Nanotoxicology is a growing discipline with roots in the toxicity of ultrafine particles in the environment. Nanotoxicology is a discipline of toxicology that studies the toxicity of nanomaterials originating from manufacturing processes (such as spray drying or grinding), combustion processes (such as diesel soot), and naturally occurring processes (such as atmospheric reactions or volcanic eruptions). Some cell subpopulations are more toxic to nanoparticles than others, and toxicity generally varies with cell cycle. Nanotoxicological research focuses on determining the toxic/hazardous effects of nanoparticles and nanopharmaceuticals on individuals and the environment. For toxicological and scientific journals that publish findings from nanotoxicology investigations, improving the quality of data presentation in nanotoxicology studies, particularly in the area of test item characterization, is a major concern.