Solvent Yellow 2, also known as Solvent Yellow 14, is a synthetic dye primarily used as a coloring agent in a variety of industries. Its applications include:

1. Fuel Industry: Solvent Yellow 2 is often used to color fuels, such as diesel and kerosene. It helps to distinguish different types of fuels and can be used for anti-theft purposes or to identify tax-exempt fuels.

2. Plastics and Polymers: It is employed in the coloring of plastics and synthetic resins, providing a yellow hue to the materials.

3. Paints and Coatings: Solvent Yellow 2 is used in the formulation of paints, coatings, and varnishes, especially for products requiring bright, vibrant yellow coloration.

4. Inks: It is a component in printing inks, particularly for producing yellow hues in flexographic and gravure printing processes.

5. Cosmetics: It has been used in some cosmetics, such as soaps and shampoos, although its use in cosmetics is subject to regulatory approval depending on the country.

6. Textiles: It is also used as a dye in the textile industry for coloring fabrics.

7. Chemical Indicator: Due to its color properties, Solvent Yellow 2 may be used as a colorant in certain chemical processes or as an indicator for different materials.

Though widely used, the safety and environmental impact of Solvent Yellow 2 are also considerations, as with most synthetic dyes. Always check local regulations regarding its approved applications.