Abstract: The chemical composition of the components from the waste of the larch bark tannin production and the surface activity of their sulfonated products were investigated. In comparison with the wood lignosulfonate, the higher surface activity and dispersity of the sulfonated product of waste from larch bark tannin prodution are originated from its tannin and phlobaphene components and the higher coment paste fluidity is due to the presence of tannin and phenolic acids.

Key words: Larch, lignosulfonate, tannin, phlobaphen, phenolic acid