X:IN released the digital edition of their first full-length album “Chain Reaction” on October 6.

X:IN’s first full-length album “Chain Reaction” is now available digitally, and the useful part is separating what listeners can play today from what arrives later in physical form.

Agency-sourced coverage from Sports Kyunghyang and Maeil Business says the album contains 11 tracks and is led by “ZZIRIT,” a collaboration with Brazilian pop artist Luísa Sonza. Another collaboration, “Neurotox:in,” features tiLLie. The album’s track names repeatedly use chemistry and reaction imagery—“Brain Chemistry,” “Octane,” “Chemical Moment,” “Zero Kelvin,” “H₂O” and “pH7”—which makes the “Chain Reaction” title more than a label pasted onto an unrelated track list.

The more important creative detail is that all five X:IN members participated in lyric writing. That gives the group a clearer authorship angle on its first studio-length project instead of making the story only about outside collaborators.

There is also a practical release split fans should not miss. The digital album is out on October 6, while Music Korea’s product listing sets the physical CD release for October 20. Fans buying a physical copy should therefore check the current retailer page for stock, shipping dates and version details rather than assuming the digital and physical schedules are the same.

For a first full album, “Chain Reaction” is doing three jobs at once: expanding X:IN’s catalog to 11 songs, putting member-written material at the center, and widening the group’s international collaboration network. FavPulse will keep this story tied to verified release information rather than turning every teaser or product variation into a separate thin post.