Regulation In the US, ricin appears on the select agents list of the Department of Health and Human Services, and scientists must register with HHS to use ricin in their research. However, investigators under the control of less than 1000 mg are exempt from regulation.
rEguLAtiOn In THe us, rICin appEArs On THe SeLecT AGents lISt oF the deparTmENT of healtH aNd hUMaN serVIcEs, And SCieNtists muST ReGisTer With hhs TO Use Ricin in tHeir reseaRch. howeVer, iNVeStigAtOrS under thE ConTROl Of less Than 1000 mG arE exempT frOm REguLaTion.