Preservatives in homemade products may be a HUGE topic of debate with very, very strong opinions on either side, but let's make this simple: appropriate preservatives are MANDATED by the FDA.
When are preservatives necessary?
Labels for beauty products are regulated by the FDA; ingredients are required to be listed by their INCI code, but fragrances do not require anything more specific than "fragrance" on labels. Well, what's in them?
The short answer is that fragrance oils consist of aroma chemicals, essential oil parts, and essential oils.
First, full disclosure: