Two rival cliques in Brooklyn organized a catfight via Facebook that left six of the women with chemical burns and two others stabbed, cops said.

The melee unfolded around 11:20 p.m. Wednesday on Schenectady Avenue and Carroll Street, where the women decided to meet, according to police.

An 18-year-old woman was stabbed in the left arm and a 20-year-old suffered a stab wound to the back, cops said.

They were being treated at Kings County Hospital in stable condition, authorities said.

Six others were doused with Drano, a drain cleaner, and were rushed to Weill Cornell Medical Center for chemical burns, officials said.

The motive behind the wild brawl is still unclear, cops said.

All of the women will likely face criminal charges, police said.