Description

Ultramarines CAS NO 11118-33-5 are a class of complex, synthetic inorganic pigments renowned for their vibrant and stable blue to violet hues. Their primary value lies in their exceptional lightfastness, heat stability, and chemical inertness, making them superior to many organic colorants. This product is essential for manufacturers in the plastics, coatings, cosmetics, and construction industries seeking durable, non-toxic coloration for their materials.

Application

• Coloration of plastics and masterbatches, including polyolefins, PVC, and engineering polymers.
• Pigment for high-performance industrial and architectural paints and coatings.
• Colorant for printing inks, providing excellent opacity and weatherability.
• Cosmetic-grade pigment in eye shadows, lipsticks, and soaps (subject to specific purity grades).
• Coloring agent for construction materials like concrete, mortar, and roofing tiles.
• Use in paper coating and specialty paper production.
• Coloration of artists' colors and other specialty artistic materials.
• Potential use as a whitening agent or color corrector in detergents and laundry applications.

Basic Information

Product Name	Ultramarines
CAS No.	11118-33-5
Molecular Formula	Na6-8Al6Si6O24S2-4
Molecular Weight	Approx. 950-1050 g/mol (variable)
Synonyms	Ultramarine Blue; C.I. Pigment Blue 29; Lapis Lazuli (synthetic); Ultramarine Violet; Ultramarine Pink; Sodium Aluminum Sulfosilicate; French Ultramarine; Permanent Blue
EINECS	234-393-9

Quality Control

Our Ultramarines are produced under a strict quality management system. Each batch is tested for critical parameters including color strength, hue, particle size distribution, and chemical composition to ensure batch-to-batch consistency. Certificates of Analysis (COA) detailing these specifications are available upon request. We can supply grades compliant with relevant standards for cosmetics, plastics, and food contact materials where applicable.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong acids. The product is not hygroscopic under normal conditions but should be protected from prolonged exposure to high humidity to prevent caking.

Specification

Item	Specification
Appearance	Fine blue powder
Color Strength (vs. Std.)	95 - 105%
Hue (L*, a*, b*)	Contact for details
Particle Size (D50)	0.5 - 10.0 µm (grade dependent)
Oil Absorption	25 - 40 g/100g
Water Soluble Matter	≤ 1.0 %
pH (10% slurry)	6.0 - 10.0
Heavy Metals (as Pb)	≤ 20 ppm (for specific grades)

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.