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725765

Sigma-Aldrich

2-Methyl-4-isothiazolin-3-one

95%

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Synonym(s):
2-Methyl-3(2H)-isothiazolone
Empirical Formula (Hill Notation):
C4H5NOS
CAS Number:
2682-20-4
Molecular Weight:
115.15
Beilstein:
606203
EC Number:
220-239-6
MDL number:
MFCD01742315
PubChem Substance ID:
329764182
NACRES:
NA.21

Quality Level

100

Assay

≥94.0% (GC)
95%

form

lumps

impurities

≤5% water

SMILES string

CN1SC=CC1=O

InChI

1S/C4H5NOS/c1-5-4(6)2-3-7-5/h2-3H,1H3

InChI key

BEGLCMHJXHIJLR-UHFFFAOYSA-N

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This Item
7356995165713309
2-Methyl-4-isothiazolin-3-one 95%

Sigma-Aldrich

725765

2-Methyl-4-isothiazolin-3-one

2-Methyl-4-isothiazolin-3-one analytical standard

Supelco

73569

2-Methyl-4-isothiazolin-3-one

3-Methyl-2-ketopiperazine ≥97.0% (GC)

Sigma-Aldrich

95165

3-Methyl-2-ketopiperazine

Methyl 2-oxobutanoate 95%

Sigma-Aldrich

713309

Methyl 2-oxobutanoate

form

lumps

form

-

form

crystals

form

liquid

impurities

≤5% water

impurities

≤13.0% water (Karl Fischer)

impurities

-

impurities

≤1.0% water

Signal Word

Danger

Hazard Classifications

Acute Tox. 2 Inhalation - Acute Tox. 3 Dermal - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Skin Corr. 1B - Skin Sens. 1A

Supplementary Hazards

EUH071

Storage Class Code

6.1A - Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Christina L Burnett et al.
International journal of toxicology, 29(4 Suppl), 187S-213S (2010-07-22)
Methylisothiazolinone (MIT) is a heterocyclic organic compound used as a preservative in cosmetics and personal care products in concentrations up to 0.01%. MIT is a colorless, clear liquid with a mild odor that is completely soluble in water; mostly soluble
A Spawn et al.
Neuroscience, 205, 194-204 (2012-01-17)
Methylisothiazolinone (MIT) is a commonly used biocide known to be neurotoxic in vitro. Brief exposure of cortical neurons in culture to MIT results in increased neurodegeneration, whereas chronic exposure of developing neurons in culture to low concentrations of MIT has
Eleanor Higgins et al.
Dermatitis : contact, atopic, occupational, drug, 24(2), 73-76 (2013-03-12)
The isothiazolinones methylchloroisothiazolinone and methylisothiazolinone (MCI/MI) are the active ingredients in a frequently used preservative in cosmetic, household, and industrial products. This study reviewed our department's cases of allergic contact dermatitis caused by MCI/MI, outlining their clinical presentation and possible
Julien Mutschler et al.
Toxicology in vitro : an international journal published in association with BIBRA, 23(3), 439-446 (2009-05-16)
Assessment of skin sensitization hazard of chemicals currently depends on in vivo methods. Considering the forthcoming European Union ban on in vivo testing of cosmetic/toiletry ingredients, the search for alternative non-animal approaches is an urgent challenge for investigators today. For
Leena Ackermann et al.
Contact dermatitis, 64(1), 49-53 (2010-12-21)
Antimicrobials constitute the second most common cause of contact allergy to cosmetics. Methylisothiazolinone (MI), previously always used together with methylchloroisothiazolinone (MCI), has recently been approved in the EU for use on its own in cosmetics and also various industrial products.
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