Chemical Safety Concerns of Sulfur Mustard Analog, 2-Chloroethyl Ethyl Sulfide, in Laboratory Study

: Sulfur mustard (SM), a classic chemical weapon in the vesicant category, can induce severe damage, for which the therapy is still limited even today. Laboratory work is essential in unveiling toxicological effects and developing medical countermeasures. Sulfur mustard analog 2-chloroethyl ethyl sulfide (CEES), is employed in the lab for less toxicity. However, due to its similar characteristics to SM (being oily, hydrophobic, and volatile), the manipulation of CEES still needs special attention to avoid personnel injury and laboratory pollution. Here, to clear the chemical safety concerns in the laboratory study of CEES, the working procedure and experimental data are summarized, which might help educate new researchers to be skilled and professional.

Reactive Organic Suspensions Comprising ZnO, TiO2, and Zeolite Nanosized Adsorbents: Evaluation of Decontamination Efficiency on Soman and Sulfur Mustard

This paper comprises an extensive study on the evaluation of decontamination efficiency of three types of reactive organic suspensions (based on nanosized adsorbents) on two real chemical warfare agents: soman (GD) and sulfur mustard (HD). Three types of nanoparticles (ZnO, TiO2, and zeolite) were employed in the decontamination formulations, for enhancing the degradation of the toxic agents. The efficacy of each decontamination solution was investigated by means of GC-MS analysis, considering the initial concentration of toxic agent and the residual toxic concentration, measured at different time intervals, until the completion of the decontamination process. The conversion of the two chemical warfare agents (HD and GD) into their decontamination products was also monitored for 24 h.

Development and Human Testing of Chemical Warfare Agents and Means of Treatment of Lesions in Germany in 1933–1945

Despite serious attention to the issues of war crimes and crimes against humanity, committed on an unprecedented scale in concentration camps in Nazi Germany, the problem of medical experiments on prisoners appears to be one of the least-studied in modern Russian historiography. Moreover, no special attention was paid to testing chemical weapons on humans. The aim of this work is to review the history of the development and testing of chemical warfare agents (CWA) in Germany in 1933–1945. During the First World War, Germany was one of the leading countries in the sphere of military chemistry in the world. After the Versailles treaty this potential was largely lost as a result of the restrictions. After the National Socialist German Workers' Party (NSDAP) came to power, Germany not only restored, but also increased its military power and achieved a qualitative superiority over its opponents in the field of chemical weapons. The tests of CWA, as well as the study of the effectiveness of the means and protocols for the treatment of the lesions caused by CWA, were carried out both by the military structures of the Wehrmacht and the SS, and by civilian research and academic institutions. Experiments on prisoners were carried out in the concentration camps of Dachau, Ravensbrück, Auschwitz-Birkenau, Buchenwald, Sachsenhausen, Natzweiler-Struthof, Neuengamme, etc. Basically, the damaging effects of sulfur mustard and phosgene was investigated. In Auschwitz-Birkenau «a study of the action of various chemical preparations was carried out on the orders of German firms». After the war several SS doctors, who performed involuntary experiments on humans, were convicted by military tribunals for war crimes and crimes against humanity. Seven doctors were sentenced to death and executed on June 2, 1948, at the prison for war criminals in Landsberg, Bavaria. As a result of the Nuremberg trials, the Nuremberg Code was drawn up. It was the first international document that introduced ethical standards for scientists engaged in experiments on humans. It consisted of 10 principles, including the necessity of voluntary informed consent of the patient for the participation in medical experiments after providing him with full information about the nature, duration and purpose of the experiment; on the methods of its implementation; about all the perceived inconveniences and dangers associated with the experiment, and, finally, the possible consequences for the physical or mental health of the subject, which may arise as a result of his participation in the experiment.

Eco–Friendly Peelable Active Nanocomposite Films Designed for Biological and Chemical Warfare Agents Decontamination

In the context of imminent threats concerning biological and chemical warfare agents, the aim of this study was the development of a new method for biological and chemical decontamination, employing non-toxic, film-forming, water-based biodegradable solutions, using a nano sized reagent together with bentonite as trapping agents for the biological and chemical contaminants. Bentonite-supported nanoparticles of Cu, TiO2, and Ag were successfully synthesized and dispersed in a polyvinyl alcohol (PVA)/glycerol (GLY) aqueous solution. The decontamination effectiveness of the proposed solutions was evaluated by qualitative and quantitative analytical techniques on various micro-organisms, with sulfur mustard (HD) and dimethyl methylphosphonate (DMMP) as contaminants. The results indicate that the peelable active nanocomposite films can be successfully used on contaminated surfaces to neutralize and entrap the hazardous materials and their degradation products. Mechanical and thermal characterization of the polymeric films was also performed to validate the decontamination solution’s potential as peelable-film generating materials. The removal efficacy from the contaminated surfaces for the tested micro-organisms varied between 93% and 97%, while for the chemical agent HD, the highest decontamination factor obtained was 90.89%. DMMP was almost completely removed from the contaminated surfaces, and a decontamination factor of 99.97% was obtained.