Lignin sulfonic acid
→ see also: Ligninsulphonate Ligninsulphonic
acid is the chemically not exactly defined reaction product of lignin with sulphurous acid . Calcium salts of lignosulfonic acid produced during digestion of wood with calcium bisulfite solutions in the production of pulp .
Individual evidence
- ^ Brockhaus ABC Chemie in two volumes, VEB FA Brockhaus Verlag Leipzig, 1965, page 799.