There were two variants of Goma-2: Goma-2 EC and Goma-2 ECO. As of 2017, the manufacturer MAXAM Corp. S. L. has reformulated the Goma-type ammonia gelatine dynamites which are marketed worldwide under the new Riodin trade name.
Goma-2 explosive was a mixture of several chemicals:
- Ammonium nitrate - 60—70%
- Nitroglycol - 26—34%
- Nitrocellulose - 0.5—2%
- Dibutyl phthalate - 1—3%
- Fuels - 1—3%
As with other commercial blasting explosives, detonators were needed to initiate a detonation (usually a blasting cap # 8).
Goma-2 ECO was the explosive that was used in the 2004 Madrid train bombings. Terrorist Jamal Ahmidan, also known as El Chino, bought the explosive illegally from a mine in northern Spain. It was also planned by the same cell that carried out the Madrid bombings to use the explosive to derail a high-speed train. About 80 kilograms of the explosive was used by ETA in Operation Ogro to assassinate Luis Carrero Blanco. The explosion was so powerful it threw Blanco's car over a five storey building.