Industrial Chemicals (Notification and Assessment) Regulations 1990
4BPolymer of low concern—number average molecular weight that is 10,000 or greater (Act s 5)
Start here
Get a plain-English read of 4B
Turn the raw legal text into a practical explanation grounded in Industrial Chemicals (Notification and Assessment) Regulations 1990.
4B Polymer of low concern—number average molecular weight that is 10,000 or greater (Act s 5)
For the purposes of subparagraph (a)(i) of the definition of polymer of low concern in subsection 5(1) of the Act, the characteristics relating to weight for a polymer that has a number average molecular weight that is 10,000 or greater are that the polymer must: (a) have less than 2% by mass of molecules with molecular weight that is less than 500; and (b) have less than 5% by mass of molecules with molecular weight that is less than 1,000.