Stearic Acid is a saturated long-chain fatty acid, typically derived from vegetable fats or animal tallow.
It appears as a white, waxy solid or powder and is widely used as a surfactant, emulsifier, lubricant, and softening agent in a variety of industries, including plastics, rubber, cosmetics, and pharmaceuticals.
With the chemical formula C₁₈H₃₆O₂, stearic acid is known for its excellent lubricating, stabilizing, and thickening properties, making it a valuable multifunctional ingredient.
Key Features
- High purity and consistent quality
- Good thermal and oxidative stability
- Excellent lubricating and release properties
- Biodegradable and non-toxic
- Available in triple-pressed, double-pressed, and commercial grades
- Derived from vegetable or animal-based feedstocks
Main Applications
1. Plastics Industry
- Acts as a lubricant and release agent in PVC and other thermoplastics.
- Used as a processing aid to improve melt flow and dispersion of fillers/pigments.
- Helps reduce die buildup during extrusion.
2. Rubber Industry
- Functions as an activator in vulcanization (especially with zinc oxide).
- Provides internal lubrication and mold release during rubber processing.
- Enhances filler dispersion and improves the flow of rubber compounds.
3. Cosmetics & Personal Care
- Acts as a thickening agent, emulsifier, and stabilizer in creams, lotions, soaps, and lipsticks.
- Provides a smooth, soft feel and enhances product stability.
4. Pharmaceuticals
- Used as a tablet lubricant in solid dosage forms.
- Compliant with USP and BP pharmacopeia standards (in pharma-grade).
5. Candle & Wax Manufacturing
- Increases hardness and opacity of candles.
- Improves burn time and prevents dripping.
6. Metal Processing
- Used as a metal lubricant and anti-corrosion additive in metalworking fluids.
7. Detergents & Soaps
- Essential ingredient in bar soaps and detergent cakes.
- Provides body and structure to soap bars and improves foaming properties.
Technical Specifications
| Property | Specification Range |
|---|---|
| Appearance | White flakes/powder |
| Acid Value | 195 – 205 mg KOH/g |
| Iodine Value | < 4 |
| Saponification Value | 196 – 210 |
| Titre (Melting Point) | 54 – 58°C |
| Moisture Content | ≤ 0.2% |
| Color (Lovibond) | ≤ 2.0 Y (1” cell) |
| Odor | Mild, fatty odor |
| Solubility | Insoluble in water; soluble in alcohols and organic solvents |
Available Grades
- Triple-Pressed Stearic Acid: High purity, low color – ideal for cosmetics, pharmaceuticals, and PVC.
- Double-Pressed Stearic Acid: Balanced grade for rubber and general industrial use.
- Commercial Grade: Cost-effective option for soaps, candles, and general applications.
- Vegetable-Based / Animal-Based: Available upon request to meet regulatory or formulation needs.
Packaging & Storage
- Available in 25 kg bags, 500 kg or 1 MT jumbo bags
- Store in a dry, well-ventilated area, away from heat and moisture
- Shelf life: 24 months in original, unopened packaging