Calcium Stearate is a white, waxy powder composed of calcium salts of stearic acid.
It is a non-toxic, low-solubility metallic soap widely used as a multifunctional additive in plastics, rubber, construction, and personal care industries. Known for its excellent lubricating, anti-caking, and water-repellent properties, calcium stearate is both economical and environmentally friendly.
Key Features
- Excellent internal and external lubricating properties
- Thermal stabilizer in PVC and other polymers
- Non-toxic and safe for food-contact and pharmaceutical use (in appropriate grades)
- Hydrophobic and anti-caking agent
- Acts as a release agent and processing aid
- Compatible with a wide range of materials (plastics, rubber, coatings, etc.)
Main Applications
1. Plastics & PVC Processing
- Acts as a heat stabilizer and lubricant in rigid and flexible PVC.
- Improves flow, processability, and surface finish of thermoplastics.
- Often combined with zinc stearate for balanced thermal stabilization.
2. Rubber Industry
- Used as an internal lubricant and release agent in synthetic and natural rubber processing.
- Prevents sticking to molds and rollers.
3. Construction & Cement
- Functions as a water repellent and grinding aid in cement and dry mix mortars.
- Improves flow and reduces dusting in powdered construction materials.
4. Coatings & Paints
- Acts as a flatting agent, anti-settling, and anti-caking additive in powder coatings and paints.
5. Powder Metallurgy & Tablets
- Used as a mold release agent in metal forming and tablet pressing in the pharmaceutical and nutraceutical industries.
6. Cosmetics & Personal Care
- Used as an opacifying agent, bulking agent, and lubricant in cosmetic powders and formulations (in pharma/cosmetic grade).
Technical Specifications
| Property | Specification Range |
|---|---|
| Appearance | Fine white powder |
| Chemical Name | Calcium Octadecanoate |
| Melting Point | >140°C (decomposes) |
| Bulk Density | 0.2 – 0.5 g/cm³ |
| Free Fatty Acid | < 3.0% |
| Moisture Content | < 2.0% |
| pH (10% Dispersion) | 7.0 – 9.5 |
| Solubility in Water | Insoluble |
| Heavy Metals | Within regulated limits |
Available Grades
- Technical Grade – For industrial use (plastics, rubber, coatings)
- Pharmaceutical/Food Grade – Complies with FDA, USP, or E470 standards
- Customized Grades – Tailored for specific particle size, purity, or formulation needs
Packaging & Storage
- Supplied in 20–25 kg bags (paper, PE-lined, or as specified)
- Store in a cool, dry place, away from heat and moisture
- Shelf life: 12–24 months in original sealed packaging