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Methylisothiazolinone (MIT or MI)

Hazardous Classification (according to GHS)

HAZARDOUS

CAS Number

2682-20-4

Signal Word

DANGER

Hazard Pictograms

GHS05 - Corrosion - Corrosive chemicals, may cause severe skin and eye damage and may be corrosive to metals. — GHS05 – Corrosion – Corrosive chemicals, may cause severe skin and eye damage and may be corrosive to metals.

GHS06 - Skull and crossbones - Fatal or toxic if swallowed, inhaled or in contact with skin. — GHS06 – Skull and crossbones – Fatal or toxic if swallowed, inhaled or in contact with skin.

GHS07 - Exclamation mark - Low level toxicity. This includes respiratory, skin, and eye irritation, skin sensitisers and chemicals harmful if swallowed, inhaled or in contact with skin. — GHS07 – Exclamation mark – Low level toxicity. This includes respiratory, skin, and eye irritation, skin sensitisers and chemicals harmful if swallowed, inhaled or in contact with skin.

GHS09 - Environment - Hazardous to aquatic life and the environment. — GHS09 – Environment – Hazardous to aquatic life and the environment.

Hazard Statements & Categories

H301 Toxic if swallowed (Class: Acute Toxicity – Oral, Category 3)
H311 Toxic in contact with skin (Class: Acute Toxicity – Dermal, Category 3)
H314 Causes severe skin burns and eye damage (Class: Corrosion/irritation – Skin, Category 1B)
H317 May cause an allergic skin reaction (Class: Sensitization – Skin, Category 1)
H330 Fatal if inhaled (Class: Acute Toxicity – Inhalation, Category 2)
H410 Very toxic to aquatic life with long lasting effects (Class: Aquatic – Chronic, Category 1)

Poisons Schedule (Australia)

Schedule 6

Dangerous Goods for Transport (according to ADG)

Classed as Dangerous Goods for Transport

Proper Shipping Name: TOXIC SOLID,CORROSIVE,ORGANIC,N. O. S
Class: 6.1
UN Number: 2928

Other names

2-METHYL- 3(2H)-ISOTHIAZOLONE
2-METHYL-2H-ISOTHIAZOL-3-ONE
2-METHYL-3(2H)-ISOTHIAZOLONE
2-METHYL-4-ISOTHIAZOLIN-3-ONE
3(2H)-ISOTHIAZOLONE, 2-METHYL-
3(2H)ISOTHIAZOLONE, 2METHYL
METHYLCHLOROISOTHIAZOLINONE225METHYLISOTHIAZOLINONE SOLUTION

What It Does

Preservative

Notes

Not entered

Information Sources

https://chemicalsafety.com/
https://redox.com/
https://en.wikipedia.org/wiki/Methylisothiazolinone
https://www.ewg.org/skindeep/ingredients/703935-METHYLISOTHIAZOLINONE/

Last Updated

October 13, 2025

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