Octisalate (Ethylhexyl Salicylate)
A gentle UVB filter and solvent found in most chemical sunscreens — mild, but a salicylate worth noting
INCIEthylhexyl Salicylate
- Category
- Sunscreen / UV Filter
- Risk level
- low
- What it covers
- UVB (~295–315 nm) — no UVA protection, so always combined with other filters
- Second job
- Also a solvent that helps dissolve and spread other UV filters (e.g. avobenzone) in the formula
- Relative risk
- One of the gentler chemical filters — low sensitisation, no white cast
- Salicylate
- A salicylate ester — patch test if you have severe aspirin/salicylate allergy
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This ingredient may appear under any of these names:
Commonly found in
Possible reactions
- Contact dermatitis (uncommon) at the application site
- Stinging on sensitised or broken skin
- Redness/itching in eczema-prone individuals
- Rare photoallergic reaction
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What is octisalate?
Octisalate (INCI: Ethylhexyl Salicylate; also Octyl Salicylate) is a chemical UV filter that absorbs UVB (≈295–315 nm). It belongs to the salicylate ester family and is one of the gentler chemical filters approved worldwide. It doesn't cover UVA, so it's always used alongside other filters (avobenzone, octocrylene, homosalate) to broaden the spectrum.
Octisalate has a useful second role: it's a solvent that helps dissolve and evenly spread other oil-soluble UV filters (notably avobenzone) across the skin. That dual function — UVB filter plus formulation solvent — is why it turns up not only in dedicated sunscreens but also in SPF moisturisers, tinted products, foundations, and SPF lip balms.
Why (and when) it causes reactions
Octisalate is a low-severity sensitiser with a good skin feel and no white cast, which is why formulators like it. Reactions are uncommon and, when they happen, follow the usual contact (or, rarely, photoallergic) dermatitis pathway. Higher-risk situations:
- Salicylate sensitivity — as a salicylate ester (like homosalate), it can cross-react in people sensitive to aspirin/salicylates.
- Eczema / compromised barrier — broken skin absorbs more, raising exposure.
- Cumulative exposure — it appears across many layered products (moisturiser + SPF + makeup), adding up over a day.
One practical note: because octisalate often co-occurs with fragrance and other filters, isolating it as the culprit can be hard — checking the full ingredient list (not the marketing) is the way to do it.
How to use it well
- Confirm a UVA filter is present — octisalate is UVB-only.
- Patch test if you have salicylate/aspirin sensitivity (and check for homosalate too).
- Choose mineral or European-filter sunscreens if you react to salicylate filters.
- Reapply every 2–3 hours, apply generously.
Alternatives
- Salicylate allergy / sensitive skin: mineral sunscreens (zinc oxide, titanium dioxide).
- Elegant, low-allergy chemical (EU/Asia): Tinosorb S/M, Mexoryl, Uvinul.
- Avoid the salicylate family entirely: formulas built on avobenzone + octocrylene + titanium dioxide, with no homosalate/octisalate.
The bottom line
Octisalate is a gentle, dual-purpose UVB filter-and-solvent found in a huge share of chemical sunscreens — low-allergy for most people. The main flag is the salicylate link: if you're seriously aspirin/salicylate-sensitive, patch test or switch to a mineral or newer-filter sunscreen (and remember it often travels with homosalate).
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