PHARMACOGNOSTICAL CHARACTERIZATION AND PHYTOCHEMICAL ANALYSIS OF WITHANIA SOMNIFERA DUNAL ROOT FROM NORTHERN INDIA

Objective: The present study aims to establish the pharmacognostical characterization and phytochemical standardization of Withania somnifera Dunal root collected from Northern India. Methods: The root material was subjected to evaluation following the World Health Organization (WHO) and Ayurvedic Pharmacopoeia protocols. Successive extractions were carried out using petroleum ether, chloroform, alcohol, hydro-alcohol (1:1), and water. Preliminary phytochemical profiling and TLC fingerprinting were performed on solvent extracts. Safety parameters including heavy metals, aflatoxins (AFs), microbial load, and pesticide residues were assessed using validated analytical methods. The combined results were used to establish reproducible pharmacognostical and phytochemical standards for Northern Indian root material. Results: The root showed a characteristic grayish-yellow color, bitter taste, cylindrical morphology, and fibrous fracture. Microscopical examination revealed cork cells, parenchyma, xylem vessels, and abundant starch grains. The pharmacognostic analysis showed foreign matter (0.19±0.02%), swelling index (3.9±0.3 mL/g), bitterness value (2.9±0.4 units/g), total ash (6.6±0.1%), acid-insoluble ash (0.56±0.04%), water-soluble ash (1.7±0.2%), and moisture content (4.46± 0.04%), all within acceptable limits for crude herbal materials. Extractive values were found to be highest in hydro-alcoholic hot and successive extracts, 13.46±0.21% and 19.59±0.18%, respectively. However, cold extractive value was comparatively high inaqueous extract (9.7±0.1%), which is higher than extractive values reported in several earlier studies on W. somnifera from other Indian regions. Preliminary phytochemical screening confirmed the presence of alkaloids, flavonoids, tannins, saponins, and steroids. TLC revealed distinct spots with retention factor (Rf) values ranging from 0.12 to 0.93. Total tannin content was 8.176 mg/g. Heavy metals, AFs, microbial contamination, and pesticide residues were all within WHO permissible limits ensuring sample safety. Conclusion: The analytical findings establish a comprehensive pharmacognostical and phytochemical profile of W. somnifera root from Northern India. The comparatively high hydroalcoholic extractive values and complex TLC fingerprint of polar extracts represent useful diagnostic markers for this regional chemotype and support its safe inclusion in pharmacopeial monographs and quality control of herbal formulations.