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Cosmetic ingredient (INCI)

Methylisothiazolinone

Used in cosmetic products as preservative. Methylisothiazolinone is a heterocyclic organic compound.

Listed in several EU annexes
  • Allowed preservative, Annex V/39
  • Allowed preservative, Annex V/57

Annex V/39: 0.0015% (of a mixture in the ratio 3:1 of 5-Chloro-2-methyl-isothiazol-3(2H)-one and 2-Methylisothiazol-3(2H)-one | Annex V/57: 0,0015 % Rinse-off products

The chemical behind this ingredient

Structure, properties, safety data and price information live on the chemical page.

Methylisothiazolinone chemical structure, C4H5NOS, CAS 2682-20-4
Methylisothiazolinone
CAS 2682-20-4C4H5NOS
84 suppliers
Methylisothiazolinone

IUPAC name: 2-methyl-1,2-thiazol-3-one

  • 2D structure and identifiers
  • Measured and computed properties
  • GHS safety summary
  • Suppliers, prices and trade data

Methylisothiazolinone suppliers

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Frequently asked questions

What is Methylisothiazolinone used for in cosmetics?

Methylisothiazolinone is used in cosmetic products as preservative. Methylisothiazolinone is a heterocyclic organic compound.

Is Methylisothiazolinone restricted in cosmetics in the EU?

Methylisothiazolinone is listed in the annexes of EU Cosmetics Regulation (EC) No 1223/2009: Annex V/39 (allowed preservative), Annex V/57 (allowed preservative). Annex V/39: 0.0015% (of a mixture in the ratio 3:1 of 5-Chloro-2-methyl-isothiazol-3(2H)-one and 2-Methylisothiazol-3(2H)-one | Annex V/57: 0,0015 % Rinse-off products Always check the full annex entry for the conditions of use.

What is the CAS number of Methylisothiazolinone?

Methylisothiazolinone is listed with CAS number 2682-20-4 and EC number 220-239-6.

Where can I buy Methylisothiazolinone?

8 suppliers list Methylisothiazolinone on CompoundList. Compare them below or post a buy request with your grade and quantity.