Written by Carlos Lara and co-produced with Pedro Damián, it was released as the lead single for the group's fourth Spanish-language studio album, Empezar Desde Cero (2007).

The video features multiple special effects and shows each of the members of RBD going through a tough time, when suddenly some of their fans come to give them courage and support.

On December 12, 2007, the group appeared without band member Alfonso Herrera at the FOX Sports Awards, where they performed the single.

On February 24, the group performed the song on Latin American Boomerang's Boom Box en Estudio.

Also in 2008, the group performed "Inalcanzable" on the Latin American musical variety TV show Noche de Estrellas, hosted by Mexican singer Yuri.

Judy-Cantor Navas, director of online music service Rhapsody, complimented the song for being a "beautiful and sweet collective ballad.

[22] In the United States, "Inalcanzable" debuted at number thirty-six on the Billboard Latin Pop Songs airplay chart on November 4, 2007.