Composed of a single proton and a single electron, hydrogen is the simplest and most abundant element in the universe. It is estimated that 90% of the visible universe is composed of hydrogen. Hydrogen is the raw fuel that most stars 'burn' to produce energy. The same process, known as fusion, is being studied as a possible power source for use on earth. The sun's supply of hydrogen is expected to last another 5 billion years. Hydrogen is a commercially important element.
Eau de toilette is a lightly scented cologne used as a skin freshener. The term toilette/toilet used in this context describes the process of washing and personal grooming. Eau de toilette is also referred to as aromatic waters and has a high alcohol content.
To put it simply, Perfume, Eau de Parfum, Eau de Toilette, and Cologne are different in their concentrations of fragrance oils, but thatâs not all! See an example of Eau de Toilette: Polo Blue by Ralph Lauren Eau De Toilette. See an example of Eau De Perfume: Emporio Armani By Giorgio Armani Eau De Perfume.