Science
Mechanism of Action
This compound functions as a colorant or pigment, imparting a black hue. Its action involves dispersion within liquid mediums like inks and coatings, or binding to material fibers, such as those in textiles.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
No data pertaining to dusting properties was found in the research for Solvent Black 5.
The Formula
Formulation
Stability
Solvent Black 5 is characterized by its insolubility in water and significant solubility in organic solvents, including ethanol, benzene, toluene, oleic acid, and stearic acid. It exhibits robust stability across a broad pH range, with reported values for the dye or product types of Nigrosine varying from 3.5-7.5. It demonstrates excellent alkali resistance and good acid resistance, along with thermal stability up to at least 150°C to 180°C.
Safety
Safety Profile
Solvent Black 5 (C.I. 50415) does not possess individual FDA approval as a standalone chemical, though it may be present as a component within products covered by broader group standards. Crucially, no specific safety assessments from organizations like the Cosmetic Ingredient Review (CIR) or the Scientific Committee on Consumer Safety (SCCS) are available for its use at cosmetic concentrations. Industrial handling information provides warnings such as 'Harmful: danger of serious damage to health by prolonged exposure through inhalation, and in contact with skin and if swallowed,' and notes the emission of irritating vapors upon thermal decomposition. Reports also indicate potential toxicity to human health and the environment, leading to regulation in certain countries.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to the absence of specific cosmetic safety assessments and the presence of industrial hazard warnings, the use of Solvent Black 5 in precision skincare is highly questionable and warrants caution, classified as insufficient-data.
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