Methylisothiazolinone

Chemical Formula:

C₄H₅NOS

CAS Number:

2682-20-4, 7732-18-5

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Methylisothiazolinone

Chemical Formula:

C₄H₅NOS

CAS Number:

2682-20-4, 7732-18-5

Methylisothiazolinone (MIT) is a synthetic preservative commonly used in personal care, household, and industrial products. It provides broad-spectrum antimicrobial activity, protecting formulations against bacteria, fungi, and yeast. Supplied in aqueous solution with stabilizers, it is highly effective in low concentrations. Its strong preservation capacity makes it a preferred choice in rinse-off and select leave-on formulations.

Characteristics

Molar Weight

115.15 g/mol

Melting Point

-0.4 °C (approx., pure compound)

Boiling Point

~155 °C (decomposes)

Solubility

Miscible with water

Density

~1.02 g/cm³ (aqueous solution)

Forms

Clear to pale yellow aqueous solution

Odor

Mild, characteristic odor

USES AND APPLICATIONS

Key applications

Used as preservative in cosmetics and toiletries.
Applied in household cleaning formulations for stability.
Provides antimicrobial action in industrial products.
Used in rinse-off formulations like shampoos.
Helps extend shelf life of products.

Industries

Cosmetics
Personal Care
Household Products
Industrial Applications
Pharmaceuticals

Synonyms

MIT, 2-Methyl-4-isothiazolin-3-one, 2-Methylisothiazol-3(2H)-one

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