Dimethicone — Allergy Risk & Safety Profile
INCI: DIMETHICONE
Also known as: Polydimethylsiloxane, PDMS
Key Facts
- CAS Number
- 9006-65-9
- Category
- emollient
- Risk Level
- low
- Common Allergen
- No
- Found In
- moisturizer, primer, hair serum, foundation
Is Dimethicone safe in cosmetics?
Dimethicone 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 Squalane, Jojoba Oil, Shea Butter. Commonly found in moisturizer, primer, hair serum.
What is Dimethicone?
Silicone-based emollient that creates a smooth, protective barrier. Non-comedogenic despite common myths.
Allergy & Safety Information
Dimethicone 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 Emollient Ingredients
Emollients soften and smooth skin by filling gaps between skin cells and reducing transepidermal water loss. They form the backbone of most moisturisers, creams, and lotions. Most emollients are well-tolerated, but some — particularly plant-derived oils — contain proteins or compounds that can cause reactions in sensitised individuals.
Relevance for Dimethicone: Emollients derived from nuts (shea butter, macadamia oil), latex cross-reactive fruits (avocado oil), or highly fragrant plants (rosehip, sea buckthorn) carry higher allergenicity than refined synthetic emollients like squalane or dimethicone.
How to Identify Dimethicone 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 Dimethicone, 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: Moisturizer, Primer, Hair serum, Foundation. These product categories are the most common sources of Dimethicone exposure based on formulation data.
Not sure if your products contain Dimethicone? Paste the ingredient list into the free ingredient checker to scan for Dimethicone and other allergens automatically.
Safer Alternatives
These ingredients serve a similar function with lower allergy risk:
Frequently Asked Questions
Is Dimethicone safe for sensitive skin?
Dimethicone is generally well-tolerated, even by sensitive skin types.
What products contain Dimethicone?
Dimethicone is commonly found in moisturizer, primer, hair serum, foundation.
What does Dimethicone do in cosmetics?
Dimethicone functions as a emollient in formulations.
Related Guides
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How ceramide moisturizers repair the skin barrier.
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 Dimethicone causing YOUR skin reactions?
SkinDetekt tracks your products and reactions to find your personal triggers. Download the app to find out.
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