Science
Mechanism of Action
As a colorant, Disperse Brown 1 functions by absorbing into fibers or surfaces to impart color. On skin, it does not offer any beneficial mechanism of action; instead, its interaction with the skin is associated with allergic reactions and irritation.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
Information regarding 'dusting' properties of Disperse Brown 1 in cosmetic formulations is not available in the provided research data.
The Formula
Formulation
Stability
For optimal stability and color depth in dyeing applications, Disperse Brown 1 is ideally used within a pH range of 3-8, with a safer range often cited as 4-5. Elevated pH levels above 6 can induce hydrolysis, potentially leading to a reduction in color intensity.
Conflicts
- Alkaline conditions (pH > 6) due to risk of hydrolysis and color degradation.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has not conducted a safety assessment for Disperse Brown 1. A predecessor to the SCCS, the SCCNFP, concluded in 2004 that its use in hair dyes could not be deemed safe due to insufficient safety data. GHS classification indicates it is harmful if swallowed (80% of reports), causes serious eye damage (80% of reports), and may induce allergic skin reactions (20% of reports). It is identified as a California Safe Cosmetics Program (CSCP) Reportable Ingredient due to concerns regarding bioaccumulation and environmental persistence.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Disperse Brown 1 should be avoided in skincare due to its classification as a strong contact allergen and irritant, coupled with a lack of any demonstrated beneficial mechanisms for skin.
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