Is Polysorbate 40 vegan?
Polysorbate 40
Polysorbate 40 (E434) is a nonionic surfactant and emulsifier produced by ethoxylation of sorbitan monopalmitate. The sorbitan is derived from plant-based sorbitol, while the palmitic acid component may originate from palm oil (plant) or animal fats. It is used as an emulsifier in food and pharmaceutical applications.
Why unconfirmed?
Polysorbate 40 can be either derived from animal, or non-animal sources. The ingredient name itself is identical either way, so the label alone can’t tell you which. Only a supplier declaration can.
| Also known as | PEG-20 sorbitan monopalmitate, POE (20) sorbitan monopalmitate, Polyoxyethylene (20) sorbitan monopalmitate, Polyoxyethylene sorbitan monopalmitate, Tween 40 |
|---|---|
| INCI name | Polysorbate 40 |
| E number | E434 |
| INS number | 434 |
| CAS number | 9005-66-7 |
| CosIng ID | 79320 |
| Last verified | 14 May 2026 |
An ingredient is considered vegan if it contains no animal-derived components at any point in its production.
Selling a product with this ingredient? A supplier declaration can confirm the source. See how certification works.
Classifications are made to the best of our knowledge based on available scientific and regulatory sources. We cannot guarantee the accuracy of every entry, errors in the sources we draw from can always occur. This tool also cannot account for cross-contamination, which depends entirely on individual suppliers and producers. If you believe a classification is incorrect, you can report an issue.
