ZLEY® BRC (4-Butylresorcinol; CAS 18979-61-8) is a powder ingredient for cosmetic formulations designed to improve the appearance of uneven skin tone. Review the current batch COA and TDS for grade-specific identity, purity and handling information. Finished-product performance and suitable use level depend on the complete formula and its safety and stability assessment.

For a closer look at the ingredient’s published research and practical formulation checks, read our 4-Butylresorcinol formulation guide. Request a sample and current technical documents from ZLEY® before qualifying a grade.