from gov.uk
All cosmetic products supplied in the UK, whether for consumer or professional use, must comply with European Cosmetics Regulation 1223/2009, which came into force on 11 July 2013. It also requires safety assessments on the products, as listed in Annex I. The regulation requires you to notify the European Commission of every product, using the Cosmetic Product Notification Portal (CPNP).
https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02009R1223-20160812&from=EN
Article 2 definitions
(a) ‘cosmetic product’ means any substance or mixture intended to be placed in contact with the external parts of the human body (epidermis, hair system, nails, lips and external genital organs) or with the teeth and the mucous membranes of the oral cavity with a view exclusively or mainly to cleaning them, perfuming them, changing their appearance, protecting them, keeping them in good condition or correcting body odours;
(b) ‘substance’ means a chemical element and its compounds in the natural state or obtained by any manufacturing process, including any additive necessary to preserve its stability and any impurity deriving from the process used but excluding any solvent which may be separated without affecting the stability of the substance or changing its composition;
(c) ‘mixture’ means a mixture or solution composed of two or more substances;
(d) ‘manufacturer’ means any natural or legal person who manufactures a cosmetic product or has such a product designed or manufactured, and markets that cosmetic product under his name or trademark;
(e) ‘distributor’ means any natural or legal person in the supply chain, other than the manufacturer or the importer, who makes a cosmetic product available on the Community market;
(f) ‘end user’ means either a consumer or professional using the cosmetic product;
(g) ‘making available on the market’ means any supply of a cosmetic product for distribution, consumption or use on the Community market in the course of a commercial activity, whether in return for payment or free of charge;
(h) ‘placing on the market’ means the first making available of a cosmetic product on the Community market;
(i) ‘importer’ means any natural or legal person established within the Community, who places a cosmetic product from a third country on the Community market;