CosIng Checker
CosIng Checker
EU cosmetic ingredients, restrictions and safety
Login
Annex V Entry 39 28/09/2022

METHYLCHLOROISOTHIAZOLINONE AND METHYLISOTHIAZOLINONE

Mixture of 5-Chloro-2-methyl-isothiazol-3(2H)-one and 2-Methylisothiazol-3(2H)-one with magnesium chloride and magnesium nitrate

METHYLCHLOROISOTHIAZOLINONE AND METHYLISOTHIAZOLINONE appears in Annex V as a positive-list preservative entry for EU cosmetics. Maximum concentration in this record: 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.

Search similar Back to annex Compare
Permitted preservative— Annex V, EU Regulation 1223/2009
Max conc.: 0.0015% (of a mixture in the ratio 3:1 of 5-Chloro-2-m…
Entry: 39

Record details

Maximum concentration

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

Product type

Rinse-off

INCI glossary name

METHYLCHLOROISOTHIAZOLINONE AND METHYLISOTHIAZOLINONE

Chemical name

Mixture of 5-Chloro-2-methyl-isothiazol-3(2H)-one and 2-Methylisothiazol-3(2H)-one with magnesium chloride and magnesium nitrate

Chemical / IUPAC name

Mixture of 5-Chloro-2-methyl-isothiazol-3(2H)-one and 2-Methylisothiazol-3(2H)-one with magnesium chloride and magnesium nitrate

Regulatory information

Regulation

(EC) 2014/1003

SCCS opinions

Identified ingredients

Key data

CAS
26172-55-4, 2682-20-4, 55965-84-9
EC
247-500-7, 220-239-6
Annex
V
Entry number
39

Inventory links for METHYLCHLOROISOTHIAZOLINONE AND METHYLISOTHIAZOLINONE

Direct matches are limited for this record, so nearby entries from Annex V are shown as well.

Annex V 38
Nearby record in the same annex

O-CYMEN-5-OL

CAS: 3228-02-2
EC: 221-761-7
Annex V 34
Nearby record in the same annex

BENZYL ALCOHOL

CAS: 100-51-6
EC: 202-859-9
Annex V 33
Nearby record in the same annex

DMDM HYDANTOIN

CAS: 6440-58-0
EC: 229-222-8

What Annex V means for METHYLCHLOROISOTHIAZOLINONE AND METHYLISOTHIAZOLINONE

METHYLCHLOROISOTHIAZOLINONE AND METHYLISOTHIAZOLINONE is an approved preservative listed in Annex V of EU Cosmetics Regulation 1223/2009. Only substances on this positive list may be used as cosmetic preservatives in the EU.

Each preservative entry specifies maximum permitted concentrations and applicable product scope. Concentrations must not exceed the listed maximum. Some preservatives require warning statements on the product label.

This record is linked to 2 CosIng inventory ingredients for name and identifier cross-reference. The page also surfaces 12 related annex records with overlapping identifiers, annex logic or naming patterns.

Compliance checklist

  • Use concentration must not exceed: 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
  • Verify the preservative is effective at the permitted concentration for your matrix.

Frequently asked questions

Yes. METHYLCHLOROISOTHIAZOLINONE AND METHYLISOTHIAZOLINONE is listed in Annex V of EU Cosmetics Regulation 1223/2009 as a permitted preservative. It may be used in cosmetics up to the maximum concentration specified above, within the permitted product scope.

CAS 26172-55-4, 2682-20-4, 55965-84-9 is the unique numerical identifier assigned to METHYLCHLOROISOTHIAZOLINONE AND METHYLISOTHIAZOLINONE by the Chemical Abstracts Service. In cosmetic compliance work, the CAS number is used to cross-reference the substance across regulatory databases, raw material specifications and safety assessment reports. Multiple EU annex entries may share the same CAS number if the same substance appears under different conditions or in different annexes.

The maximum concentration of 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 applies to the concentration of the substance in the ready-to-use cosmetic product. When the substance is supplied as part of a blend or mixture, the calculation must account for the contribution of all sources in the formulation. The combined concentration must not exceed the stated limit.

Use the INCI Checker tool on this site to paste your full ingredient list (INCI) and scan it against all Annex II–VI entries. The tool highlights any ingredients that match restricted, prohibited or allergen-flagged records. This is useful for rapid compliance screening of finished product formulas or raw material declarations.
Open INCI Checker

Source note for Annex V record METHYLCHLOROISOTHIAZOLINONE AND METHYLISOTHIAZOLINONE

This page summarizes one Annex V record for METHYLCHLOROISOTHIAZOLINONE AND METHYLISOTHIAZOLINONE from public European Commission cosmetic materials and adds linked inventory or identifier matches when available.

Use this record page to review Annex V conditions for METHYLCHLOROISOTHIAZOLINONE AND METHYLISOTHIAZOLINONE, but confirm any final regulatory decision against the current official annex wording and source files.

View sourcesView updates

Tools & next steps

Check your formula

Paste a full INCI list to detect METHYLCHLOROISOTHIAZOLINONE AND METHYLISOTHIAZOLINONE and other flagged EU annex records in one pass.

INCI Checker

Compare entries

Compare METHYLCHLOROISOTHIAZOLINONE AND METHYLISOTHIAZOLINONE side by side with another annex record to review differences in restrictions, concentrations and annex placement.

Compare

Browse the annex

See all records in Annex V and compare regulatory conditions across substances in this annex.

Open Annex V