Spf

Homosalate

Chemical UVB filter of the salicylate class — fat-soluble, effective against UVB and weakly against UVA-II. One of the most common filters in American sunscreens due to its ability to dissolve other filters and improve texture.

UVB filtersalicylatefilter solventchemical SPF

✓ Safe

Comedogenic Rating

0/5

Irritation Potential

0/5

What is it?

Homosalate (3,3,5-trimethylcyclohexyl salicylate) — ester of salicylic acid and 3,3,5-trimethylcyclohexanol. Molecular weight ~262 Da. Colorless liquid with a light odor. Fat-soluble. UVB spectrum: 295–315 nm, peak ~306 nm. Maximum allowed concentration: USA — 15%, EU — 10%. New SCCS review (EU, 2022): recommended reduction to 7.34% due to potential hormonal effects in animal studies at very high doses. Popular in the USA as one of the few filters approved by the FDA still in the classic regulatory list. Liquid state → effective solvent for solid filters (avobenzone, octisalate).

American sunscreens and day creams with SPF, water-resistant SPF for body and sports, SPF primers and makeup bases.

Key Benefits

✦

Effective UVB protection across a wide range

Homosalate actively absorbs UVB in the range of 295–315 nm — the most dangerous for DNA damage and the development of sunburns. At a concentration of 10–15%, it provides SPF 6–12 on its own. Most often used as part of multi-filter systems together with avobenzone (UVA-I), octisalate (UVB), and octocrylene (UVB+stabilization) for broad-spectrum SPF 30–50+.

◈

Solvent for solid and crystalline UV filters

The liquid state of homosalate at room temperature makes it an effective solvent for solid filters, particularly avobenzone (solid crystalline). Comonomers of the type homosalate + avobenzone form a homogeneous transparent system without crystallization — critical for stable SPF formulations. It also reduces the overall viscosity of the SPF oil phase, improving the texture of the final product.

✧

Reduction of greasiness sensation in SPF formulations

Homosalate is a relatively light ester — it does not give the heavy greasy feel characteristic of some other fat-soluble filters. In combination with octisalate (also a salicylate), it forms a "dry-feel SPF oil phase" — a base for lightweight sunscreen fluids and sprays with an invisible texture. Popular in American dermatological brands (EltaMD, Neutrogena) precisely for its light dry finish.

Suitable for

all skin typeschemical SPF formulationsdaily protection

Main Actions

✓ UVB filter (295–315 nm)✓ solvent for solid filters✓ light SPF texture

Homosalate and the regulatory situation in the EU

In 2022, the SCCS (Scientific Committee on Consumer Safety, EU) published an Opinion recommending to lower the maximum concentration of homosalate from 10% to 7.34% due to potential endocrine activity in rat studies at doses significantly higher than cosmetic use. This recommendation has not yet become mandatory regulation. At allowed concentrations, the risk is considered minimal for most consumers. For those concerned — mineral SPFs (zinc oxide, titanium dioxide) are an alternative without regulatory issues.

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