1. As a diesel fuel additive (core application)
• Improves diesel cetane number and combustion performance.
• Main function: Used to improve diesel fuel quality, especially suitable for secondary processed diesel fuels such as those from catalytic cracking and coking.

2. As an organic solvent
• Used in paints, coatings, adhesives, and other fields.
• Utilizes its low volatility and good solubility to provide good fluidity and wetting properties to products.

3. As a plasticizer for plastics
• Increases the softness and ductility of plastics.
• Can improve the processing and physical properties of plastics, but this application is relatively less common.

4. Scientific research and industrial synthesis
• As a nitrating agent, oxidizing agent, or esterification agent.
• In scientific research, it can be used to prepare specific compounds such as oxygen-containing explosives.