Do I need EPA registration to sell a private label toilet bowl cleaner?

Only if your product label makes pesticidal claims — such as 'kills 99.9% of bacteria' or 'disinfects.' Products marketed solely for cleaning, stain removal, or deodorizing without kill claims are generally not subject to FIFRA registration but must still comply with CPSC labeling and OSHA HazCom rules. Your household formulator can advise on claim language before you go to print. AJ Cosmo Labs connects you with formulators who have navigated EPA registration for household disinfectants.