Acute Toxicity and Efficacy of Nanomaterial based Decontamination Formulation Developed for Personal Decontamination against Chemical Warfare Agents

This study addresses the efficacy of nanomaterials based formulation developed for personal decontamination application against chemical warfare agents and used in Personal Decontamination Kit (PDK). It has the potential to decontaminate the skin of an individual, protective equipment, and small arms contaminated with chemical warfare agents. As this formulation has been developed for personal decontamination, risk of nanomaterial toxicity would always be there while sprinkling or applying to the affected area. It may get into the body through various routes specifically through the inhalation route. The aim of this study was to evaluate in vivo decontamination efficiency of the formulation and acute inhalation, intratracheal, intranasal, oral, dermal, and intraperitoneal toxicity of the formulation. 14 days survival was recorded for the evaluation of decontamination efficiency of this formulation. Various endpoints were considered while assessing the toxicity of Nanomaterial Decontamination Formulation which include Organ Body Weight Index (OBWI), serum biochemical parameters, and respiratory variables like tidal volume, respiratory rate, time of inspiration, time of expiration, etc. LD50 of the formulation were also determined for various routes. As skin is the primary organ to come in contact with the decontaminant, its primary skin irritation response has also been determined in this study. It was found that there is no gross acute toxicity observed at different doses. Though there were some changes in the initial respiratory pattern, they were all later recovered. The preliminary histological evaluation did not show any adverse effect on various organs after exposure with NDF.