Ultramarines represent a group of synthetic inorganic pigments prized for their ability to provide deep blue, violet, and pink hues in cosmetic formulations. These minerals act as stable, non-bleeding colorants and are frequently utilized in color-correcting skincare to neutralize unwanted warmth or sallowness in the complexion.
- INCI Name:
- Ultramarines
- Chemical/Scientific Name:
- Sodium Aluminum Sulfosilicate
- Common Aliases:
- CI 77007, Pigment Blue 29, Lazurite (natural mineral equivalent)
| Category: | Colors |
| Source Origin: | Synthetic (Mineral-derived structure) |
| Comedogenic Rating: | 0 |
| Primary Industries: | Color Cosmetics, Personal Care, Skincare |
| Solubility: | Insoluble (Dispersible in oil and water) |
At a Glance: Properties & Effects
| Brightening/Tone: | |
| Formula Stability: | |
| Irritation Risk: | |
| Comedogenicity: |
- Primary Benefits: High color purity, excellent lightfastness, non-migrating properties in multi-layered formulations, and effective neutralization of yellow/orange skin tones.
- Potential Risks: Sensitivity to acidic environments (pH below 4.5) and specific regulatory restrictions for lip-area applications in the United States.
Biological Action & Cosmetic Profile
Chemically classified as complex sodium aluminum silicates containing sulfur, these pigments function through the entrapment of sulfur radical ions within a sodalite crystal lattice. This specific structure dictates the visible light absorption and subsequent color reflection, with the blue variant being the most ubiquitous. Unlike organic dyes, these minerals do not penetrate the stratum corneum; instead, they reside on the skin surface as part of the decorative or corrective layer, providing high opacity and a matte finish.
Optical performance is a hallmark of this ingredient class, particularly in “brightening” primers and CC creams. By reflecting blue light, they utilize the principles of color theory to counteract the appearance of hyperpigmentation or natural yellowing associated with aging. Because they are inorganic and highly stable, they do not “bleed” or smudge between different phases of an emulsion, making them a preferred choice for intricate makeup designs and high-definition formulations.
Stability in alkaline environments makes these pigments a staple in the cold-process soap industry. However, formulators must exercise caution when incorporating them into low-pH systems. Exposure to acidic conditions can trigger a chemical decomposition that releases hydrogen sulfide gas, resulting in a distinct “rotten egg” odor and the loss of pigment color.
Broader Applications & Origins
Historical versions were once laboriously extracted from the semi-precious stone Lapis Lazuli. Modern cosmetic science relies exclusively on the synthetic production of these minerals to ensure absolute purity and the removal of heavy metal contaminants. The manufacturing process involves heating Kaolin, soda ash, sulfur, and charcoal in a controlled furnace environment to achieve the desired oxidation state and hue.
Beyond facial cosmetics, these pigments are found in hair care to tone brassiness in blonde or silver hair. Their inert nature also allows for inclusion in mineral-based sunscreens alongside Titanium Dioxide or Zinc Oxide to help adjust the “white cast” often associated with physical UV filters.
Routine Integration
- Synergies: High compatibility with Mica for pearlescent finishes, Titanium Dioxide for increased opacity, and Iron Oxides for creating custom flesh tones or violet shades.
- Conflicts: Use caution when layering with highly acidic serums containing Ascorbic Acid, Glycolic Acid, or Lactic Acid, as direct contact with low-pH liquids can degrade the pigment.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel and the European Scientific Committee on Consumer Safety (SCCS) recognize these pigments as safe for use in cosmetics. While the EU permits their use in all categories, the US FDA restricts Ultramarines from use in lip products due to concerns regarding sulfur release in the acidic environment of the mouth. They are widely regarded as non-sensitizing and non-comedogenic, making them suitable for sensitive and acne-prone skin types.
Are Ultramarines natural or synthetic?
While they mimic the mineral lazurite found in nature, all cosmetic-grade versions are produced synthetically to ensure safety, consistency, and the absence of impurities like lead or arsenic.
Why are some blue eyeshadows containing Ultramarines not recommended for lips?
In the United States, the FDA has not approved this pigment for use in the “area of the lips” because the pigment can react with the moisture and acidity of the mouth to release trace amounts of hydrogen sulfide gas.
Do these pigments cause breakouts?
No, these are inorganic minerals that are chemically inert on the skin surface and possess a comedogenic rating of zero, meaning they do not clog pores.