R66-52-4. Foreign Matter Standards

A sample and related batch of kratom product fail quality assurance testing if: (1) the sample contains foreign matter visible to the unaided human eye; (2) the sample is found to contain microscopic foreign matter considered to be harmful or estimated to comprise greater than 3% of the mass of the representative sample as determined by the testing laboratory; or (3) foreign matter is found that is suspected to have been intentionally added to the sample to increase its visual appeal or market value.