Isostearic Acid is a mixture of C18 saturated branched-chain fatty acids, known for its unique properties that make it valuable in various industries. It is derived from the isomerization of oleic acid and subsequent hydrogenation, resulting in a product with a molecular formula of C18H36O2 and a molecular weight of 284.48.
This acid is characterized by its clear to light yellow liquid appearance and is insoluble in water but soluble in organic solvents such as toluene and ether. It has a melting point ranging from 67.8 to 68.5°C and a boiling point of approximately 400.8°C at 760 mmHg. Isostearic Acid exhibits excellent lubricity, detergency, emulsification, dispersion, and solubilization properties, with superior stability, low-temperature performance, and resistance to hard water compared to stearic acid.
Isostearic Acid is widely used in personal care and cosmetic products due to its emollient and emulsifying properties. It is also used as a lubricant in the plastic processing industry and as a raw material for various esters. Its branched-chain structure provides it with strong dispersing capabilities, making it useful for stabilizing pigments and mineral particles in oils and solvents.
Furthermore, Isostearic Acid is favored as an additive in engine and gear lubricants due to its low pour point, good oxidative stability, and water destabilisation. It is also used in pharmaceuticals, food, magnetic tapes, and coatings. In summary, Isostearic Acid is a versatile compound with applications spanning from cosmetics to industrial lubricants, leveraging its unique properties to enhance product performance and stability.