ALPHA-TERPINENE
ALPHA-TERPINENE is identified as a fragrance allergen subject to mandatory label declaration under Regulation (EC) No 1223/2009.
Regulatory data checked on 2026-09-05. The legal status follows Regulation (EC) No 1223/2009 and its annexes; the substance is identified from the European Commission's CosIng database.
About the ingredient
p-Mentha-1,3-diene; 1-Methyl-4-isopropyl-1,3-cyclohexadiene; 1-Methyl-4-(1-methylethyl)-1,3-cyclohexadiene
EU regulatory status
Annex of Regulation (EC) No 1223/2009: III/131
What entry III/131 of the Regulation says
p-Mentha-1,3-diene
Source: the European Commission's official CosIng database and Regulation (EC) No 1223/2009 of the European Parliament and of the Council on cosmetic products. How we assess ingredients — full methodology.
- View the entry in the CosIng database (European Commission)
- Open Regulation 1223/2009 in EUR-Lex
- Check the chemical profile in PubChem
Last updated:
New labelling obligation
ALPHA-TERPINENE is on the extended fragrance-allergen list of Regulation (EU) 2023/1545. Products placed on the market after 31 July 2026 must name it on the label when its concentration exceeds 0.001% (leave-on) or 0.01% (rinse-off).
The full list of new allergens and the deadlines — read the articleFunctions in cosmetics
Frequently asked questions
Is ALPHA-TERPINENE safe in cosmetics?
ALPHA-TERPINENE is a fragrance allergen that must be named in the ingredient list once it exceeds 0.001% in leave-on products or 0.01% in rinse-off products. Regulation (EU) 2023/1545 extended this labelling duty well beyond the original 26 substances.
In which annex of Regulation 1223/2009 does ALPHA-TERPINENE fall?
ALPHA-TERPINENE falls under reference III/131 in the annexes of Regulation (EC) No 1223/2009 on cosmetic products. An annex entry may name a substance directly or cover it as part of a broader category. The first part (Roman numeral) indicates the annex: II – prohibited substances, III – substances restricted by conditions, IV – permitted colorants, V – permitted preservatives, VI – permitted UV filters.
What functions does ALPHA-TERPINENE perform in cosmetics?
According to the European Commission's CosIng database, ALPHA-TERPINENE performs the following functions in cosmetics: PERFUMING. Functions are defined in the CosIng glossary and describe the technological role of a substance in the finished product.
Are there Safety Gate alerts concerning ALPHA-TERPINENE?
Our copy of the EU Safety Gate database currently contains no alerts linking ALPHA-TERPINENE to a cosmetic recall. The database is refreshed regularly from the European Commission's official Safety Gate system.