Overview
Emulsifier SG, chemically known as sorbitan monostearate or Span 60, is a non-ionic surfactant derived from sorbitol and stearic acid. It is widely used in industries requiring oil-in-water or water-in-oil emulsions. Its primary function is to reduce surface tension between immiscible liquids, making it indispensable in food, cosmetics, and pharmaceutical formulations. The compound is classified as Generally Recognized as Safe (GRAS) by regulatory bodies like the FDA, ensuring its suitability for edible products. Its versatility and stability under varying pH and temperature conditions contribute to its broad adoption across sectors.
Physical and Chemical Properties
Emulsifier SG appears as a waxy solid with a creamy white to pale yellow hue. It has a molecular weight of 430.62 g/mol and a melting point range of 52-54°C. The compound is hydrophobic, with an HLB (Hydrophile-Lipophile Balance) value of approximately 4.7, indicating its affinity for oil-phase stabilization. Its solubility profile includes miscibility with organic solvents like ethanol and chloroform, while remaining insoluble in water. This property makes it ideal for formulations where water resistance is desired. The density is around 1.0 g/cm³, and it exhibits stability under normal storage conditions.
Main Applications
In the food industry, Emulsifier SG is used in baked goods, dairy products, and confectionery to improve texture and shelf life. It acts as a dough conditioner and prevents staling in bread. Cosmetic formulations leverage its emulsifying capabilities in creams, lotions, and makeup products to ensure smooth consistency. The pharmaceutical sector employs it as an excipient in tablets and ointments for controlled drug release. Industrial applications include lubricants, textile processing, and pesticide formulations, where it enhances dispersion and adhesion properties.
Safety and Storage
Emulsifier SG is non-toxic and safe for consumption within regulated limits. However, prolonged exposure to dust or aerosols may cause mild respiratory irritation, necessitating proper ventilation during handling. Storage recommendations include keeping the product in tightly sealed containers at room temperature, away from moisture and direct sunlight. For bulk storage, polyethylene or stainless-steel containers are preferred to prevent contamination. Users should adhere to Material Safety Data Sheet (MSDS) guidelines for spillage and disposal procedures to minimize environmental impact.
B2B Procurement Guide
When sourcing Emulsifier SG, prioritize suppliers who provide certificates of analysis (CoA) detailing purity, CAS number, and compliance with relevant standards (e.g., FCC for food-grade applications). Bulk buyers should negotiate pricing based on volume, with typical prices ranging between $5-$15 per kg, depending on purity and supplier location. Consider suppliers with ISO or GMP certifications to ensure quality consistency. For international procurement, verify shipping conditions to prevent melting or degradation during transit. Sample testing is recommended to confirm product suitability before large-scale orders.
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