What is the role of Menadione?

Vitamin K Menadione, also known as hydrogenation, is a fat-soluble vitamin. There are three types, K1; K2 manufactured by the intestinal bacteria, K3 is a synthetic material.
Its main function: 1, to prevent neonatal bleeding disease; 2, to prevent internal bleeding and hemorrhoids; 3, to reduce heavy bleeding menstrual period; 4, to promote normal blood coagulation.