Humic acid is animal and plant remains, mainly plant remains, through the decomposition and transformation of microorganisms, as well as a series of chemical processes and accumulation of a class of organic substances. It is a kind of macromolecular organic acid composed of aromatic group and its various functional groups. It has good physiological activity, absorption, complexation and exchange functions. It widely exists in soil, lake, river, ocean, peat (also known as peat), lignite, weathered coal. According to the classification of nature, it can be divided into three types: soil humic acid, water humic acid and coal humic acid.
Humic acid is a kind of macromolecular organic matter widely existing in nature. It is widely used in agriculture, forestry, animal husbandry, petroleum, chemical industry, building materials, medicine and health, environmental protection and other fields, spanning dozens of industries. In particular, the promotion of ecological agriculture construction, pollution-free agricultural production, green food, pollution-free environmental protection products, etc., has made "humic acid" highly respected. Facts have proved that human life and survival can not do without humic acid.