--- title: "Homosalate: a salicylate UVB filter" description: "Homosalate is a salicylate UVB filter used in sunscreen combinations. Learn its role and how to separate exposure findings from safety conclusions." --- # Homosalate: a salicylate UVB filter > Homosalate is a salicylate UVB filter used in sunscreen combinations. Learn its role and how to separate exposure findings from safety conclusions. Source: https://cosmetic-labs.com/glossary/homosalate Created: 2026-11-10T10:23:08+00:00 Modified: 2026-11-10T10:23:08+00:00 Author: Emilie SCHOL ## Definition of Homosalate: a salicylate UVB filter Homosalate is an organic salicylate UV filter used to absorb UVB in sunscreen formulas. It is commonly combined with other filters and cannot establish a product’s UVA protection or [SPF](https://cosmetic-labs.com/glossary/spf) on its own. ### Learn more ## What homosalate contributes Homosalate belongs to the salicylate family of organic UV filters. It is a relatively weak UVB absorber, so its role is best understood as part of a filter combination rather than a complete sun-protection system. Describing it as a salicylate identifies a chemical family. It does not make a homosalate sunscreen an exfoliating [salicylic acid](https://cosmetic-labs.com/glossary/salicylic-acid) treatment, and it does not establish that the product protects against UVA. ## Why a filter combination matters The protection of a sunscreen is a finished-formula property. A product can use homosalate alongside other UVB and UVA filters to support its intended protection profile, but the ingredient name alone does not establish that profile. Two products sharing this filter may have different labeled SPFs, directions and tested water resistance. Choosing between them requires the product label, not just the presence or absence of homosalate. ## Separating evidence from compliance Safety evidence and market compliance answer different questions. A proposal requesting additional safety information is not itself proof that a filter causes harm. Likewise, a scientific opinion is not permission to use an ingredient without checking the rules for the intended market. For product development, verify the current requirements for the complete sunscreen before selecting its filters, format and labeling. A glossary definition cannot replace that review. ## Interpreting endocrine and absorption questions A controlled trial in 48 healthy adults evaluated four sunscreen formulations containing six filters, including this ingredient. Products were applied to most of the body once on the first day and repeatedly on the next three days. The tested filters entered the bloodstream. That result documents systemic exposure under the studied conditions; it does not, on its own, demonstrate injury or establish the outcome of years of everyday use. The trial was not a comparison showing that one filter was the safest or most effective choice. Do not turn this exposure study into a conclusion about endocrine effects. It measured blood concentrations after specified application schedules, not the full range of possible outcomes in every user. Questions about long-term safety require evidence designed to answer them. ## Practical sunscreen selection Choose the finished sunscreen by its tested protection and directions, not by one familiar ingredient name. Broad-spectrum coverage addresses both UVA and UVB, whereas SPF mainly describes protection against sunburn. Reapply at least every two hours and follow the label after swimming or sweating. Shade, clothing and a hat remain useful alongside sunscreen. A filter name is not a promise that a product is waterproof, and no ingredient list removes the need to use enough product. If you prefer to avoid homosalate, compare the tested protection of the replacement rather than assuming that a different ingredient list provides equivalent UVA coverage. An ingredient preference should not leave exposed skin without a workable protection plan. Sources ## Sources and references References supporting this page are listed below. Source access dates and supported claims are recorded in the evidence notes where available. [Sunscreens and Photoaging: A Review of Current Literature](https://www.ebi.ac.uk/europepmc/webservices/rest/PMC8361399/fullTextXML) URL [https://www.ebi.ac.uk/europepmc/webservices/rest/PMC8361399/fullTextXML](https://www.ebi.ac.uk/europepmc/webservices/rest/PMC8361399/fullTextXML) [Questions and Answers: FDA’s regulatory actions on over-the-counter sunscreen | FDA](https://www.fda.gov/drugs/understanding-over-counter-medicines/questions-and-answers-fdas-regulatory-actions-over-counter-sunscreen) URL [https://www.fda.gov/drugs/understanding-over-counter-medicines/questions-and-answers-fdas-regulatory-actions-over-counter-sunscreen](https://www.fda.gov/drugs/understanding-over-counter-medicines/questions-and-answers-fdas-regulatory-actions-over-counter-sunscreen) [Sunscreen: How to Help Protect Your Skin from the Sun](https://www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun) URL [https://www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun](https://www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun) [Sunscreen: How to Help Protect Your Skin from the Sun](https://www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun) URL [https://www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun](https://www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun) [Systemic absorption trial, retrieved indexed abstract](https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=EXT_ID:31961417&format=json&resultType=core) URL [https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=EXT_ID:31961417&format=json&resultType=core](https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=EXT_ID:31961417&format=json&resultType=core) [Systemic absorption trial, retrieved indexed abstract](https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=EXT_ID:31961417&format=json&resultType=core) URL [https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=EXT_ID:31961417&format=json&resultType=core](https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=EXT_ID:31961417&format=json&resultType=core) [Systemic absorption trial, retrieved indexed abstract](https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=EXT_ID:31961417&format=json&resultType=core) URL [https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=EXT_ID:31961417&format=json&resultType=core](https://www.ebi.ac.uk/europepmc/webservices/rest/search?query=EXT_ID:31961417&format=json&resultType=core) [Finished sunscreen protection testing](https://www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun) URL [https://www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun](https://www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun) --- ## Site identity - Organization: Cosmetic Labs - Description: Cosmetic Labs is a directory and a platform to meet all your cosmetic product development needs. From sourcing raw material to finding the best CRO for your needs. - Website: https://cosmetic-labs.com