{"id":9416,"date":"2026-06-18T16:03:23","date_gmt":"2026-06-18T08:03:23","guid":{"rendered":"https:\/\/www.zleygroup.com\/?p=9416"},"modified":"2026-09-22T15:51:28","modified_gmt":"2026-09-22T07:51:28","slug":"agente-iluminador-de-alta-eficacia-para-la-correccion-de-manchas-y-la-uniformidad-del-tono-de-la-piel","status":"publish","type":"post","link":"https:\/\/www.zleygroup.com\/es\/high-efficacy-brightening-agent-for-spot-correction-even-tone\/","title":{"rendered":"4-Butylresorcinol (CAS 18979-61-8): Benefits & Formulation Notes"},"content":{"rendered":"
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4-Butylresorcinol (CAS 18979-61-8) for Brightening Formulations<\/h2>
\"ZLEY
<\/figcaption><\/figure>

ZLEY\u00ae BRC is a 4-Butylresorcinol ingredient for cosmetic formulators developing products for the appearance of uneven skin tone and dark spots. The correct CAS number is 18979-61-8<\/strong>. Confirm the identity and specification of the actual grade against its current COA and technical data sheet. For the listed grade, see the ZLEY\u00ae BRC 4-Butylresorcinol powder product page<\/a>.<\/p>

Ingredient at a glance<\/h3>
Art\u00edculo<\/th>Detail<\/th><\/tr>
Denominaci\u00f3n INCI<\/td>4-butilresorcinol<\/td><\/tr>
N\u00famero CAS<\/td>18979-61-8<\/td><\/tr>
F\u00f3rmula molecular<\/td>C10H14O2<\/td><\/tr>
Reference melting range<\/td>50\u201355\u00b0C; verify the specification for the supplied grade<\/td><\/tr>
Typical application<\/td>Cosmetic products designed to improve the appearance of uneven tone<\/td><\/tr><\/tbody><\/table>

The chemical identity is listed by PubChem<\/a>; the reference melting range is published by TCI<\/a>. These public references do not replace ZLEY\u00ae BRC’s batch documentation.<\/p>

What does the evidence show?<\/h3>

4-Butylresorcinol has been studied for its effects on tyrosinase and tyrosinase-related protein 1 (TRP-1), enzymes involved in melanin synthesis. A small randomized split-face study of a 0.1% cream reported improvement in melasma measures over eight weeks. Another clinical study reported visible improvement in age spots with a formula containing the ingredient. Results from those specific products should not be assumed for every formula, concentration or user.<\/p>

Read the 0.1% cream study<\/a> y el tyrosinase and age-spot study<\/a> for the study designs and limitations.<\/p>

Formulation and safety assessment<\/h3>

Select the use level for the intended product, market and target user through a documented formulation and safety assessment. Published studies at particular concentrations are not universal maximum-safe-use limits<\/strong>. Request the current TDS, SDS and COA before setting a specification or making a finished-product claim.<\/p>

Check dissolution, color, pH, packaging and compatibility in the complete formula under relevant storage conditions. Whether a chelator or antioxidant is useful depends on the full formula and stability results; neither EDTA disodium nor a fixed antioxidant dose should be treated as mandatory for every product.<\/p>

Questions for ZLEY\u00ae before a sample trial<\/h3>

Ask for the current grade specification, batch COA, TDS and SDS, then share your product format and target market with our team. We can discuss sample availability and documentation at services@zleygroup.com<\/a>. Run your own stability, compatibility, safety and claims assessments before launch.S 18979-61-8) for Brightening Formulations<\/p>

ZLEY\u00ae BRC is a 4-Butylresorcinol ingredient for cosmetic formulators developing products for the appearance of uneven skin tone and dark spots. The correct CAS number is 18979-61-8. Confirm the identity and specification of the actual grade against its current COA and technical data sheet<\/p>

Ingredient at a glan<\/p>

Item Detai<\/p>

INCI name 4-Butylresorcino<\/p>

CAS number 18979-61-<\/p>

Molecular formula C10H14O<\/p>

Reference melting range 50\u201355\u00b0C; verify the specification for the supplied grad<\/p>

Typical application Cosmetic products designed to improve the appearance of uneven ton<\/p>

The chemical identity is listed by PubChem; the reference melting range is published by TCI. These public references do not replace ZLEY\u00ae BRC’s batch documentation<\/p>

What does the evidence sho<\/p>

4-Butylresorcinol has been studied for its effects on tyrosinase and tyrosinase-related protein 1 (TRP-1), enzymes involved in melanin synthesis. A small randomized split-face study of a 0.1% cream reported improvement in melasma measures over eight weeks. Another clinical study reported visible improvement in age spots with a formula containing the ingredient. Results from those specific products should not be assumed for every formula, concentration or user<\/p>

Read the 0.1% cream study and the tyrosinase and age-spot study for the study designs and limitation<\/p>

Formulation and safety assessme<\/p>

Select the use level for the intended product, market and target user through a documented formulation and safety assessment. Published studies at particular concentrations are not universal maximum-safe-use limits. Request the current TDS, SDS and COA before setting a specification or making a finished-product claim<\/p>

Check dissolution, color, pH, packaging and compatibility in the complete formula under relevant storage conditions. Whether a chelator or antioxidant is useful depends on the full formula and stability results; neither EDTA disodium nor a fixed antioxidant dose should be treated as mandatory for every produc<\/p>

Questions for ZLEY\u00ae before a sample tri<\/p>

Ask for the current grade specification, batch COA, TDS and SDS, then share your product format and target market with our team. We can discuss sample availability and documentation at services@zleygroup.com. Run your own stability, compatibility, safety and claims assessments before launch.ealt..nts..w?.ee28llce.\ufffc<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

Explore 4-Butylresorcinol (CAS 18979-61-8) for brightening formulas: clinical evidence, formulation checks, safety assessment and ZLEY\u00ae BRC sourcing.<\/p>","protected":false},"author":1,"featured_media":9417,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[69],"tags":[],"class_list":["post-9416","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-active-ingredients"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.zleygroup.com\/es\/wp-json\/wp\/v2\/posts\/9416","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zleygroup.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zleygroup.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zleygroup.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zleygroup.com\/es\/wp-json\/wp\/v2\/comments?post=9416"}],"version-history":[{"count":0,"href":"https:\/\/www.zleygroup.com\/es\/wp-json\/wp\/v2\/posts\/9416\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zleygroup.com\/es\/wp-json\/wp\/v2\/media\/9417"}],"wp:attachment":[{"href":"https:\/\/www.zleygroup.com\/es\/wp-json\/wp\/v2\/media?parent=9416"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zleygroup.com\/es\/wp-json\/wp\/v2\/categories?post=9416"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zleygroup.com\/es\/wp-json\/wp\/v2\/tags?post=9416"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}