| Chemistry name: | iron tannate; iron gallotannate |
| M Formula: | Fe2(C14H7O9)(OH)3 |
| Properties: | |
| Dark-brown or bluish-black powder. Variable composition. Soluble in alkalies and dilute acids; insoluble in water, alcohol, and ether. Combustible. | |
| Derivation: | |
| Interaction of ferric acetate and tannic acid solutions. | |
| Use: | |
| Medicine. | |