Caput Mortuum Synthetic 180 M, PR 101

bluish dark iron oxide red, Persian Red (> 3 nm)

• Chemical description: Fe2O3. Pigment Red 101, C.I. 77491
• Lightfastness - thinned: 8 (1 is bad, 8 is best)
• Lightfastness - medium: 8 (1 is bad, 8 is best)
• Lightfastness - concentrated: 8 (1 is bad, 8 is best)
• ColorIndex: PR 101.77491
• Suitability: Acrylics, Cement / Tadelakt, Ceramic, Lime / Fresco, Oil, Silicate binder, Waterglass, Tempera, Watercolor / Gouache
• Colors: Red, Violet
• Forms: powder
• Solubility in water: insoluble

Further technical specifications from the supplier can be read here.