Olfactory Pyramid, IFRA 51st Allergens & Volatility Workbench
Model finished-product allergen percentages (linalool, limonene, eugenol) against EU Regulation 2023/1545 (0.001% leave-on disclosure) and IFRA 51st Amendment Category 4 ceilings while projecting top-to-base evaporation endurance.
1. Fragrance Concentration Class
2. Botanical Accord Matrix
3. Cold Maceration Duration (12 C Dark Vat)
35 d
4. Skin Hydration & Ambient Profile
Allergen Load
0.810%
Eugenol Cat. 4
0.144% / 0.500%
Skin Tenacity
5.0 - 6.1 hrs
IFRA 51st Category 4 Limits vs. EU 2023/1545 Labeling Thresholds
Category 4 covers hydroalcoholic and non-hydroalcoholic fine fragrances applied directly to skin. Whereas IFRA safety caps restrict maximum allowable concentration to prevent sensitization, EU Regulation 2023/1545 triggers mandatory INCI packaging disclosure at much lower trace thresholds.
| Allergen / Botanical Compound | CAS Number | IFRA 51st Cat. 4 Cap | EU Leave-On Disclosure | Primary Botanical Source |
|---|---|---|---|---|
| Linalool (oxidized peroxide <20 mmol/L) | 78-70-6 | Specification (peroxide cap) | 0.001% (10 ppm) | Bergamot, Lavender, Coriander, Rosewood |
| d-Limonene (peroxide <20 mmol/L) | 5989-27-5 | Specification (peroxide cap) | 0.001% (10 ppm) | Calabrian Bergamot, Black & Blue Pepper |
| Eugenol | 97-53-0 | 0.50% max in finished product | 0.001% (10 ppm) | Madagascar Clove Bud, Ylang-Ylang, Rose |
| Isoeugenol | 97-54-1 | 0.11% max in finished product | 0.001% (10 ppm) | Nutmeg, Ylang-Ylang, Carnation bases |
| Oakmoss (Atranol / Chloroatranol) | 90028-68-5 | 0.10% (atranol <100 ppm) | 0.001% (10 ppm) | Evernia prunastri Chypre bases |