Science
Mechanism of Action
This ingredient functions by absorbing light, which produces a profound black hue within products. Beyond its role as a primary cosmetic colorant, CI 77268:1 acts as an opacifying agent, contributing to improved coverage and texture in various formulations. Its high light absorption properties are particularly effective in matte makeup, yielding a non-reflective finish. In specialized applications like permanent makeup, its fine particle size contributes to the longevity and vibrancy of the color.
Research
Clinical Evidence
High confidence2%
Key findings
- 01 Typical usage levels for makeup products, oily emulsions, and soaps range from 2% to 5%.
- 02 As a black colored pigment in formulations, approximately 2% is a common and generally well-tolerated concentration.
- 03 For natural colorant applications, such as specialized pigment dispersions, recommended usage can extend from 1% to 50%.
- 04 Concentrations exceeding 10% may be employed when specific performance properties like UV and thermal conductivity, increased tensile strength, or rheology control are desired, although these higher levels might introduce formulation complexities.
- 05 A formulation for a simple PM moisturizer designed for dry skin was observed to contain 0.0001%.
Transparency
Dusting Analysis
Inhalation risks are specifically associated with powdered forms of CI 77268:1, particularly airborne, unbound particles of respirable size. The International Agency for Research on Cancer (IARC) classifies carbon black as a possible human carcinogen (Group 2B) under these conditions. Consequently, cosmetic-grade CI 77268:1 is typically incorporated into solid or liquid formulations to minimize the generation of airborne particles and ensure safe use.
The Formula
Formulation
Stability
CI 77268:1 is generally insoluble in water, though specially treated variants can achieve water solubility. It exhibits dispersibility in oil. Formulators should note its capacity to adsorb moisture and chemical vapors, which necessitates careful consideration for product packaging and stability.
Conflicts
- Strong oxidizers
Safety
Safety Profile
Cosmetic-grade CI 77268:1, produced with high purity, is considered safe for use in cosmetics under specified restrictions. Low-quality carbon black may present sensitizing and carcinogenic risks. While generally well-tolerated, a patch test is highly recommended for individuals with sensitive skin. Inhalation risks are mitigated by typically formulating it into solid or liquid products. The EC Cosmetics Regulation (EC No. 1223/2009) Annex IV specifies permitted application areas and maximum concentrations, ensuring its safety within these guidelines.
Your Skin
Skin Compatibility
Our Assessment
Verdict
CI 77268:1 is a valuable cosmetic colorant, providing intense black pigmentation and opacifying properties, safely utilized across numerous formulations when produced to high purity standards and handled to avoid inhalation of powdered forms.
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