Ultramarine is an inorganic blue pigment based on sodium aluminosilicate with sulfur inclusions (Na₆₋₁₀Al₆Si₆O₂₄S₂₋₄). Non-toxic, lightfast and alkali-resistant. Applications: coloring plastics (PVC, polyolefins — stable during processing), paints and coatings production, ceramics and porcelain (underglaze color), detergents (optical brightener — neutralizes yellowness), construction materials (coloring concrete, plaster), cosmetics (eye shadow, soap). Grades: USP (standard ultramarine for plastics), UMP (for paints), UMF (fine particle, for cosmetics). GOST 21410-75 "Ultramarine". Packaging: 25 kg bags, big bags. Export documentation: Safety Data Sheet (SDS/MSDS), Certificate of Analysis (CoA), Certificate of Origin. Export supplies to China, EAEU, Middle East, Southeast Asia.