Science
Mechanism of Action
CI 77289 exerts its effect as a cosmetic colorant by physically reflecting green light, thereby delivering a vibrant green color to formulations. This optical property allows it to visually neutralize contrasting red tones on the skin, contributing to a more even complexion when incorporated into corrective products.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This inorganic pigment is oil-soluble and exhibits optimal stability within a pH range of 5.0 to 6.0. It demonstrates robust stability at room temperature, resisting degradation from light, heat, and oxidation. Storage in a cool environment away from direct sunlight is recommended. Elevated temperatures may induce a minor reversion (less than 0.1%) to hexavalent chromium.
Conflicts
- Citric Acid (due to chemical reactions)
- Molten alkali at high temperatures under oxidizing conditions
- Lithium
- Nitroalkanes
- Oxygen difluoride and other strong oxidizers
- Chlorine trifluoride (produces flame)
- Glycerol (may produce explosion with chromic oxide)
- Water and moisture (conditions to avoid for dry powder)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deferred its own evaluation, acknowledging the FDA's assessment of Chromium Hydroxide Green as an approved color additive for externally applied cosmetics, including around the eye. It is not permitted in lip products in the US. Regulatory bodies like the FDA and EU Cosmetics Directive ensure stringent control over heavy metal levels and require the absence of chromate ions for safe use. Maximum concentrations are consistent with good manufacturing practices and established regulatory limits.
Your Skin
Skin Compatibility
Our Assessment
Verdict
CI 77289 is a well-regulated inorganic green pigment valuable for its aesthetic contribution and ability to optically counteract redness in cosmetic formulations.
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