Tristearin (CAS: 555-43-1): Properties, Applications, and Industrial Uses
Overview
Tristearin, also known as glyceryl tristearate or glycerol tristearate, is a triglyceride derived from stearic acid. Its chemical formula is C₅₇H₁₁₀O₆, and it appears as a white, waxy solid at room temperature. Tristearin is a key member of the ester family and is widely used in industrial and chemical applications due to its stability, hydrophobic nature, and compatibility with other non-polar substances.
Chemical and Physical Properties
– CAS Number: 555-43-1
– Molecular Formula: C₅₇H₁₁₀O₆
– Molar Mass: 891.5 g/mol
– Appearance: White to off-white crystalline solid
– Melting Point: Approximately 73°C (163°F)
– Solubility: Insoluble in water; soluble in organic solvents such as chloroform, ether, and benzene
– Odor: Odorless
Synthesis and Production
Tristearin is typically synthesized through the esterification of glycerol with stearic acid. This process can be catalyzed using acid or base catalysts and results in the formation of this stable triglyceride. It can also be obtained through fractionation of natural fats and oils rich in stearic acid.
Industrial Applications
1. Cosmetic and Personal Care Products
Tristearin functions as a thickening agent and opacifier in formulations like lotions, creams, and balms. It helps stabilize emulsions and imparts a smooth, spreadable texture to products such as moisturizers and makeup.
2. Plastics and Polymer Manufacturing
Due to its lubricating and anti-static properties, tristearin is used as a slip agent and mold release agent in plastic processing. It reduces friction between surfaces and improves the flow of plastic materials during extrusion and molding.
3. Lubricants and Greases
In industrial lubricants and greases, tristearin contributes to thermal stability and high-pressure performance. It is particularly valued in applications requiring biodegradable or environmentally friendly formulations.
4. Textile and Leather Processing
Tristearin is employed as a softening and conditioning agent in textile manufacturing. In leather processing, it enhances the flexibility and water resistance of the final product.
5. Candle and Wax Formulations
Thanks to its high melting point and clean-burning characteristics, tristearin is often used in candle production to improve hardness, opacity, and burn quality.
6. Pharmaceutical Applications (Non-edible)
Tristearin may be used as a binder or lubricant in tablet manufacturing. It assists in the compaction process and helps ensure uniform release of active ingredients in solid dosage forms.
Environmental and Safety Considerations
Tristearin is considered non-toxic and biodegradable, making it an environmentally friendly option for various applications. However, as with any chemical substance, proper handling and storage are essential. Protective equipment should be used when dealing with large quantities to avoid skin or eye contact.
Conclusion
Tristearin (CAS: 555-43-1) is a versatile and valuable triglyceride with a broad range of applications outside the food industry. Its chemical stability, lubricating properties, and compatibility with various formulations make it a staple ingredient in cosmetics, plastics, textiles, and industrial processes. As demand for sustainable and biodegradable materials grows, tristearin continues to offer practical solutions across multiple sectors.
City Chemical LLC is a top producer of chemicals like: Tristearin (CAS #: 555-43-1).
Visit City Chemical at www.citychemical.com.