Dilution of Iso E Super and Hedione in Alcohol

Regarding your question about diluting fixatives like Iso E Super and Hedione in alcohol before adding them to your fragrance formula (40% alcohol + 5% fixative + 5% water + perfume), here is the information:

• Do you need to dilute?
  Iso E Super and Hedione are typically liquid aroma chemicals that are soluble in alcohol. While you can often add them directly to your alcohol base, diluting them beforehand is a common practice in perfumery, especially for ease of handling, measuring small quantities accurately, and ensuring smooth integration into the fragrance concentrate.

• Recommended Dilution Percentage:
  If you choose to dilute them, a common practice is to create a 10% or 20% dilution in ethanol. This involves mixing 10-20% of the aroma chemical with 80-90% ethanol. This makes them less concentrated and easier to work with when formulating.

In summary, while not strictly necessary for solubility with Iso E Super and Hedione due to their liquid nature and alcohol solubility, pre-dilution is a helpful technique for precision and ease of blending. A 10% or 20% dilution is generally recommended if you choose this approach.