International Humic Substances Society
2024 Products 

Humic substances (HS) are complex and heterogeneous mixtures of polydispersed materials formed in soils, sediments, and natural waters by biochemical and chemical reactions during the decay and transformation of plant and microbial remains (a process called humification).

 

 

Standard Humic and Fulvic Acids
Reference Aquatic NOM
Bulk Source