Tris(2,3-dibromopropyl) phosphate
Tris(2,3-dibromopropyl) phosphate ("tris") is a chemical once widely used as a flame retardant in plastics and textiles. == Safety and regulation == Tris is mutagenic and listed as an IARC Group 2A carcinogen.
Source: Wikipedia — Tris(2,3-dibromopropyl) phosphate (CC BY-SA 4.0)