Ordinance
on Protection against Dangerous Substances and Preparations
(Chemicals Ordinance, ChemO)

Man­u­fac­tur­ers must re­as­sess or fur­ther as­sess sub­stances, pre­par­a­tions and ob­jects con­tain­ing dan­ger­ous con­stitu­ents and, where ne­ces­sary, re­clas­si­fy, re­la­bel and re­pack­age them if:

a.

they are to be sup­plied for dif­fer­ent pur­poses;

b.

they are to be used in a dif­fer­ent way;

c.

they are to be used in much lar­ger quant­it­ies than be­fore;

d.

vari­ations arise in the nature and quant­ity of im­pur­it­ies, which could have ad­verse ef­fects on hu­man health or the en­vir­on­ment;

e.

the as­sess­ment of the risks they pose to hu­man health or the en­vir­on­ment needs to be mod­i­fied in the light of prac­tic­al ex­per­i­ence, new data or new in­form­a­tion.