The law defines the responsibilities of those producing chemicals, placing them on the market, exporting, importing or using them.
Parliament also passed a new law on the state commission controlling public procurement.
Amendments to laws on misdemeanors, land books, defence, military service and mining were sent into second reading.
Bills on cultural councils and electronic media were also sent into second reading.
MPs ratified a number of European regulations and memoranda as well as treaties, including with Montenegro on Euro-Atlantic partnership.
Parliament will reconvene on Tuesday.