Synthetic organic pigment
When used with cement only for interior use. Do not treat with hydrochloric acid.
CI: PV 19.73900
Chemical Formula: C20H12N2O2
Lightfastness: Concentrated: 8, Medium: 7, Thinned: 7 (1 is poor, 8 is best).
Stable in Acid: 5, Alkali: 5, Lime: 5 (1 is poor, 5 is best).
Suitability: Oil, Acrylics, Tempera, Watercolor / Gouache, Lime / Fresco, Cement, Violin Varnish /Wooden Surfaces, Tadelakt