The molecular formula C7H5NO4 (molar mass: 167.12 g/mol) may refer to:
- Dinicotinic acid, a dicarboxylic acid
- Dipicolinic acid, a dicarboxylic acid
- Nitrobenzoic acids, a group of benzoic acid derivatives
- Lutidinic acid, a dicarboxylic acid
- Quinolinic acid, a dicarboxylic acid