Fragrance oil quality can be altered from prolonged exposure to light. It is best to store fragrance oils, especially those that will not be immediately used, in a cool, dark location. For prolonged storage, we recommend keeping fragrance oils in amber glass containers to minimize the potential for damage to the fragrance oil composition. Fragrance oils stored in plastic bottles over longer periods of time can slowly dissolve the plastic, absorbing it into the fragrance oil and possibly jeopardizing the integrity of the fragrance oil.
Be sure that lids are fastened tightly when storing fragrance oils to minimize exposure to oxygen. When fragrance oils experience a prolonged exposure to oxygen, it can lead to a process known as oxidization. Oxidization is the process where oxygen exposure can alter the chemical substance of the fragrance oils.