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CAS 26530-20-1 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

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InventoryRef 5762115/10/2010

OCTYLISOTHIAZOLINONE

2-Octyl-3(2H)-isothiazolinone

OCTYLISOTHIAZOLINONE is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 26530-20-1

CAS 26530-20-1PubChem CID 33528

2-n-Octyl-4-isothiazolin-3-one

2-octyl-3-isothiazolone is a clear dark amber liquid. Used as a fungicide. — CAMEO Chemicals

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

Molecular formula: C11H19NOS
Molecular weight: 213.34 g/mol
Exact mass: 213.11873540 Da
XLogP3: 3.5
Topological polar surface area: 45.6 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

Octhilinone2-Octyl-4-isothiazolin-3-onePancil2-Octyl-2H-isothiazol-3-one2-Octyl-3-isothiazolone2-Octyl-3(2H)-isothiazoloneSkane 8Micro-chek skane

16 more reported names

3(2H)-Isothiazolone, 2-octyl-Pancil-TKathon LMMicrobicide M-8Micro-chek 11Micro-chek 11DKathon SP 70Kathon LP preservativeKathon 4200RH 8934-Isothiazolin-3-one, 2-octyl-2-Octyl-3-isothiazolinone2-octyl-1,2-thiazol-3(2H)-one4LFS24GD0VRH-893EPA Pesticide Chemical Code 099901

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:81936
ChEMBL:CHEMBL1562104
EPA DTXSID:DTXSID1025805
PubMed:33806369
PubMed:30561685
PubMed:22056744
PubMed:21728892
PubMed:21329931
PubMed:21210827
PubMed:20960358
PubMed:20536482
PubMed:19928874
PubMed:19709196
PubMed:19486005
PubMed:18361111

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for OCTYLISOTHIAZOLINONE

INCI name

OCTYLISOTHIAZOLINONE

Description

2-Octyl-3(2H)-isothiazolinone

Record provenance

Inventory reference: 57621
Imported identity: OCTYLISOTHIAZOLINONE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for OCTYLISOTHIAZOLINONE

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Key data

CAS

26530-20-1

247-761-7

Restriction

—

Function

ANTIMICROBIAL: Preventing and/or slowing down microbial growth.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#17870 · OCTYLISOTHIAZOLINONE

Ingredients with overlapping formulation functions

NYMPHAEA TETRAGONA PHYTOPLACENTA EXTRACTANTIMICROBIAL, HAIR CONDITIONING, HUMECTANT, SKIN CONDITIONING

O-CRESOLANTIMICROBIAL, PERFUMING

O-CYMEN-5-OLANTIMICROBIAL, DEODORANT, PRESERVATIVE

OCTENIDINE HCLANTIMICROBIAL

OENANTHE JAVANICA EXTRACTANTIMICROBIAL

OENOTHERA LACINIATA LEAF/STEM EXTRACTANTIMICROBIAL, SKIN PROTECTING

OLEOCANTHALANTIMICROBIAL, ANTIOXIDANT, ORAL CARE, SKIN PROTECTING

OLIGOPEPTIDE-10ANTIMICROBIAL, DEODORANT, SKIN CONDITIONING

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How OCTYLISOTHIAZOLINONE appears in the CosIng inventory

The CosIng inventory lists OCTYLISOTHIAZOLINONE as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

OCTYLISOTHIAZOLINONE is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

OCTYLISOTHIAZOLINONE is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, OCTYLISOTHIAZOLINONE carries the following function designation(s):

ANTIMICROBIAL

CAS 26530-20-1 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Source note for OCTYLISOTHIAZOLINONE

This page reproduces the CosIng inventory entry for OCTYLISOTHIAZOLINONE from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research OCTYLISOTHIAZOLINONE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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