1. Appearance: Colorless liquid.
3. Density: Approximately 0.919g/cm3
4. Solubility: Easily soluble in alcohol and ether solvents.
5. Chemical properties: Isononanoic acid is acidic and can react with bases to form salts. It can also undergo esterification and aldolization reactions.

Purpose:
1. Can be used as a wetting agent, softener, and plasticizer, commonly used in industries such as coatings, resins, rubber, and plastics.
2. It has good volatility and can be used as solvent in products such as ink, ink-jet ink and perfume.