1. Introduction: What is Ethylhexyl Nitrate (2-EHN)? Ethylhexyl nitrate (2-EHN), often referred to by its chemical name 2-Ethylhexyl nitrate (CAS No. 27247-96-7), is an organic nitrate ester with the molecular formula C₈H₁₇NO₃ and a molecular weight of 175.23 g/mol. In the fuel industry, it is predominantly known as a cetane improver—a diesel fuel additive that enhances the ignition quality of diesel, leading to smoother combustion, reduced engine noise, lower emissions, and better cold-start performance. The product is typically a colorless to light yellow liquid with a mild, fruity, or characteristic odor. With a density of 0.963 g/mL at 25°C and a flash point of 168°F (75.6°C), it is classified as a Class 9 hazardous material…