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Goma-2 was a type ofhigh explosive manufactured for industrial use (chieflymining) by Unión Española de Explosivos S.A.
It was a gelatinous,nitroglycol-based explosive widely used within Spain and exported abroad.It was used byETA in the 1980s and 1990s.
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:[1]
As with other commercial blasting explosives, detonators were needed to initiate a detonation (usually ablasting cap # 8).
Goma-2 ECO was the explosive that was used in the2004 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. In 1973, about 80 kilograms of the explosive was used byETA inOperation Ogro to assassinateLuis Carrero Blanco. The explosion was so powerful it threw Blanco's car over a five story building.