T-Butyl Naphthoxazoledione
A cosmetic ingredient used as skin conditioning - emollient, nail conditioning, skin protecting in skincare, haircare, and personal-care products sold in the European Union.
What is it?
t-Butyl Naphthoxazoledione is the organic compound.
What does it do?
T-Butyl Naphthoxazoledione is listed in the EU cosmetic ingredient inventory with the following declared functions:
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Skin conditioning - emollient
softens the skin by reducing roughness and friction between skin cells
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Nail conditioning
improves the appearance, feel, or condition of fingernails and toenails
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Skin protecting
helps shield skin from external environmental factors
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Uv filter
absorbs or reflects ultraviolet radiation, the active ingredient class in sunscreens
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Skin conditioning - miscellaneous
improves skin condition through mechanisms not classified under the more specific emollient or humectant subcategories
EU regulatory status
T-Butyl Naphthoxazoledione is allowed for use in cosmetic products in the European Union under Regulation 1223/2009. It is not subject to a specific Annex restriction at the time of writing.
Frequently asked questions
What is T-Butyl Naphthoxazoledione?
T-Butyl Naphthoxazoledione is a cosmetic ingredient catalogued in the EU CosIng database. t-Butyl Naphthoxazoledione is the organic compound.
Is T-Butyl Naphthoxazoledione allowed in cosmetics in the EU?
Yes. T-Butyl Naphthoxazoledione is allowed for use in cosmetic products in the EU under Regulation 1223/2009.
What does T-Butyl Naphthoxazoledione do in cosmetic products?
T-Butyl Naphthoxazoledione is declared in the EU cosmetic ingredient inventory with these functions: skin conditioning - emollient, nail conditioning, skin protecting, uv filter, skin conditioning - miscellaneous.
What is the CAS number of T-Butyl Naphthoxazoledione?
The CAS (Chemical Abstracts Service) number for T-Butyl Naphthoxazoledione is 1800479-58-6.
Related ingredients
Source: EU CosIng database (European Commission). This page is derived from public-sector information published by the European Commission. · Last updated: 28/05/2026