Sulfhemoglobin is a green-pigmented derivative of hemoglobin, where a sulfur atom is incorporated into the hemoglobin molecule. Unlike normal hemoglobin, sulfhemoglobin is incapable of carrying oxygen, leading to a condition known as sulfhemoglobinemia. This condition can cause cyanosis, where the skin and mucous membranes take on a bluish or purplish discoloration.
