Dodecalactone delta is very useful in dairy products, but also in fruit flavors such as peach and apricot. At slightly lower dosages also in red fruit flavors.
In perfumes, dodecalactone delta is mainly used to soften harsh metallic notes in floral and fruity fragrances. It can also be used to bring some "milky" effects to perfumes.
Dosage in flavour could be up to 20 ppm in finished consumer product.
Dosage in fragrances could be up to 10%.