Humic Acid Substances
Humic acid is a class of organic substances mainly found in humus in soil. It is formed by microbial decomposition of plant and animal remains and has a brown to black color. Humic acid usually has a variety of functional groups, such as carboxylic acid, phenolic, amide, etc., and has strong acidity. G-Teck had researched to make humic acid and fulvic acid with different raw material, such as mine source(leonardite).