Ultramarine Blue is Synthetic Inorganic pigment. Ultramarine Blue is the most commonly used blue earth pigment. It is a kind of sulphur compound of aluminous silicate, which has a crystal structure associated with celestite. So it has very bright light and pure color.

Product Name:Ultramarine Blue/ Ultramarine C. I. Pigment Blue 29 (77007)
CAS NO 57455-37-5
Molecular Weight: 862.60578
Molecular Formula: Na6Al4Si6S4O20
Application
Shade: Reddish blue
Main Application: building coating, paint, Detergent, Stationery ,plastic etc.