The CPSC banned tris(2,3-dibromopropyl) phosphate in children's sleepwear in the 1970s, and its use in consumer textiles remains restricted. While the chemical itself can be imported for industrial or research purposes, importers of finished textile articles containing it face CPSC enforcement risk and should verify end-use compliance before entry.

Aromatic phosphoric esters (291990) are derived from phosphoric acid (H₃PO₄) and contain an aryl group, while thiophosphoric esters — classified in the heading covering esters of inorganic acids — contain a sulfur atom replacing one of the oxygen atoms in the phosphate group. The presence or absence of that sulfur substitution is the key structural distinction driving classification.