Standard substances used for redox titration

For general information of what the standard substance is and what criteria it should meet, please read the standard substances page.

Remember to use analytical reagents (AR grade) for standards.

Sodium oxalate Na₂C₂O₄ - dry at 105-110°C. Equivalent weight is one-half the formula weight (133.9985 g).

Arsenic oxide As₂O₃ - dry for 2 hours at 105-110°C. Equivalent weight is one-fourth the formula weight (197.8414 g).

Potassium iodate KIO₃ - dry for 2 hours at 150°C. Equivalent weight is one-sixth the formula weight (214.001 g).