Pigment Blue 29 — Technical Specifications
Pigment Blue 29 is the internationally recognized Color Index designation for synthetic Ultramarine Blue pigment. With CI number 77007 and CAS number 57455-37-5, Pigment Blue 29 is one of the most widely specified inorganic pigments in industrial standards worldwide.
Technical specifications of Pigment Blue 29 from SKU Pigments:
- Chemical Name: Sodium aluminosilicate sulfide
- Molecular Formula: Na₆Al₆Si₆O₂₄S₄
- Specific Gravity: 2.35 g/cm³
- Refractive Index: 1.50–1.52
- Oil Absorption: 30–40 g/100g
- Average Particle Size: 1–5 microns (grade dependent)
- Heat Stability: Stable to 400°C continuously
- pH (10% slurry): 7.0–9.5
- Loss on Drying (105°C): <1%
- Color Strength: 85%–115% of international standard (grade dependent)
Where Pigment Blue 29 Is Used and How to Specify It
Pigment Blue 29 is the correct specification term for Ultramarine Blue in technical documents, purchasing specifications, and regulatory filings. It is used across the following industries:
- Architectural Paints: Pigment Blue 29 provides alkali-resistant blue in exterior masonry coatings and cement-based paints — one of its most important differentiators from organic blues.
- Industrial Coatings: Used in anti-corrosion primers and maintenance coatings where color durability and chemical resistance are required.
- Plastic Masterbatch: Pigment Blue 29 at 20–40% loading in PP or PE carrier creates masterbatch concentrates used throughout the plastics industry.
- Laundry Products: At 0.01–0.05% loading, Pigment Blue 29 provides optical brightening in white detergent powder and tablets.
- Printing Inks: Standard-grade Pigment Blue 29 delivers clean blue tones in packaging and commercial printing inks.
- Rubber: Compatible with sulfur vulcanization systems, Pigment Blue 29 colors rubber goods including sports equipment and industrial seals.
SKU Pigments supplies Pigment Blue 29 in multiple grades with complete technical documentation. Request your free sample and TDS today.
Technical resources: Ultramarine Blue Products | UB for Masterbatch | Download TDS
External: Pigment Blue 29 — PubChem | Color Index International
Related Reading: Ultramarine Blue Pigment Guide | Pigment Violet 15 Guide | Pigment Manufacturer India
About SKU Pigments: Shree Krishna Ultramarine Pigments P. Limited is India’s leading manufacturer of Ultramarine Blue (Pigment Blue 29), Ultramarine Violet (Pigment Violet 15), and Ultramarine Pink pigments. ISO 9001:2015 certified. Exporting to 40+ countries. Contact us for free samples and export pricing.