Orange Oil, Sweet

Orange oil, sweet (CAS 8008-57-9) is a cold-pressed citrus peel essential oil used in cleaning products as both a fragrance ingredient and a mild solvent. Its primary active constituent is d-limonene (typically 90–95% of the oil by weight). **Asthmagen status:** d-Limonene, the dominant component, is on the AOEC (Association of Occupational and Environmental Clinics) asthmagen list as a workplace sensitizer. Orange oil sweet inherits this designation. However, at product-level fragrance concentrations (0.1–1% of concentrate), the asthmagen risk is primarily relevant for occupationally exposed workers with repeated daily exposure — not for home detailers using the product occasionally. The asthmagen flag is set here for accurate ingredient-level disclosure; product-level scoring applies the category rubric rules for asthmagen triggers. **Skin sensitization:** d-Limonene (H317 Skin Sens. Cat 1) is among the most common causes of occupational contact allergy in European patch-test studies. At fragrance concentrations in APCs, cumulative sensitization over repeated use is the primary mechanism. Users who develop a limonene allergy may react to products at concentrations well below the GHS classification threshold. **Aspiration hazard:** H304 (Asp. Tox. 1) at ingredient level reflects orange oil's viscosity and lipophilicity — relevant only for accidental ingestion scenarios, not for skin contact or inhalation during normal use.