I remember using this color in a still life when I was about 12 years old. I struggled to render a reflection in a tabletop. After much repainting, I went to my professor for help. He said “Man, I sometimes have to put two or three layers on the thing before I get it right.” This was less than encouraging because at that point I already had about eight layers down.
The color is a rich, high saturation mahogany that tints strong. When mixed with a Phthalo blue, it makes an inky black. Mussini has always been my go-to brand for this color.