Avobenzone (CAS NO:70356-09-1)

Avobenzone is a broad-spectrum UVA filter that protects against UVA rays, which are primarily responsible for skin aging and photo-damage. It’s effective in long-wavelength UVA protection (up to 400 nm), making it an essential component in sunscreen formulations.

Avobenzone tends to degrade upon UV exposure unless stabilized. It is commonly combined with Octocrylene or Tinosorb S to enhance photostability and maintain consistent UV protection throughout product use.

Avobenzone can be used at up to 10% concentration in the EU, 5% in Japan, and 3% in the USA, depending on regional regulations and formulation requirements.

Avobenzone requires stabilization due to its tendency to degrade under sunlight. It is commonly stabilized with Octocrylene or Tinosorb S, ensuring enhanced photostability and longer-lasting sun protection in the final product.

Octocrylene absorbs UV radiation and prevents Avobenzone from breaking down by acting as a photostabilizer, thus maintaining the molecular integrity of Avobenzone and ensuring consistent UVA protection during sun exposure.

Avobenzone is oil-soluble, making it difficult to incorporate into water-based formulations without emulsifiers. It is typically formulated in O/W emulsions using suitable emulsifiers to ensure uniform dispersion and product stability.