Methylisothiazolinone. 2419
Methylisothiazolinone. 2419
MET
2/10
Concern level
Low concern
Methylisothiazolinone (MI) is a broad-spectrum preservative used to inhibit bacterial and fungal growth in cosmetics and personal-care products. It is effective at very low concentrations but is also a well-established contact allergen, which has led to major use restrictions in many markets.
Pore-clogging
Non-comedogenic
Pregnancy
Safe
Regulatory
No data
Benefits
Antiseptic
Concerns
Allergen
Chemical Properties
Molecular Weight
115.16 g/mol pH Range
4.00 - 8.00Typical Concentration
0.00% - 0.01%CAS Number: 2682-20-4
Skin Type Compatibility
dry skin2/10
oily skin2/10
sensitive skin0/10
acne prone3/10
mature skin2/10
normal skin3/10
Interactions
incompatible with: fragrance, essential oils, other common sensitizers
Risks & Warnings
High risk of allergic contact dermatitis and sensitization, especially with leave-on exposure or frequent repeated use. Can cause irritation to eyes and skin. Not appropriate for many sensitive-skin users and should be minimized or avoided in products intended for prolonged skin contact.
Vegan Cruelty-Free
