Sodium Lauryl Sulfate
INCI: SODIUM LAURYL SULFATE
Also known as: SLS, Sodium Dodecyl Sulfate
Key Facts
- CAS Number
- 151-21-3
- Category
- surfactant
- Risk Level
- medium
- Common Allergen
- Yes
- Found In
- shampoo, toothpaste, body wash, facial cleanser
Is Sodium Lauryl Sulfate safe in cosmetics?
Sodium Lauryl Sulfate is rated medium risk in cosmetic products. It is a known allergen that can cause contact dermatitis in sensitized individuals. Primary irritant, not a true allergen. Disrupts skin barrier allowing other allergens to penetrate. Safer alternatives include Decyl Glucoside, Coco Glucoside, Sodium Cocoyl Isethionate. Commonly found in shampoo, toothpaste, body wash.
What is Sodium Lauryl Sulfate?
Strong surfactant. Not a true allergen but a potent irritant that damages the skin barrier.
Allergy & Safety Information
Sodium Lauryl Sulfate is generally safe for most people but may cause irritation or allergic reactions in sensitive individuals. If you experience redness, itching, or swelling after using a product with this ingredient, discontinue use and consult a dermatologist.
Cross-Reactions
If you react to Sodium Lauryl Sulfate, you may also react to:
Safer Alternatives
These ingredients serve a similar function with lower allergy risk:
Frequently Asked Questions
Is Sodium Lauryl Sulfate safe for sensitive skin?
Sodium Lauryl Sulfate may cause reactions in some sensitive individuals. Patch testing is advisable.
What products contain Sodium Lauryl Sulfate?
Sodium Lauryl Sulfate is commonly found in shampoo, toothpaste, body wash, facial cleanser.
What does Sodium Lauryl Sulfate do in cosmetics?
Sodium Lauryl Sulfate functions as a surfactant in formulations. Primary irritant, not a true allergen. Disrupts skin barrier allowing other allergens to penetrate.
Related Guides
Top 10 Cosmetic Allergens
Is Sodium Lauryl Sulfate on the list? See the full clinical ranking.
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 Sodium Lauryl Sulfate causing YOUR skin reactions?
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