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In cosmetic formulas, 4-Chlororesorcinol changes hair colour.

4-Chlororesorcinol
Recorded formula roles, not a prediction of a finished product’s results.
About the sources4-Chlororesorcinol changes hair colour.
The listed functions explain its role in a formula. They do not establish whether a finished product will suit your skin.
No reviewed benefit claim is available here yet. Compare the complete formula, its directions, and your own skin preferences.
What a CosIng listing meansIngredient function, formulation and safety background from cosmetic-science publishers. Industry affiliation is disclosed below.
Cosmetic Ingredient Review (CIR)
Industry-funded cosmetic ingredient safety review; not government approval.
JACT 15(4):284-294, 1996
Published Report. Exact ingredient names checked in the report; group assessments can include read-across from related ingredients. Not a benefit claim or an independent clinical review.
Cosmetic Ingredient Review (CIR)
Industry-funded cosmetic ingredient safety review; not government approval.
IJT 36(Suppl2):14-58, 2017
Published Re-review Not Opened. Exact ingredient names checked in the report; group assessments can include read-across from related ingredients. Not a benefit claim or an independent clinical review.
Related papers naming this ingredient or a sourced alternative name in metadata or available article text. Laboratory, clinical and exposure studies have different scopes; these links are not reviewed benefit claims.
The Analyst · 2001
PubMed is hosted by the U.S. National Library of Medicine. Listing there does not mean NIH authored or endorses a paper.
Industry ingredient directory · matched to the publisher’s ingredient index.
Catalog reference 31526. Database inclusion is not approval or proof of safety or effectiveness.
Related ingredients, common formula neighbors, naming, and catalog context. This stays separate from evidence and personal-fit guidance.
Real brands and product categories from the 14 decoded products listing 4-Chlororesorcinol — an observation of our catalog, not a claim about market share.
14 of 7,133 decoded products list this ingredient. Count calculated on (UTC). Counts describe our recorded labels, which may differ from current packaging; the public product list can be smaller than the decoded catalog.
How we collect ingredient listsBrands
Product categories
others (9)
9 public products list this ingredient.
Ingredient lists show presence and order, not concentration, pH, ingredient grade, delivery system, or finished-formula performance.
Sources & methodologyCompiled from the EU CosIng database (ref 31526) · snapshot 16 June 2026. CosIng is an informational, non-legally-binding reference. Inclusion does not mean an ingredient is approved, safe, authorized for cosmetic use, or clinically effective. An INCI list does not reveal concentration, pH, ingredient grade, delivery system, or finished-formula performance.