Benzisothiazolinone
INCI: BENZISOTHIAZOLINONE
Key Facts
- CAS Number
- 2634-33-5
- Category
- preservative
- Risk Level
- high
- Common Allergen
- Yes
- Found In
- shampoo, cleaning products
Is Benzisothiazolinone safe in cosmetics?
Benzisothiazolinone is rated high risk in cosmetic products. It is a known allergen that can cause contact dermatitis in sensitized individuals. Safer alternatives include Phenoxyethanol, Sodium Benzoate, Potassium Sorbate. Commonly found in shampoo, cleaning products.
What is Benzisothiazolinone?
Isothiazolinone preservative similar to MI. Increasing sensitization rates.
Allergy & Safety Information
Benzisothiazolinone is classified as a high-risk ingredient. It is a known cause of allergic contact dermatitis. Individuals with sensitive skin or a history of contact allergies should avoid products containing this ingredient. A patch test is recommended before first use of any product containing Benzisothiazolinone.
Cross-Reactions
If you react to Benzisothiazolinone, you may also react to:
Safer Alternatives
These ingredients serve a similar function with lower allergy risk:
Frequently Asked Questions
Is Benzisothiazolinone safe for sensitive skin?
Benzisothiazolinone is a known allergen and is generally not recommended for sensitive skin. Consider patch testing before use.
What products contain Benzisothiazolinone?
Benzisothiazolinone is commonly found in shampoo, cleaning products.
What does Benzisothiazolinone do in cosmetics?
Benzisothiazolinone functions as a preservative in formulations.
Related Guides
Top 10 Cosmetic Allergens
Is Benzisothiazolinone on the list? See the full clinical ranking.
Preservative Allergy Guide
Which preservatives cause the most reactions and what to use instead.
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 Benzisothiazolinone 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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