Listen to Pure Acid (Unreleased Bonustrack) online. Pure Acid (Unreleased Bonustrack) is an English language song and is sung by Kai Tracid. Pure Acid (Unreleased Bonustrack), from the album Trance & Acid, was released in the year 2011. The duration of the song is 8:10. Download English songs online from JioSaavn.