Description
Introduction
Stearic acid is a saturated fatty acid with the chemical formula C18H36O2 that plays a crucial role in various industrial and personal care applications. It is a waxy, solid substance that occurs naturally in various animal and plant fats. Stearic acid is one of the most common long-chain fatty acids and is often found in fats like tallow, cocoa butter, and shea butter.
Here are some key points about stearic acid:
Chemical Structure:
Stearic acid is composed of a long hydrocarbon chain with 18 carbon atoms (C18) and a carboxyl group (COOH) at the end. It has a saturated structure, meaning that all of its carbon-carbon bonds are single bonds and the molecule lacks any double bonds.
Physical Properties:
At room temperature, stearic acid is a white, odorless, and tasteless solid. It has a melting point of around 69-72°C (156-162°F), which makes it useful in various applications where a solid fat is needed.
IUPAC Chemical Name :
Octadecanoic Acid
INCI Chemical Name :
Octadecanoic Acid
Other Names :
Octadecanoic Acid, C18:0(lipid numbers)
CAS No:
57-11-4
Formula :
C18H36O2
Derived from :
It is a derived from Vegetable Oil and Fats, making it a natural.
Certified & Safety Rating :
EWG 1
Solubility :
Insoluble in water, soluble in oil & organic solvents such as Ethanol.
Uses
Stearic acid has a wide range of applications in various industries:
Cosmetics and Personal Care:
It is used in cosmetics and personal care products, including creams, lotions, soaps, & shampoos as an emulsifying agent, thickener, and stabilizer.
Candles:
Stearic Acid is a common ingredient in candle making, providing hardness and opacity to candles while reducing dripping and smoke.
Pharmaceuticals:
It is utilized in the production of pharmaceutical tablets and capsules to improve their binding properties and disintegration as a lubricant and binder.
Food Industry:
Stearic Acid is used as a food additive, primarily as a coating for candies and chewing gum to prevent sticking, providing a glossy texture to some candies and giving a smooth feel to chocolates.
Rubber Industry:
It is used in the rubber industry to enhance the processing and vulcanization of rubber products.
Surfactants and Cleansers:
Stearic Acid serves as a surfactant in some cleaning products, aiding in the emulsification of oils and dirt.
Lubricants and Greases:
It is used as a thickener and lubricating agent in various lubricant formulations.
Precautions
Stearic Acid is generally considered safe for use in formulated products. However, individuals with specific allergies or sensitivities should consider patch testing before using products containing this ingredient. Adhering to recommended usage levels and formulation guidelines ensures optimal performance and compatibility.
Environmental Impact: Stearic acid is biodegradable and does not accumulate in the environment. It is derived from renewable resources like animal fats and plant oils.
Health Considerations: Stearic acid is generally considered safe for consumption and topical use. It is a type of saturated fat, and while excessive consumption of saturated fats is associated with certain health risks, stearic acid is considered to have a neutral effect on blood cholesterol levels compared to other saturated fats.
In conclusion, Stearic Acid’s versatility and unique properties make it a valuable ingredient in various industries. Its ability to function as an emulsifier, thickener, and stabilizer contributes to the quality and efficacy of a wide range of products, from cosmetics to candles and beyond.
