▁chemical ▁re actions . ▁ ▁Pre par ation ▁ ▁D ry ▁an il ine ▁are ▁dissol ved ▁in ▁dry ▁carbon ▁t et rach lor ide , ▁and ▁placed ▁in ▁a ▁flask ▁fitted ▁with ▁a ▁mechanical ▁stir rer . ▁The ▁flask ▁is ▁surrounded ▁by ▁an ▁efficient ▁free zing ▁mixture , ▁so ▁that ▁the ▁temperature ▁is ▁about ▁- 1 0   ° C . ▁Through ▁one ▁of ▁the ▁side ▁tub es ▁is ▁passed ▁dry ▁g ase ous ▁ch lor ine ▁mixed ▁with ▁dry ▁carbon ▁dio x ide ▁( equal ▁volumes ). ▁A ▁white ▁cry st all ine ▁depos it ▁of ▁ 2 , 4 , 6 - tr ich lor o an il ine ▁is ▁thrown ▁down , ▁but ▁if ▁the ▁temperature ▁r ises , ▁ox id ants ▁are ▁added , ▁or ▁the ▁materials ▁are ▁not ▁absolutely ▁dry , ▁the ▁product ▁is ▁cont amin ated ▁with ▁an il ine ▁black ▁( pol yan il ine ). ▁ ▁Saf ety ▁ ▁Occ up ational ▁expos ure ▁to ▁ 2 , 4 , 6 - tr ich lor o an il ine ▁may ▁occur ▁through ▁in hal ation ▁and ▁der mal ▁contact ▁with ▁this ▁comp ound ▁at ▁work p laces ▁where ▁ 2 , 4 , 6 - tr ich lor o an il ine ▁is ▁produced ▁or ▁used ▁( S RC ). ▁The ▁general ▁population ▁may ▁be ▁exposed ▁to ▁ 2 , 4 , 6 - tr ich lor o an il ine ▁via ▁drink ing ▁water ▁and ▁der mal ▁contact ▁with ▁this ▁comp ound ▁in