Polysorbate 40
Description
Polysorbate 40 (CAS 9005-66-7), also identified as E434 in food regulatory frameworks, is a polyoxyethylene sorbitan ester derived from palmitic acid. It functions as a nonionic emulsifier and solubilizer across food, cosmetic, and pharmaceutical manufacturing.
This versatile chemical stabilizes oil-in-water systems where consistent texture and phase compatibility are critical procurement requirements. In food production, it emulsifies fat-containing products such as ice cream, baked goods, and salad dressings.
The additive prevents separation during processing and shelf life, ensuring product integrity. Pharmaceutical formulators use it to solubilize poorly water-soluble active ingredients in oral liquids, topical preparations, and injectable formulations.
Personal care manufacturers incorporate it into creams and lotions to maintain stable emulsions and improve the spreadability of oil-phase ingredients. This helps achieve the desired sensory profile for high-end cosmetic applications.
In industrial cleaning concentrates, it supports the dispersion of hydrophobic soils and improves the compatibility of fragrance or active components within aqueous systems. This makes it a valuable component for heavy-duty formulations.
The product is supplied as a viscous amber liquid for easy handling in industrial settings. Standard grades include food-grade, USP/NF, and Ph.Eur., supporting regulatory compliance across multiple global end markets.
These quality standards ensure the material meets the rigorous safety and purity requirements of the healthcare and nutrition sectors. Bulk supply is typically available in drums and intermediate bulk containers (IBCs).
Physical Properties
| Melting Point | 0.1 °C |
| Boiling Point | 797.89°C (rough estimate) |
| Density | 1.10 g/cm³ |
| Flash Point | >230 °F |
| Appearance | Yellow to amber liquid |
| Color | Light yellow to Yellow to Orange |
| Form | viscous liquid |
| Water Solubility | 100 g/L |
| Refractive Index | n 20/D 1.47(lit.) |
Trade & Regulatory
| HS Code | 34021300 |
| Storage Class | 10 - Combustible liquids |
| WGK (Germany) | 1 |
Documentation
Other Names
Sorbitan, monohexadecanoate, poly(oxy-1,2-ethanediyl) derivs.|Sorbitan, monopalmitate, polyoxyethylene derivs.|Polyoxyethylene sorbitan monopalmitate|Tween 40|E434
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