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Octisalate

Also known as: Octyl salicylate, Ethylhexyl salicylate, 2-Ethylhexyl salicylate

An oil-soluble UVB filter that supports sunscreen formulas but does not provide broad-spectrum protection by itself.

Amber sunscreen-filter liquid, glass dish, and cream swatch in sunlight
Editorial illustration

Octisalate is an oil-soluble organic UV filter used mainly to absorb UVB and help dissolve other sunscreen actives. U.S. monograph conditions list it up to 5%. A maximal-use trial detected systemic absorption, but detection alone does not establish harm; FDA has requested additional safety data rather than advising people to stop using sunscreen.2, 3, 4

  • Primarily a UVB absorber1, 2
  • Helps solubilize some other filters1, 2
  • Listed up to 5% in U.S. monograph conditions1, 2
  • Not broad-spectrum when used alone1, 2

What is Octisalate?

Octisalate is the common sunscreen name for ethylhexyl salicylate. Its oily character improves the feel and active-solvent phase of some formulas while contributing mostly UVB absorption.1, 2

Where it comes from

Natural sources

  • Not a naturally extracted sunscreen active

How it's made

Manufactured by esterifying salicylic acid with 2-ethylhexanol and purified for sunscreen use.

What it does in products

  • UVB filter
  • Oil-phase solvent
  • Sunscreen emolliency

Benefits

UVB contribution

strong evidence

Octisalate can contribute to tested SPF as one component of a multi-filter sunscreen.2

The regulatory monograph recognizes the active, but only the finished product's standardized testing establishes its SPF.

Formula support

moderate evidence

Its oil solubility can help dissolve and distribute other oil-phase UV filters.1, 2

This is a formulation function rather than an independent health benefit.

Broad-spectrum protection alone

insufficient evidence

Octisalate does not cover enough UVA to qualify as a complete broad-spectrum system by itself.2

Protection depends on the other filters and verified finished-product testing.

Evidence scope and limitations

Topical octisalate in finished sunscreen is covered; oral salicylates and occupational raw-material exposure are outside scope.

  • Systemic detection studies do not measure long-term clinical harm.
  • Finished formulas combine filters, so ingredient-only performance cannot predict SPF or UVA protection.

Evidence last checked: 2026-09-28

Side effects & safety

Eye stinging (uncommon)Often reflects migration of the full sunscreen formula.
Irritation or allergy (rare)Possible with UV filters or other formula components.

Safety considerations

  • No established drug interactions from compliant topical use
  • Not for: Known allergy to octisalate or the finished sunscreen
  • Not for: Using octisalate alone as sun protection
4, 3

Amounts studied & product use

These figures describe research or common product use, not a personal dose or treatment recommendation.

In skincare studies and products

U.S. OTC monograph M020 lists octisalate up to 5%. Consumers should use a tested broad-spectrum sunscreen rather than calculate protection from the ingredient list.

2

Regulatory status

  • Included in U.S. OTC sunscreen monograph M020 up to 5%; FDA's newer safety review has requested additional data for a final positive GRASE determination.
  • INCI name on cosmetic labels: Ethylhexyl Salicylate.
2, 3

Absorbed does not automatically mean unsafe

The maximal-use trial was designed to determine whether additional systemic safety testing was needed. Crossing a detection threshold is not the same as demonstrating clinical harm, and FDA continues to emphasize sunscreen use alongside shade and clothing.

4, 3

Frequently asked questions

Is octisalate a salicylate?

Yes. It is an ester of salicylic acid, but topical sunscreen exposure is not equivalent to taking aspirin.2, 3, 4

Does octisalate protect against UVA?

Its contribution is mainly UVB; broad-spectrum formulas pair it with other filters.2, 3, 4

Should absorption findings make me stop sunscreen?

FDA has said absorption data identify research needs, not that people should stop using sunscreen.2, 3, 4

The bottom line

Octisalate is a supporting UVB filter. Judge it inside a tested broad-spectrum formula, not as an isolated molecule or an absorption headline.

References

  1. Octisalate: compound summary. PubChem, National Library of Medicine (2026) · ingredient monograph · CID 8364
  2. OTC Monograph M020: Sunscreen Drug Products for Over-the-Counter Human Use. U.S. Food and Drug Administration (2021) · government guidance · OTC Monograph M020
  3. Questions and Answers: FDA regulatory actions on over-the-counter sunscreen. U.S. Food and Drug Administration (2026) · government guidance
  4. Effect of sunscreen application on plasma concentration of sunscreen active ingredients: a randomized clinical trial. JAMA (2020) · randomized trial · PMID 31961417

Revision history

  1. Initial publication with claim-level citations, formulation limits, safety context, and editorial evidence review.