Use
Trichlorophenols exists as 6 isomers (2,4,5-;
3,4,5-; 2,4,6-; 2,3,4-; 2,3,5-and 2,3,6-). The most important
(heavily regulated) are the 2,4,5-and 2,4,6-isomers. The
2,4,5-isomer is white powder or needles; 2,3,5-and 2,3,6-
are colorless crystals; 2,4,5-is a gray crystalline solid or
flakes; 2,4,6-is a colorless to light yellow crystalline solid.
They have a phenolic odor.