Found in: It is used as a solvent in many all-purpose cleaning products, especially ‘citrus’ and ‘orange’ cleaners. Also listed on labels as citrus oil and orange oil.
Health Risks: This chemical is produced by cold-pressing orange peels. The extracted oil is 90% d-limonene. It is a sensitizer, a neurotoxin, a moderate eye and skin irritant, and can trigger respiratory distress when vapours are inhaled by some sensitive individuals. There is some evidence of carcinogenicity. D-limonene is the active ingredient in some insecticides.