2-Methyl-4-isothiazolin-3-one
CAS Number: 2682-20-4
Chemical Formula: C4H5NOS
Synonyms: 1-(4-CHLOROPHENYL)-3-(3,4-DICHLOROPHENYL)UREA, 2-METHYL-4-ISOTHIAZOLIN-3-ONE, 2-METHYL-4-ISOTHIAZOLINE-3-ONE
Appearance: Light Yellow Liquid
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Products Description
Methylisothiazolinone, commonly referred to as 2-methyl-4-isothiazolin-3-one, is a highly effective synthetic biocide and preservative belonging to the isothiazolinone family.It is widely applied to inhibit slime bacteria, fungi, and algae in pulp and paper production, cooling water systems, oilfield processes, industrial water systems, and air scrubbers. It also serves as a preservative in adhesives, coatings, fuels, metalworking fluids, resin emulsions, paints, and other industrial products. 
Chemical Properties
| Item | Value |
| Melting point | 254-256 °C(lit.) |
| Boiling point | bp0.03 93° |
| density | 1.25 (14% aq.) |
| vapor pressure | <0.1 mm Hg (25 °C) |
| storage temp. | 2-8°C |
| solubility | Chloroform, Ethyl Acetate |
| pka | -2.03±0.20(Predicted) |
| form | Solid |
| color | Yellow |
| Water Solubility | 489g/L at 20℃ |
| BRN | 606203 |
| Cosmetics Ingredients Functions | PRESERVATIVE |
| Cosmetic Ingredient Review (CIR) | 2-Methyl-4-isothiazolin-3-one (2682-20-4) |
| InChI | 1S/C4H5NOS/c1-5-4(6)2-3-7-5/h2-3H,1H3 |
| InChIKey | BEGLCMHJXHIJLR-UHFFFAOYSA-N |
| SMILES | CN1SC=CC1=O |
| LogP | -0.486 at 20℃ |
| CAS DataBase Reference | 2682-20-4(CAS DataBase Reference) |
| NIST Chemistry Reference | 3(2H)-isothiazolone, 2-methyl-(2682-20-4) |
| EPA Substance Registry System | 2-Methyl-3(2H)-isothiazolone (2682-20-4) |
Safety Information
| Item | Value |
| Hazard Codes | N,C,T |
| Risk Statements | 50/53-50-43-34-20/21/22-37-23-22 |
| Safety Statements | 60-61-36/37/39-26-24-45 |
| RIDADR | UN 3077 9/PG 3 |
| WGK Germany | 2 |
| RTECS | FE1250000 |
| TSCA | TSCA listed |
| HazardClass | 8 |
| PackingGroup | III |
| HS Code | 29349990 |
| Storage Class | 6.1A – Combustible acute toxic Cat. 1 and 2 very toxic hazardous materials |
| 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 |
| Hazardous Substances Data | 2682-20-4(Hazardous Substances Data) |
Product Application
2-Methyl-4-isothiazolin-3-one (methylisothiazolinone) is an isothiazolinone-based biocide and preservative used in personal care formulations. It is also used to control microbial growth in aqueous solutions.
Supply & Delivery
Fast delivery time
Inventory: 2-3 working days
New production: 7-10 working days
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