Overview
Span 80, chemically known as Sorbitan Monooleate, is a nonionic surfactant derived from sorbitol and oleic acid. It is part of the Span series of emulsifiers, which are widely utilized in industries requiring stable oil-in-water or water-in-oil emulsions. Its versatility and safety profile make it a staple in formulations ranging from creams to industrial lubricants. First introduced in the mid-20th century, Span 80 gained prominence due to its balanced hydrophilic-lipophilic properties. It is often paired with Tween surfactants (e.g., Tween 80) to achieve desired emulsion stability. Regulatory bodies like the FDA and EFSA approve its use in food and pharmaceutical applications, further solidifying its industrial relevance.
Physical and Chemical Properties
Span 80 is an amber-colored viscous liquid with a mild characteristic odor. Its molecular structure features a sorbitan backbone esterified with oleic acid, giving it an HLB value of approximately 4.3, which classifies it as lipophilic. This property makes it particularly effective in water-in-oil emulsions. The surfactant is soluble in most organic solvents, including ethanol and oils, but exhibits negligible solubility in water. Its stability under moderate temperatures and resistance to hydrolysis in acidic environments contribute to its reliability in formulations. However, prolonged exposure to high temperatures or strong alkalis may degrade its performance.
Main Applications
In the pharmaceutical industry, Span 80 serves as an emulsifier in topical creams, ointments, and vaccine adjuvants. Its ability to stabilize interfaces between immiscible phases is critical for drug delivery systems. Cosmetic formulations, such as lotions and makeup removers, also leverage its emulsifying properties. The food industry employs Span 80 as a dough conditioner and emulsifier in products like whipped toppings and confectioneries. Industrial applications include its use as a lubricant in textile manufacturing and a dispersant in pesticide formulations. Its multifunctionality across sectors underscores its importance in B2B supply chains.
Safety and Storage
Span 80 is classified as low-toxicity and is generally safe for use in regulated applications. However, direct contact with eyes or prolonged skin exposure should be avoided, as it may cause mild irritation. Proper personal protective equipment (PPE), such as gloves and goggles, is recommended during handling. Storage requires protection from extreme temperatures and moisture to prevent degradation. Ideal conditions include airtight containers in cool, dry environments. Bulk procurement should prioritize UV-resistant packaging to maintain product integrity during transportation and long-term storage.
B2B Procurement Guide
When procuring Span 80, buyers should prioritize suppliers with certifications like ISO, GMP, or food-grade compliance, depending on the intended use. Key documentation includes the Certificate of Analysis (COA) to verify purity (typically 95–99%) and traceability. Price negotiations often hinge on order volume, with discounts available for bulk purchases (e.g., drum or tote quantities). Lead times can vary, especially for specialty grades, so advance planning is advised. For international shipments, confirm compliance with regional regulations (e.g., REACH in the EU or FDA in the US) to avoid customs delays.
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