It is used as an API intermediate, specifically in the manufacturing of gefitinib, an anti-cancer drug.