Polysorbate 20 — Allergy Risk & Safety Profile
INCI: POLYSORBATE 20
Also known as: Tween 20
Key Facts
- CAS Number
- 9005-64-5
- Category
- surfactant
- Risk Level
- low
- Common Allergen
- No
- Found In
- toner, micellar water, serum
Is Polysorbate 20 safe in cosmetics?
Polysorbate 20 is rated low risk in cosmetic products. It is not classified as a common allergen and is generally well-tolerated by most skin types. Safer alternatives include Decyl Glucoside, Coco Glucoside, Sodium Cocoyl Isethionate. Commonly found in toner, micellar water, serum.
What is Polysorbate 20?
Polysorbate 20 is a surfactant commonly used in cosmetic and personal care products. It is generally considered safe for use in cosmetics at recommended concentrations.
Allergy & Safety Information
Polysorbate 20 is considered safe for cosmetic use. No significant safety concerns have been identified at typical use concentrations. As with any cosmetic ingredient, discontinue use if irritation occurs.
This ingredient is considered low risk from an allergenicity perspective. Reactions are uncommon at typical cosmetic use concentrations. However, no ingredient is universally safe — if you notice redness, itching, or irritation after using a product containing this ingredient, discontinue use and monitor whether symptoms resolve.
About Surfactant / Cleansing Agent Ingredients
Surfactants reduce surface tension between water and oil, allowing products to cleanse, foam, and emulsify. They are essential in shampoos, cleansers, and body washes. However, surfactants vary widely in irritation potential — from harsh (sodium lauryl sulfate) to very mild (sodium lauroyl sarcosinate, decyl glucoside).
Relevance for Polysorbate 20: Repeated daily use of strong surfactants disrupts the skin barrier by removing natural lipids, increasing sensitivity to other allergens over time. If you have reactive or eczema-prone skin, choosing low-irritation surfactants and limiting wash time reduces barrier damage.
How to Identify Polysorbate 20 in Products
Cosmetic ingredients are listed by their INCI (International Nomenclature of Cosmetic Ingredients) name in descending order of concentration. To check whether a product contains Polysorbate 20, scan the ingredient list for its INCI name exactly as it appears above. Ingredients present at 1% or less may appear in any order after the 1% threshold.
Product types to prioritise checking: Toner, Micellar water, Serum. These product categories are the most common sources of Polysorbate 20 exposure based on formulation data.
Not sure if your products contain Polysorbate 20? Paste the ingredient list into the free ingredient checker to scan for Polysorbate 20 and other allergens automatically.
Safer Alternatives
These ingredients serve a similar function with lower allergy risk:
Frequently Asked Questions
Is Polysorbate 20 safe for sensitive skin?
Polysorbate 20 is generally well-tolerated, even by sensitive skin types.
What products contain Polysorbate 20?
Polysorbate 20 is commonly found in toner, micellar water, serum.
What does Polysorbate 20 do in cosmetics?
Polysorbate 20 functions as a surfactant in formulations.
Related Guides
Sulfates in Skincare & Shampoo
Which surfactants damage the barrier and safer alternatives.
How to Read Ingredient Labels
Decode INCI names and find hidden allergens in your products.
Find Your Skin Allergy Trigger
Step-by-step elimination method to identify your trigger.
Contact Dermatitis Guide
Symptoms, causes, patch testing, and treatment options.
Is Polysorbate 20 causing YOUR skin reactions?
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