Overview
Calcium stearate (CAS 1592-23-0 ), also known as calcium distearate, is a calcium soap of stearic acid used across plastics, rubber, pharmaceuticals, and construction materials.
It functions primarily as a lubricant, release agent, and stabilizer, preventing adhesion, reducing friction, and controlling flow in solid processing systems.
In PVC and polymer compounding, it acts as an internal and external lubricant, improving melt flow and preventing die buildup during extrusion and calendering.
Pharmaceutical tablet manufacturers use it as a die lubricant and anti-caking agent to ensure consistent tablet weight and clean press release during the manufacturing process.
In concrete and building products, it waterproofs cement mixes and improves workability without compromising structural integrity. Rubber processors incorporate it as a mold release agent.
It also serves as a dispersing aid for fillers, reducing cycle times and improving surface finish on molded parts. Calcium stearate is supplied as a fine white powder.
Particle size and bulk density vary by grade to suit different processing requirements. Food-grade and pharmaceutical-grade material is available, meeting USP and Ph. Eur. specifications.
Technical-grade product is standard for plastics, rubber, and construction applications, where purity thresholds are less stringent for industrial manufacturing needs.
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Physical Properties
| Melting Point | 179 °C |
| Density | 1.12 g/cm³ |
| Flash Point | > 260 °C |
| Color | white |
| Odor | Fatty acid odor |
| Form | Powder |
| Water Solubility | insoluble H2O, ether, chloroform; slightly soluble hot mineral oils [MER06] |
| Vapor Pressure | 0Pa at 25℃ |
| pH | 7-9 (2.2 mg/l, H2O, 20°C) |
| Log P | 3.82-14.34 at 25℃ |
Safety & Handling
Warning GHS07 Hazard Statements H319 Causes serious eye irritation H335 May cause respiratory irritation Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P319 Get medical advice/attention if you feel unwell. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29157030 |
Other Names
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Chemical Properties
- CAS Number
- 1592-23-0
- EC Number
- 216-472-8
- Mol. Weight
- 607.0
- HS Code
- 29157030
- Category
- Oils, Fats & Waxes