Does not contain mercuric sulfide - instead this Cadmium has the intensity and sweetness of Genuine Vermilion. It lies between our Cadmium Red and Cadmium Red Light. Series: 7 CI Number: NA CI Name: PR108 Pigment Name: Cadmium Sulfo-Selenide Lightfastness: ASTM I - Excellent Opacity: Opaque Grind: Fine