The red obtained from Pterocarpus santalinum or red sandalwood is a complex molecule known as santalin. There are a number of forms of this basic structure all of which give quite intense red colours. The stability of this red is quite good compared to the others. It has been traditionally used for many centuries. The chemicals in Red Sandalwood either yield a red colour (Santalin A or Santalin B), or a yellow colour (Santalin Y).
