Sodium chromate is a chemical compound composed of sodium ions and chromate ions. It is a bright yellow crystal chemical. It is similar to potassium chromate. It is a strong oxidizing agent. It is toxic because it contains chromium in the +6 oxidation state. It can be destroyed by reaction with a reducing agent, converting it to harmless chromium in the +3 oxidation state. Its chemical formula is Na2Cr2O4.