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Canonical INCI monograph

ALPHA-ISOMETHYL IONONE

EU Annex III fragrance allergen

Alpha-Isomethyl Ionone is the organic compound that conforms to the formula

ALPHA-ISOMETHYL IONONE is listed in the European Commission CosIng inventory under the functional categories Skin Conditioning, Perfuming, with CAS number 127-51-5 and EC number 204-846-3. CosIng records a restriction against it (III/90), so check the corresponding Annex entry before formulating. In the free INCIDB sample it appears on 20 product labels, reaching position 9 on Cosmetic Product 8051739581140. It is on the EU Annex III fragrance-allergen list (Regulation (EC) 1223/2009 as amended by Regulation (EU) 2023/1545), so labelling rules apply above the regulated thresholds.

CAS REGISTRY NUMBER
127-51-5
EC NUMBER
204-846-3
COSING FUNCTIONS
Skin Conditioning, Perfuming
COSING RESTRICTION
III/90

Sample products containing ALPHA-ISOMETHYL IONONE

Label positions from the free INCIDB sample. A lower position means the ingredient is declared earlier, i.e. present in a higher proportion.

PRODUCT LABEL POSITION
Moisture Me Rich Total Results Shampoo #19
Stick déo Musk #10
powder touch #15
Crème réparatrice pieds très secs #34
Sport Blast Re-Energising 2-in-1 Body & Hair Shower Gel #17
Aroma Sensations Feel the Passion #17
Cosmetic Product 5601312601173 #15
Vitamin E Gentle Facial Wash #22

Query ALPHA-ISOMETHYL IONONE in the full snapshot

import pyarrow.parquet as pq

ingredients = pq.read_table('ingredients.parquet').to_pandas()
target = ingredients[ingredients['inci_name'] == "ALPHA-ISOMETHYL IONONE"]
print(target[['ingredient_id', 'functions', 'cas_number', 'is_common_allergen']])

The complete snapshot covers 18,583 products. Coverage of each enrichment column is published, both per distinct name and weighted by label occurrence — see the coverage table.

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