"Benzene" was first uploaded on November 8th 2008. It is Owata-P's first original work using Kagamine Len, and is also the first track to his Benzene＼(^o^)／ Series, a series most notable from the song Paradichlorobenzene and Antichlorobenzene. Like many of his works it has reached Nico hall of fame (for exceeding 100,000 views).
It's also featured in Owata-P's album "Tsumanne＼(^o^)／", and to date has over 300,000 views, making it the current third popular song of the series. Owata-P said in his description that the song is mainly "an instrumental song", for the "lyrics" comes in at 1:30 of the song. Two years later he uploaded an "RX Benzene"; an arrangement sung by the utaite "Ritsuka". Two years after RX Benzene, following the Benzene Series' pattern, Owata-P uploaded another RX Benzene, sung by the derivatives Haku Yowane and Akita Neru.
The song has no definite meaning, with the lyrics being mostly repeated, though interpretations are opened nonetheless. It is said that the "people who laugh" in Paradichlorobenzene and Antichlorobenzene refers to this song, "Benzene", and presumably "Nitrobenzene" as well.