Chlorinated paraffins (CPs, polychlorinated n-alkanes) are versatile, high-production-volume chemicals. A previous study indicated that hand blenders leak CPs into prepared food. (1) to estimate exposure to CPs from hand blender use compared to background CP exposure from diet; (2) to assess the risk from human dietary exposure to CPs from hand blender use; (3) to investigate how hand blenders leak out CPs. CPs were analyzed in food market baskets, in cooking oil/water samples (1g oil/100mL water) mixed using 16 different hand blenders, and in dismantled components of the hand blenders. Dietary intake of CPs from food market baskets was calculated to be 4.6μg/day per capita for Swedish adults. Total CP amounts in oil/water leakage samples ranged from <0.09 to 120μg using the hand blenders once. CP leakage showed no decreasing levels after 20 times of hand blender usage. CP profiles in the leakage samples matched those of self-lubricating bearings and/or polymer components disassembled from the hand blenders. Usage of 75% of the hand blenders tested will lead to increased human exposure to CPs. The intake of CPs for Swedish adults by using hand blenders once a day can raise their daily dietary intake by a factor of up to 26. The 95th percentile intake of CPs via using the hand blenders once a day exceeded the TDI for Swedish infants with a body weight <7.2kg. CP leakage came from blender components which contain CPs. The leakage may last several hundred times of hand blender use. •Human daily dietary exposure to chlorinated paraffins can be significantly increased by using hand blenders.•Chlorinated paraffin intake via hand blender use exceeded the tolerable daily intake for infants with a body weight <7.2kg.•C6 – C22 chlorinated paraffins were identified in the leakage from the hand blender use.•The leakage came from blender components which contain chlorinated paraffins.