Iron(III) stearate

Updated: 2026-08-07

Overview

Iron stearate, also known as ferric stearate, is a metal soap derived from stearic acid and iron. It is widely used in industrial applications due to its lubricating, stabilizing, and hydrophobic properties. The compound is typically available as a pale yellow to brown powder and is insoluble in water but soluble in organic solvents. Iron stearate is primarily utilized in the plastics and rubber industries, where it acts as a thermal stabilizer and lubricant. Its ability to repel water also makes it a valuable additive in paints and coatings. The compound is synthesized through the reaction of stearic acid with iron salts, resulting in a product with consistent performance across various applications.

Physical and Chemical Properties

Iron stearate exhibits several notable physical and chemical properties that make it suitable for industrial use. It has a melting point of approximately 120-130°C and is insoluble in water, though it dissolves readily in organic solvents like ethanol and acetone. The compound is stable under normal conditions but may decompose when exposed to strong acids or oxidizers. Its hydrophobic nature makes it an effective waterproofing agent, while its lubricating properties reduce friction in polymer processing. Iron stearate also acts as a thermal stabilizer, preventing degradation of materials at high temperatures. These properties are critical for its performance in plastics, rubber, and coatings, where durability and stability are essential.

Main Applications

Iron stearate is widely used in the plastics industry as a lubricant and thermal stabilizer. It helps improve the processing of polymers by reducing friction and preventing thermal degradation. In rubber manufacturing, it serves as a release agent and stabilizer, enhancing the quality and longevity of rubber products. The compound is also employed in paints and coatings for its waterproofing capabilities. Additionally, iron stearate finds applications in cosmetics and pharmaceuticals, where it acts as a thickening agent and emulsifier. Its versatility and effectiveness make it a valuable additive across multiple industries, contributing to product performance and durability.

Safety and Storage

Iron stearate should be handled with care to ensure safety. Avoid inhalation of dust and direct skin contact by using appropriate personal protective equipment (PPE), such as gloves and masks. The compound is generally stable but may pose risks if ingested or inhaled in large quantities. Storage conditions are crucial for maintaining the quality of iron stearate. It should be kept in a cool, dry place away from oxidizers and strong acids. Properly sealed containers are recommended to prevent moisture absorption and contamination. Always follow local regulations and safety guidelines when handling and storing this chemical.

B2B Procurement Guide

When procuring iron stearate, B2B buyers should consider several factors to ensure quality and reliability. Verify the purity and specifications of the product, as these can vary between suppliers. Packaging options, such as bulk bags or drums, should align with your storage and handling capabilities. Supplier certifications, such as ISO or GMP, are indicators of quality and compliance. Pricing can vary based on quantity and market conditions, so obtaining multiple quotes is advisable. Additionally, inquire about lead times and logistics to ensure timely delivery. Establishing long-term relationships with reputable suppliers can provide consistency and competitive pricing.