Overview
Tristearin, also known by its CAS number 555-43-1, is a triglyceride composed of three stearic acid molecules esterified with a glycerol backbone. It appears as a white, waxy solid at room temperature and is commonly used in a variety of industrial applications due to its physical stability, hydrophobicity, and biodegradability.
Chemical Structure and Properties
– Molecular Formula: C57H110O6
– Molecular Weight: 891.48 g/mol
– Appearance: White to off-white solid or powder
– Melting Point: Approximately 72–74°C
– Solubility: Insoluble in water; soluble in organic solvents such as ethanol, benzene, and chloroform
Applications Outside of Food Use
1. Cosmetic and Personal Care Products
Tristearin is used in formulations for skincare and cosmetic products as an emollient, thickening agent, and opacifier. It contributes to the creamy consistency and enhances the stability of creams, lotions, and balms.
2. Pharmaceuticals
In the pharmaceutical industry, Tristearin is employed as a matrix material in controlled-release drug delivery systems. Its hydrophobic nature allows it to slow the release of active pharmaceutical ingredients, enabling sustained delivery over time.
3. Lubricants and Mold Release Agents
Tristearin serves as a biodegradable and non-toxic additive in industrial lubricants and mold release agents, especially in plastic and rubber manufacturing. It helps reduce friction, improve flow, and prevent sticking during processing.
4. Plastic and Polymer Manufacturing
It is used as a slip agent or processing aid in the production of polymers and plastics. Tristearin can enhance moldability and prevent agglomeration in the production of materials like polyethylene and polypropylene.
5. Candles and Wax Products
Due to its waxy texture and high melting point, Tristearin is a key component in the formulation of candles and other wax-based products. It helps create a harder, longer-lasting burn and is valued for its smooth finish.
6. Textile and Leather Processing
In textile and leather industries, Tristearin is used as a softening and finishing agent. It enhances the suppleness of treated materials and can impart water-repellent properties when combined with other agents.
Environmental and Safety Considerations
Tristearin is considered non-toxic, biodegradable, and environmentally friendly. It poses minimal risk under standard handling conditions but, like other chemical substances, should be used with proper safety protocols, especially in industrial settings.
Conclusion
Tristearin (CAS: 555-43-1) is a versatile compound with a broad range of non-food applications. Its chemical stability, compatibility with organic materials, and environmentally safe profile make it valuable across several industries, from pharmaceuticals to manufacturing and cosmetics.
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