overview
Common Name: Tween 40 / Polyoxyethylene (20) sorbitan monopalmitate
CAS Number: —
EINECS Number: —
Molecular Formula: —
Molecular Weight: —
Polysorbate 40 (Tween 40) is a nonionic surfactant formed by ethoxylation of sorbitan monopalmitate. It is widely used as an emulsifier and stabilizer in food, personal care, and pharmaceutical products. Polysorbate 40 improves miscibility between polar and nonpolar components, enhances texture and spreadability in topical products, and aids in forming clear, stable liquid formulations.
Molecular structure description
Hydrophilic part: Polyoxyethylene (20) sorbitan head group
HLB value: ~14.9 (hydrophilic, suited for oil-in-water emulsions)
Specifications
It is a nonionic surfactant composed of polyoxyethylene (20) sorbitan esterified with palmitic acid, creating an amphiphilic molecule with strong oil-in-water emulsifying capability.
It is soluble in water, ethanol, and isopropanol; slightly soluble in vegetable oils; and insoluble in mineral oil.
When dispersed in water, it forms clear to slightly opalescent solutions. Due to its stability and emulsifying efficiency, it is often used in food, cosmetics, and pharmaceutical formulations.
| Test Item | Unit | Min Value | Max Value |
|---|---|---|---|
| Saponification Value | mgKOH/g | 41 | 52 |
| Iodine Value | mgKOH/g | 90 | 107 |
| Acid Value | mgKOH/g | — | 2 |
| Moisture | % | — | 3 |
| Ignition Residue | w% | — | 0.25 |
| Ethylene Oxide | w% | 70 | 70.5 |
| Lead | mg/kg | — | 2 |
Applications
It is effective in oil-in-water emulsions and works well with saturated fats and oils.
Its stability over a wide temperature range makes it a preferred choice for heat-processed products.
Emulsification Efficiency – Stable W/O Emulsions
Sorbitan esters are highly effective in forming stable water-in-oil emulsions. Ideal for margarine, creams, and ointments, they help maintain consistency and prevent separation over time.
Mild & Skin-Friendly – Ideal for Cosmetics
Widely used in lotions, creams, and makeup products, sorbitan esters are non-irritating and suitable for sensitive skin. They provide smooth textures and enhance product stability.
Food Grade & Safe – Emulsifiers for Processing
Approved for food use, they act as emulsifiers in sauces, dairy products, and spreads. Improve mouthfeel, extend shelf life, and maintain homogeneity of processed foods.
Pharmaceutical Use – Enhances Drug Stability
Used in medicinal creams, gels, and suspensions, sorbitan esters help deliver oil-soluble actives effectively. They improve bioavailability and ensure long-term formulation stability.
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.
Package:
Polysorbate 40 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.
25 Kg /drum
200kg/drum
