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Home/Ingredient Guide/Methylisothiazolinone
Ingredient guide

Methylisothiazolinone.

Also known as: MIT, MI, methylisothiazolinone, Neolone 950

A powerful synthetic biocide and preservative.

Regulations

Global status.

How methylisothiazolinone is regulated in cosmetics around the world.

Restricted in 9Allowed in 1No data for 1

90% of countries with data ban or restrict this ingredient

🇺🇸USA
Allowed
🇪🇺EU
Restricted
Details

Banned in leave-on products since 2017; max 0.0015% in rinse-off only.

🇬🇧UK
Restricted
Details

Mirrors EU; banned in leave-on; max 0.0015% in rinse-off.

🇨🇦Canada
Restricted
Details

Banned in leave-on; limited in rinse-off products.

🇯🇵Japan
Restricted
Details

Permitted with limits under MHLW positive list.

🇰🇷S. Korea
Restricted
Details

Banned in leave-on; max 0.0015% in rinse-off.

🇦🇺Australia
Restricted
Details

Limits on leave-on products per NICNAS.

🇨🇳China
Restricted
Details

Banned in leave-on; max 0.01% in rinse-off per 2015 standards.

🇧🇷Brazil
Restricted
Details

ANVISA bans in leave-on; rinse-off max 0.0015%.

🇮🇳India
No Data
🌏ASEAN
Restricted
Details

Banned in leave-on; max 0.0015% in rinse-off, aligned with EU.

Why it’s used

The reason brands include it.

Other manufacturers use it as an antimicrobial preservative, especially in water-based formulations.

1

products in our database

1

brands use it

1

product categories

Categories

Methylisothiazolinone in product types.

Click a category to see every product containing methylisothiazolinone.

Alternatives

Common alternatives.

potassium sorbate
sodium benzoate
ethylhexylglycerin
rosemary extract

What Numbrrrz uses

Numbrrrz does not use methylisothiazolinone. Every tube is organic coconut oil, organic beeswax, organic jojoba oil and vitamin E, plus organic essential oils or flavoring in the scented versions.

Questions

Quick answers.

What is Methylisothiazolinone?
A powerful synthetic biocide and preservative.
Why is Methylisothiazolinone used in cosmetics?
Other manufacturers use it as an antimicrobial preservative, especially in water-based formulations.
How is Methylisothiazolinone regulated?
Still permitted in US cosmetics with no concentration limits. Not banned despite international restrictions. It is not permitted in cosmetics sold in the EU. Canada restricts its use in cosmetics.
Does Numbrrrz contain Methylisothiazolinone?
No. Numbrrrz is made from four base ingredients: organic coconut oil, organic beeswax, organic jojoba oil and vitamin E, plus organic essential oils or flavoring in the scented versions. That is a formulation choice, not a judgment about other products.
Four base ingredients

Prefer a short label?

Organic coconut oil, organic beeswax, organic jojoba oil and vitamin E, in a 0.5 oz (14 g) USDA Organic tube.