The physicochemical properties (pH, electrical conductivity, relative viscosity, and surface tension) of carboxymethylated wood solutions were studied. It was found that CMD solutions have an alkaline environment, low viscosity, and weaker intra- and intermolecular interactions than solutions of its structural analogue (CMC). The effect of mechanical action on intermolecular interactions and the strength of structural formations in CMD solutions was estimated using rotational viscometry in the shear rate range of 10–000 s-1 and at a temperature of 20 to 50 °C. It was shown that stable rheological behavior of the studied preparation was observed at a concentration of 0.1% in the temperature range of 20–40 °C. At this concentration, the CMD preparation exhibits surface-active properties similar to those of the industrial preparation Neon 99 and can be used as an adjuvant in pesticide treatment of plants.