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            CYCLOHEXASILOXANE
        

Canonical INCI monograph

CYCLOHEXASILOXANE

Not on the EU Annex III list

Cyclohexasiloxane is the cyclic dimethyl polysiloxane that conforms to the formula, where n equals 6, and the other components of cyclomethicone (where n equals 4, 5, or 7) are present at levels of less than 1%.

CYCLOHEXASILOXANE is listed in the European Commission CosIng inventory under the functional categories Skin Conditioning - Emollient, Hair Conditioning, Solvent, with CAS number 540-97-6 and EC number 208-762-8. CosIng records a restriction against it (Restricted under COMMISSION REGULATION (EU) 2024/1328. 1. Shall not be placed on the market (a) as a substance on its own; (b) as a constituent of other substances; or (c) in mixtures; in a concentration equal to or greater than 0,1 % by weight of the respective substance after 6 June 2026. [...] 3. By way of derogation: (a) for D4 and D5 in wash-off cosmetic products, paragraph 1, point (c), shall apply after 31 January 2020. For the purposes of this point, “wash-off cosmetic products” means cosmetic products as defined in Article 2(1), point (a), of Regulation (EC) No 1223/2009 of the European Parliament and of the Council (*1) that, under normal conditions of use, are washed off with water after application; (b) for all cosmetic products other than the ones mentioned in paragraph 3(a), paragraph 1 shall apply after 6 June 2027.), so check the corresponding Annex entry before formulating. In the free INCIDB sample it appears on 1 product label, reaching position 7 on Sublime Sun Lait protecteur anti-dessèchement FPS 30.

CAS REGISTRY NUMBER

540-97-6

EC NUMBER

208-762-8

COSING FUNCTIONS

Skin Conditioning - Emollient, Hair Conditioning, Solvent

COSING RESTRICTION

Restricted under COMMISSION REGULATION (EU) 2024/1328.
1. Shall not be placed on the market
(a) as a substance on its own;
(b) as a constituent of other substances; or
(c) in mixtures; in a concentration equal to or greater than 0,1 % by weight of the respective substance after 6 June 2026. 
[...] 
3. By way of derogation: 
(a) for D4 and D5 in wash-off cosmetic products, paragraph 1, point (c), shall apply after 31 January 2020. For the purposes of this point, “wash-off cosmetic products” means cosmetic products as defined in Article 2(1), point (a), of Regulation (EC) No 1223/2009 of the European Parliament and of the Council (*1) that, under normal conditions of use, are washed off with water after application;
(b) for all cosmetic products other than the ones mentioned in paragraph 3(a), paragraph 1 shall apply after 6 June 2027.

Sample products containing CYCLOHEXASILOXANE

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
Sublime Sun Lait protecteur anti-dessèchement FPS 30	#7

Query CYCLOHEXASILOXANE in the full snapshot

import pyarrow.parquet as pq

ingredients = pq.read_table('ingredients.parquet').to_pandas()
target = ingredients[ingredients['inci_name'] == "CYCLOHEXASILOXANE"]
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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