Major component in citrus oils; oxidizes to allergens — regulated under EU Regulation 2023/1545 (expansion of declarable fragrance allergens from 26 to 81+).
CAS Number
5989-27-5
EC Number
227-813-5
INCI Name
LIMONENE
Status
Declarable
Leave-on products
0.100%
= 10 mg/kg (10 ppm)
Rinse-off products
1.00%
= 100 mg/kg (100 ppm)
Limonene must be separately declared in the ingredient list (INCI) when its concentration in the finished product exceeds these values. Below the threshold, no separate mention is required.
Typical concentration ranges (of the oil itself, not the finished product):
Example: at 1.5% lavender oil in a leave-on cream with linalool at up to 45%, the product contains up to ~0.68% linalool — far above the 0.001% threshold, so it must be declared.
Upload your supplier PDFs and Allergen81 extracts every allergen, runs the threshold math (including pre-hapten grouping), and generates your INCI-compliant label.
Under EU Regulation 2023/1545, Limonene must be listed separately in the ingredient declaration (INCI) when its concentration in the finished product exceeds 0.100% in leave-on products or 1.00% in rinse-off products.
Limonene naturally occurs in: Lavender Oil, Lemon Oil, Bergamot Oil, Sweet Orange Oil, Grapefruit Oil, Peppermint Oil, Tea Tree Oil, Eucalyptus Oil, Chamomile German Oil, Chamomile Roman Oil, Frankincense Oil, Myrrh Oil, Cedarwood Atlas Oil, Cedarwood Virginian Oil, Geranium Oil, Palmarosa Oil, Vetiver Oil, Rosemary Oil, Thyme Oil (Red), Neroli Oil, Petitgrain Oil. Typical concentration ranges in these oils vary — always confirm with a supplier IFRA certificate or GC/MS report.
Yes. Limonene is a pre-hapten: on air exposure it oxidizes to Limonene hydroperoxides, which are stronger sensitizers. Fresh product and antioxidant-stabilized formulations reduce this risk.