Steareth-2 — Allergy Risk & Safety Profile
INCI: STEARETH-2
Key Facts
- CAS Number
- 9005-00-9
- Category
- emulsifier
- Risk Level
- low
- Common Allergen
- No
- Found In
- cream
Is Steareth-2 safe in cosmetics?
Steareth-2 is rated low risk in cosmetic products. It is not classified as a common allergen and is generally well-tolerated by most skin types. Commonly found in cream.
What is Steareth-2?
Steareth-2 is a emulsifier commonly used in cosmetic and personal care products. It is generally considered safe for use in cosmetics at recommended concentrations.
Allergy & Safety Information
Steareth-2 is considered safe for cosmetic use at typical concentrations.
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 Emulsifier Ingredients
Emulsifiers allow oil and water to mix stably in a formulation, creating creams and lotions. They work by surrounding oil droplets with molecules that are compatible with both water and oil. Most emulsifiers have low sensitisation rates, but some — particularly PEG-derived emulsifiers — can be problematic for barrier-compromised skin.
Relevance for Steareth-2: Emulsifiers can disrupt the skin's own lipid barrier through a process called emulsification of skin lipids. For very sensitive or eczema-prone skin, emulsifier-free moisturisers (ointments, oils) are sometimes better tolerated than emulsion-based creams.
How to Identify Steareth-2 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 Steareth-2, 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: Cream. These product categories are the most common sources of Steareth-2 exposure based on formulation data.
Not sure if your products contain Steareth-2? Paste the ingredient list into the free ingredient checker to scan for Steareth-2 and other allergens automatically.
Frequently Asked Questions
Is Steareth-2 safe for sensitive skin?
Steareth-2 is generally well-tolerated, even by sensitive skin.
What products contain Steareth-2?
Steareth-2 is commonly found in cream.
What does Steareth-2 do in cosmetics?
Steareth-2 functions as a emulsifier in formulations.
Related Guides
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