Unión Explosivos Río Tinto
| Company type | S.A. | 
|---|---|
| Industry | Mining, explosives, chemicals | 
| Founded | 1970 | 
| Defunct | 1989 | 
| Successor | Ercros | 
| Headquarters | Madrid | 
The Unión Explosivos Río Tinto (ERT) was a Spanish business conglomerate that operated between 1970 and 1989, being present in many industries of the country. At the time, it was the main Spanish business group by size and assets, with a network of companies that included more than forty subsidiaries.