Ultramarine Violet Pigment Pigment Violet 15 | C.I. 77013
Engineered synthetic sodium alumino sulfosilicate providing a unique reddish-violet hue with outstanding thermal endurance up to 300°C+, lightfastness of Blue Wool 7–8, and non-warping behavior in polyolefin polymers.
C.I. Pigment Violet 15
Chemical Family: Sodium Alumino Sulfosilicate
Technical Specification & Laboratory Properties
Certified values determined in accordance with international ISO 787 test standards.
| Physical & Chemical Property | Standard Specification Value | Test Method |
|---|---|---|
| Colour Index Name | Pigment Violet 15 (PV 15) | ISO 787 / In-house QC |
| Colour Index Number | C.I. 77013 | ISO 787 / In-house QC |
| Chemical Constitution | Synthetic Sodium Alumino Sulfosilicate | ISO 787 / In-house QC |
| CAS Registry Number | 12769-96-9 | ISO 787 / In-house QC |
| EINECS Number | 235-811-0 | ISO 787 / In-house QC |
| Specific Gravity | 2.30 – 2.35 g/cm³ | ISO 787 / In-house QC |
| Mean Particle Size (D50) | 1.0 – 2.5 µm | ISO 787 / In-house QC |
| Oil Absorption | 30 – 38 g / 100g | ISO 787 / In-house QC |
| Moisture Content (at 105°C) | < 0.8% max | ISO 787 / In-house QC |
| Water Soluble Matter | < 1.0% max | ISO 787 / In-house QC |
| Thermal Stability | 300°C+ (Polymer processing) | ISO 787 / In-house QC |
| Lightfastness (Full Shade / Tint) | Blue Wool Scale 7 – 8 | ISO 787 / In-house QC |
| Alkali Resistance (5% NaOH) | 5 / 5 (Exceptional) | ISO 787 / In-house QC |
| Acid Resistance (5% HCl) | 1 / 5 (Acid sensitive; decomposes with H₂S) | ISO 787 / In-house QC |
RS Ultramarine Violet Grade Portfolio
Formulated for targeted polymer processes, industrial surface coatings, and safety-compliant consumer goods.
Masterbatch & Polymer Grade
Specially micronized for masterbatch compounding, blown films, and injection molded engineering resins. Guaranteed non-nucleating to eliminate polymer distortion.
Industrial Coatings & Inks Grade
High gloss retention, outstanding exterior weatherability, and zero solvent bleed for industrial baking enamels, coil coatings, and flexographic packaging inks.
Cosmetic & High Purity Grade
Ultra-pure synthetic violet pigment meeting international cosmetic regulations (FDA 21 CFR § 73.2725 and EU Cosmetic Reg. 1223/2009). Low heavy metals content.
Zero Distortion in Polyolefins
Unlike carbazole violet or phthalocyanine blues, synthetic Ultramarine Violet is non-nucleating, preserving strict dimensional tolerances in large molded plastics.
Heat Stable to 300°C+
Resists thermal degradation during high-temperature polymer extrusion and stoving coatings where organic violet alternatives decompose and brown.
Zero Solvent Bleed
Insoluble in organic solvents, plasticizers, and aromatic hydrocarbons, preventing migration and discoloration in flexible vinyl, inks, and coatings.
Regulatory & Toy Safe
Completely non-toxic, conforming to European EN 71-3 toy safety requirements, FDA food contact regulations, and REACH compliance standards.
Frequently Asked Technical Questions
Chemical behavior, polymer processing, and formulation guidelines.
How does Ultramarine Violet differ chemically from Ultramarine Blue?
Ultramarine Violet (PV 15 / CI 77013) is produced from synthetic Ultramarine Blue through a secondary thermal oxidation process with dry gaseous HCl or ammonium chloride at 200–250°C. This alters the sulfur chromophore within the sodalite cage from radical S₃⁻ (blue) to S₄ or related polysulfide radical species, shifting absorbance to produce a unique reddish-violet hue.
Does Ultramarine Violet cause warpage in polypropylene or polyethylene?
No. Like synthetic Ultramarine Blue, Ultramarine Violet is completely non-nucleating in semi-crystalline thermoplastics. Unlike organic violet pigments (such as carbazole violet PV 23 or quinacridone violet), it preserves dimensional stability and avoids asymmetric mold shrinkage in caps, closures, and containers.
What is the lightfastness and weatherability rating of Ultramarine Violet?
Ultramarine Violet demonstrates outstanding lightfastness with a rating of 7 to 8 on the Blue Wool Scale in full shades and 7 in tint reductions, outperforming most organic violets in long-term UV resistance.
Can Ultramarine Violet be used in acidic polymer formulations?
No. Synthetic ultramarines are acid-sensitive alumino-silicates. They decompose in acidic environments (pH < 4) with the evolution of hydrogen sulfide gas. However, their alkali stability is virtually unmatched (5/5 rating).
Evaluate RS Ultramarine Violet in Your Laboratory
Order standard 1kg or 5kg laboratory sample kits with batch-certified Certificate of Analysis (CoA) and full technical datasheet (TDS).