Pigment Blue 29: Crystal Structure, Properties, and Industrial Grades
Pigment Blue 29 (Colour Index Constitution Number CI 77007, CAS Registry Number 57455-37-5) is a synthetic inorganic sodium alumino sulfosilicate pigment. Its crystalline architecture consists of an open zeolitic sodalite framework built from interconnected aluminum and silicon tetrahedra.
The characteristic brilliant reddish-blue hue arises from radical trisulfur anions (S3-) encapsulated within the sodalite cages. Because these chromophores are trapped inside the rigid aluminosilicate framework, the pigment is completely insoluble in water and organic solvents, eliminating migration and bleeding.
RS Pigments manufactures four specialized industrial grades tailored for specific industrial applications: Standard Industrial Grade for laundry bluing and paper whitening, High Tinting Strength Grade for polyolefin masterbatch, Heat-Resistant Grade for engineering plastics up to 350°C, and Cosmetic Grade conforming strictly to FDA and EN 71-3 safety regulations.
Key Technical Takeaways
- Ultramarine Blue is chemically non-nucleating, eliminating shrinkage and warping in HDPE and PP injection moldings.
- Thermal stability up to 350°C in specialized heat-resistant grades and NANOX compounding platforms.
- Total resistance to alkaline environments (5/5 rating), ideal for masonry coatings, concrete, and laundry powders.
Need Technical Testing Samples for Your Lab?
RS Pigments supplies 1kg and 5kg trial sample packs with certified CoA, complete particle size distribution, and FPV analysis.