Methylisothiazolinone
Also known as: 2-Methyl-4-isothiazolin-3-one, 2-Methyl-3(2H)-isothiazolone, 2-Methylisothiazol-3(2H)-one, MIT, MI, N-Methylisothiazolone, Kathon CG, Skycide 100, MFCD00013254
Methylisothiazolinone (CAS 2682-20-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C4H5NOS and a molecular weight of 115.154 g/mol. Key properties include a melting point of 254-256 °C(lit.), a boiling point of 182.8±23.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 64.3±22.6 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H314 — Causes severe skin burns and eye damage and H317 — May cause an allergic skin reaction. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 2682-20-4
- Jingsj CID
- J-2771-7
- Molecular Formula
- C4H5NOS
- Molecular Weight
- 115.154 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 254-256 °C(lit.) |
|---|---|
| Boiling Point | 182.8±23.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 64.3±22.6 °C |
| Exact Mass | 115.009186 |
| PSA | 50.24000 |
| LogP | 0.05 |
| Vapor Pressure | 0.8±0.3 mmHg at 25°C |
| Refractive Index | 1.589 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H314 — Causes severe skin burns and eye damage
- H317 — May cause an allergic skin reaction
- H331 — Toxic if inhaled
- H335 — May cause respiratory irritation
- H400 — Very toxic to aquatic life
Activity & Biological Data
| Additional Information | [1]. Mari Paz Castanedo-Tardana, et al. Methylisothiazolinone. Dermatitis. Jan-Feb 2013;24(1):2-6. |
|---|
Customs & Trade Information
| HS Code | 2934999090 |
|---|---|
| Summary | 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of Methylisothiazolinone?
The CAS number of Methylisothiazolinone is 2682-20-4.
What are the molecular formula and molecular weight of Methylisothiazolinone?
Methylisothiazolinone has molecular formula C4H5NOS and molecular weight 115.154 g/mol.
Is Methylisothiazolinone hazardous?
Methylisothiazolinone has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H314 — Causes severe skin burns and eye damage; H317 — May cause an allergic skin reaction.
What are the upstream and downstream products of Methylisothiazolinone?
For Methylisothiazolinone, Upstream Products: N,N'-Dimethyl-3,3'-dithiodipropionamide, tert-Butyl peroxybenzoate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Methylisothiazolinone (CAS 2682-20-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-2771-7 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.