Fecha de publicación: 29/12/2022 Fuente: WIPO (eseential oils OR extracts) The present invention relates to a process for preparing highly concentrated, purified methyl thujate, whose chemical name is 5,5-dimethylcyclohepta-1,3,5-triene-1-carboxylate methyl, which is developed by means of low-temperature crystallisation of essential oils of the Thuja species, particularly Western Red Cedar oil, use as a fragrance of the purified methyl thujate with high purity thus obtained, having a purity of more than 85%, a fragrance composition that uses said purified methyl thujate and the different uses thereof. The present invention has the main advantage of achieving positive and long-lasting olfactory effects, as well as eliminating molecules responsible for bad odours and the ability to be used in higher concentrations in fragrances than the essential oil from which the methyl thujate is isolated.