Product overview
Product Name: Sorbitan Monolaurate
Common Name: Span 20
CAS Number: 1338-39-2
EINECS Number: 215-663-3
Molecular Formula: C18H34O6
Molecular Weight: 346.46 g/mol
Brief Introduction:
Sorbitan Monolaurate, also known as Span 20, is a nonionic surfactant derived from the esterification of sorbitol with lauric acid.
It is commonly used as a water-in-oil (W/O) emulsifier in food, cosmetics, pharmaceuticals, and industrial applications.
Span 20 offers good emulsifying, dispersing, and wetting properties, making it suitable for formulations requiring stability and mildness.
Molecular diagram:
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Type: Nonionic surfactant
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Structure:
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Sorbitan (sugar alcohol) ring as hydrophilic head
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Lauric acid (C12) as lipophilic tail
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Single ester bond between sorbitan and fatty acid
HLB Value: ~8.6
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Indicates low water solubility
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Suitable for water-in-oil (W/O) emulsions
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Features:
Sorbitan Monolaurate is a light yellow to amber viscous liquid or paste at room temperature with a characteristic odor. It is a nonionic surfactant composed of a sorbitan ring esterified with lauric acid, forming an amphiphilic molecule that can reduce surface tension and stabilize emulsions. It is slightly soluble in isopropanol, tetrachloroethylene, xylene, cottonseed oil, and mineral oil; sparingly soluble in liquid paraffin; and insoluble in water. When dispersed in water, it forms a milky emulsion. Thanks to its unique molecular structure and solubility characteristics, it exhibits multiple functional properties.
- Emulsifying (especially for W/O emulsions)
- Lubricating
- Stabilizing agent
- Antifoaming/Defoaming action
Specifications:
| Test Item | Unit | Minimum Value | Maximum Value |
|---|---|---|---|
| Saponification value | mg KOH/g | 155 | 170 |
| Hydroxyl value | mg KOH/g | 330 | 360 |
| Acid value | mg KOH/g | — | 7 |
| Moisture | % | — | 1.5 |
| Fatty acid content | w% | 56 | 68 |
| Polyol content | w% | 36 | 49 |
| Ash residue (on ignition) | w% | — | 0.5 |
| Sulfur (S) | mg/kg | — | 3 |
| Lead (Pb) | mg/kg | — | 2 |
Applications:
Sorbitan Monolaurate (Span 20) is widely used in multiple industries due to its emulsifying, lubricating, stabilizing, and defoaming properties. It works well in water-in-oil emulsions and provides excellent compatibility with other nonionic surfactants. Its mild nature and versatility make it a preferred ingredient in formulations requiring stability and safety.
Food Industry – Emulsification & Stability
Used as a food-grade emulsifier in margarine, dairy products, and sauces. Helps prevent oil-water separation, improves product texture, and enhances shelf stability.
Cosmetics & Personal Care – Mild & Moisturizing
Applied in creams, lotions, and makeup removers to create smooth and stable emulsions. Its mild, non-irritating nature makes it suitable for sensitive skin formulations.
Pharmaceuticals – Drug Delivery & Stability
Used in ointments, creams, and oral suspensions. Assists in emulsifying oil-based active ingredients and improving the consistency and bioavailability of formulations.
Storage & Package:
Storage:
Store in a cool, dry, and well-ventilated area, away from direct sunlight and sources of heat. Avoid contact with harmful or incompatible substances. Handle with care during transportation to prevent leakage or contamination.
Transportation：
Transport as a general chemical product, following standard safety and handling procedures. Handle with care to prevent leakage or contamination.
Package:
Sorbitan Monolaurate is packed in high-quality PE drums with double-seal lids. Standard packaging sizes include 25kg/drum, 200kg/drum, and 1000kg IBC tote to meet different usage needs.
25L Square HDPE Drum
200L HDPE Open Top Drum
