A very bright orange-ish, semi-transparent red, is a synthetic pigment with good lightfastness. It is a good choice as an alternative to Cadmium Red Light.
Pigment Classification: Inorganic
Color Index Name: PR112
Color Index Number: 12370
Chemical Description: Naphthol AS-D
Opacity/Transparency: Semi-Opaque
Lightfastness Rating: 2
Permanency: Very Good
Munsell Notation Listing: N/A
Gloss Average: N/A
Viscosity Range: 75-100 CPS
CIE L*a*b* Values: N/A
Tint Strength: N/A