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Annex III Entry 182 23/05/2013

1-(5,6,7,8-Tetrahydro-3,5,5,6,8,8,-hexamethyl-2-naphthyl)ethan-1-one (AHTN)

1-(5,6,7,8-Tetrahydro-3,5,5,6,8,8,-hexamethyl-2-naphthyl)ethan-1-one (AHTN) is listed in Annex III and may only be used under the conditions shown in this record. Maximum concentration in this record: (a) leave-on products: 0.1% except:hydroalcoholic products: 1% fine fragrance: 2.5%fragrance cream: 0.5% (b) rinse-off products: 0.2%.

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Restricted substance— Annex III, EU Regulation 1223/2009
Max conc.: (a) leave-on products: 0.1% except:hydroalcoholic prod…
Entry: 182

Record details

Maximum concentration

(a) leave-on products: 0.1% except:hydroalcoholic products: 1% fine fragrance: 2.5%fragrance cream: 0.5% (b) rinse-off products: 0.2%

Product type

All cosmetic products with the exception of oral products

Chemical name

1-(5,6,7,8-Tetrahydro-3,5,5,6,8,8,-hexamethyl-2-naphthyl)ethan-1-one (AHTN)

Regulatory information

Regulation

(EC) 2013/344

SCCS opinions

Identified ingredients

Key data

CAS
21145-77-7 - 1506-02-1
EC
244-240-6 - 216-133-4
Annex
III
Entry number
182

Inventory links for 1-(5,6,7,8-Tetrahydro-3,5,5,6,8,8,-hexamethyl-2-naphthyl)ethan-1-one (AHTN)

Direct matches are limited for this record, so nearby entries from Annex III are shown as well.

Annex III 183
Nearby record in the same annex

OPOPONAX OIL

CAS: 93686-00-1
EC: 297-649-7
Annex III 185
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TOLUENE

CAS: 108-88-3
EC: 203-625-9
Annex III 187
Nearby record in the same annex

BUTOXYDIGLYCOL

CAS: 112-34-5
EC: 203-961-6
Annex III 176
Nearby record in the same annex

ISOCYCLOGERANIOL

CAS: 68527-77-5
EC: 271-282-2
Annex III 188
Nearby record in the same annex

BUTOXYETHANOL

CAS: 111-76-2
EC: 203-905-0

What Annex III means for 1-(5,6,7,8-Tetrahydro-3,5,5,6,8,8,-hexamethyl-2-naphthyl)ethan-1-one (AHTN)

1-(5,6,7,8-Tetrahydro-3,5,5,6,8,8,-hexamethyl-2-naphthyl)ethan-1-one (AHTN) is a restricted substance under Annex III of EU Cosmetics Regulation 1223/2009. Its use in cosmetics is only permitted under the specific conditions set out in the entry above, including applicable concentration limits, product type restrictions and required warning statements.

When including this substance in a formulation, all conditions — maximum concentration, product scope and warning labels — must be met simultaneously. Compliance with one condition does not override the others.

This record is linked to 1 CosIng inventory ingredient for name and identifier cross-reference. The page also surfaces 12 related annex records with overlapping identifiers, annex logic or naming patterns.

Compliance checklist

  • Ensure formulation concentration does not exceed: (a) leave-on products: 0.1% except:hydroalcoholic products: 1% fine fragrance: 2.5%fragrance cream: 0.5% (b) rinse-off products: 0.2%
  • Confirm product type compatibility: All cosmetic products with the exception of oral products
  • Document conditions of use in the Product Information File (PIF).

Frequently asked questions

1-(5,6,7,8-Tetrahydro-3,5,5,6,8,8,-hexamethyl-2-naphthyl)ethan-1-one (AHTN) is listed in Annex III of EU Regulation 1223/2009 as a restricted substance. It may only be used under the conditions specified in the entry, including any maximum concentration, product type limitation and required warning statements shown above.

CAS 21145-77-7 - 1506-02-1 is the unique numerical identifier assigned to 1-(5,6,7,8-Tetrahydro-3,5,5,6,8,8,-hexamethyl-2-naphthyl)ethan-1-one (AHTN) by the Chemical Abstracts Service. In cosmetic compliance work, the CAS number is used to cross-reference the substance across regulatory databases, raw material specifications and safety assessment reports. Multiple EU annex entries may share the same CAS number if the same substance appears under different conditions or in different annexes.

The maximum concentration of (a) leave-on products: 0.1% except:hydroalcoholic products: 1% fine fragrance: 2.5%fragrance cream: 0.5% (b) rinse-off products: 0.2% applies to the concentration of the substance in the ready-to-use cosmetic product. When the substance is supplied as part of a blend or mixture, the calculation must account for the contribution of all sources in the formulation. The combined concentration must not exceed the stated limit.

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Source note for Annex III record 1-(5,6,7,8-Tetrahydro-3,5,5,6,8,8,-hexamethyl-2-naphthyl)ethan-1-one (AHTN)

This page summarizes one Annex III record for 1-(5,6,7,8-Tetrahydro-3,5,5,6,8,8,-hexamethyl-2-naphthyl)ethan-1-one (AHTN) from public European Commission cosmetic materials and adds linked inventory or identifier matches when available.

Use this record page to review Annex III conditions for 1-(5,6,7,8-Tetrahydro-3,5,5,6,8,8,-hexamethyl-2-naphthyl)ethan-1-one (AHTN), but confirm any final regulatory decision against the current official annex wording and source files.

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