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Stearic Acid

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Stearic Acid

Stearic acid is a saturated fatty acid with a long hydrocarbon chain, containing 18 carbon atoms. Commonly derived from animal and vegetable fats, it serves a multitude of industrial applications. Due to its unique properties, acid is extensively used in the production of cosmetics, soaps, and candles, acting as a crucial ingredient for their formulation. In the manufacturing of rubber, the acid functions as a processing aid, improving the dispersion of fillers and enhancing the vulcanization process.

Additionally, acid plays a key role in the pharmaceutical and food industries as an emulsifying agent, contributing to the stabilization of formulations. With its waxy nature, stearic acid finds utility in various sectors, illustrating its versatility and significance in diverse chemical, industrial, and consumer product applications.

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Stearic Acid

Functions and Characteristics

  1. Saturated Fatty Acid: Stearic acid is a saturated fatty acid, consisting of a long hydrocarbon chain with 18 carbon atoms. This molecular structure contributes to its stability and unique properties.
  2. Derived from Animal and Vegetable Sources: Commonly obtained from animal fats (tallow) and vegetable oils, stearic acid is a naturally occurring substance, making it versatile and suitable for various applications.
  3. Versatility in Industrial Applications: Stearic acid plays a crucial role in a wide range of industrial applications, showcasing its versatility in sectors such as cosmetics, rubber processing, pharmaceuticals, and food.
  4. Cosmetic and Soap Formulation: Widely used in the cosmetic industry, stearic acid is an essential ingredient in the formulation of soaps, lotions, and creams. It contributes to the consistency and stability of these products.
  5. Candle Manufacturing: In candle production, stearic acid is utilized to enhance the hardness and opacity of candles. It serves as a key additive to modify the texture and burning characteristics.
  6. Rubber Processing Aid: In rubber manufacturing, stearic acid acts as a processing aid. It facilitates the dispersion of fillers in rubber compounds and improves the efficiency of the vulcanization process.
  7. Emulsifying Agent: Stearic acid is employed as an emulsifying agent in the pharmaceutical and food industries. It aids in creating stable emulsions, contributing to the formulation of various products.
  8. Waxy Nature: Due to its waxy consistency, stearic acid is easy to handle and incorporate into different formulations. This characteristic enhances its usability in manufacturing processes.
Item Typical Value
Model 1865 1842 1838 1820 1860
Appearance beaded beaded beaded beaded beaded
Iodine value (g/100g) 0.05-0.2 0.15-0.3 0.15-0.3 0.1-0.3 1.0-3.0
Acid value(mgKOH/g) 205+0.5 210+0.5 212+0.5 215.51 205.0+1
Saponification value(mgKOH/g) 206+0.5 209+0.5 211.0+0.5 215.0+1 205.5+1
Color(Hazen) 20-30 20-40 20-40 50-80 150-250
Moisture% <0.1 ≤0.1 ≤0.1 ≤0.3 <0.3

Major Applications

Metal Processing:

In metalworking, stearic acid is used as a lubricant and release agent in processes such as metal forming and pressing. It aids in preventing sticking and facilitates smooth operations.

Textile Industry:

Stearic acid is employed in the textile industry as a softening and sizing agent. It enhances the texture of fabrics and contributes to the ease of handling during manufacturing processes.


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