Octinoxate is sunscreen for your perfume, not a scent material. This colourless, low-viscosity liquid absorbs UVB radiation (280–320 nm) before it can break down fragrance molecules. At typical use levels, it contributes no detectable odour to a composition. Use Octinoxate wherever UV-sensitive ingredients need shielding — citrus oils, aldehydes, and terpenes are the first casualties of light exposure. It's miscible with most fragrance oils and doubles as a co-solvent, dissolving other oil-soluble additives with ease. Simply stir it into your oil phase. One critical caveat: Octinoxate and Avobenzone destabilise each other under UV light unless a photostabiliser is also present. Add Oxynex ST at just 0.5% to quench this reaction and protect both filters. For UVB-only protection, pair Octinoxate with 2-Ethylhexyl Salicylate instead. Octinoxate vs Avobenzone Octinoxate and Avobenzone protect against different portions of the UV spectrum. Octinoxate absorbs UVB (280–320 nm) — the shorter-wavelength radiation that degrades terpenes, aldehydes, and other volatile components. Avobenzone absorbs UVA (320–400 nm) — the longer-wavelength light responsible for yellowing liquids and breaking down vanillin. Octinoxate is a pourable liquid that incorporates instantly; Avobenzone is a crystalline powder requiring heat (80–85°C) and a co-solvent to dissolve. Octinoxate itself can dissolve up to 26% Avobenzone by weight, making it a useful carrier for the powder. However, the two destabilise each other through photocyclisation unless a photostabiliser like Oxynex ST is included as a third ingredient. With Oxynex ST present (just 0.5% of the finished formula), the combination provides excellent broad-spectrum UV protection for your fragrances.
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