Catechu black extract is prepared from heartwood of Acacia catechu Willd.
Definition
Extractives and their physically modified derivatives. It is a resinous product which may contain resin acids and their esters, terpenes, and oxidation or polymerization products of these terpenes. (Acacia catechu), Leguminosae).
Catechu (resin) Preparation Products And Raw materials