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Isoeugenol

Carnation scent — regulated under EU Regulation 2023/1545 (expansion of declarable fragrance allergens from 26 to 81+).

Prepared by Allergen81 Compliance Team · Last reviewed September 2026. Provided for information only — always verify against the official regulation and your responsible person's assessment.

Sources & references

  • Commission Regulation (EU) 2023/1545 — full text on EUR-Lex
  • CosIng — the European Commission's cosmetic ingredient database
  • PubChem (NIH) — substance record for CAS 97-54-1

CAS Number

97-54-1

EC Number

202-590-7

INCI Name

ISOEUGENOL

Status

Declarable

Declaration thresholds (EU 2023/1545)

Leave-on products

0.100%

= 10 mg/kg (10 ppm)

Rinse-off products

1.00%

= 100 mg/kg (100 ppm)

Isoeugenol 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.

Essential oils containing Isoeugenol

Typical concentration ranges (of the oil itself, not the finished product):

Vetiver Oil0.1–0.5%Clove Bud Oil0.1–1%

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.

Check your formula against Isoeugenol automatically

Upload your supplier PDFs and Allergen81 extracts every allergen, runs the threshold math (including pre-hapten grouping), and generates your INCI-compliant label.

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Isoeugenol — FAQ

When does Isoeugenol need to be declared on a cosmetic label?

Under EU Regulation 2023/1545, Isoeugenol 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.

Which essential oils contain Isoeugenol?

Isoeugenol naturally occurs in: Vetiver Oil, Clove Bud Oil. Typical concentration ranges in these oils vary — always confirm with a supplier IFRA certificate or GC/MS report.

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