Abstract:The technology on obtaining enterosorbent from local feedstock-hydrolyzed lignin of cotton seed hulls named Zerotox was developed. The purpose of this research is to conduct a complex study on its physical-chemical and pharmacological properties. Samples of cotton hydrolyzed lignin based enterosorbent Zerotox were investigated, wood hydrolyzed lignin based enterosorbent Polifepan (Russia) was used as a comparison drug. The technology of new medical enterosorbent Zerotox, based on cotton hydrolyzed lignin, has been developed with its physical-chemical and pharmacological characteristics being researched. Comparative research on adsorbing capacity of sorbent Zerotox (80 mg/g) and its analogue-Polipefan (55 mg/g), which is obtained from wood hydrolyzed lignin, has displayed advantages of the new sorbent. IR-spectroscopy research on lignin sorbent Zerotox has shown presence of oxygen-containing functional groups which determine its high absorbing capacity due to its chemisorption. Atomic-adsorptive method has proved high absorbing capacity of the sorbent towards heavy metals ions. Acute and chronic toxicity and antidiarrheal activity of enterosorbent Zerotox have also been studied.