2-methyl-1,2-thiazol-3-one

C4H5NOS

CAS2682-20-4
GHS06 Gefahrensymbol: Giftig – Totenkopf mit Knochen
GHS05 Gefahrensymbol: Ätzend – Ätzwirkung
GHS09 Gefahrensymbol: Umweltgefährlich – Umwelt
Danger

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Identification

CAS Number
2682-20-4
EC Number
220-239-6
UN Number
2928
Index Number
613-326-00-9
PubChem CID
39800

Physical-chemical properties

Molecular Formula
C4H5NOS
Molar Mass
115.16 g/mol
IUPAC Name
2-methyl-1,2-thiazol-3-one

Chemical Identifiers

InChI
InChI=1S/C4H5NOS/c1-5-4(6)2-3-7-5/h2-3H,1H3
InChI Key
BEGLCMHJXHIJLR-UHFFFAOYSA-N

Overview

2-methyl-1,2-thiazol-3-one (CAS 2682-20-4) is a heterocyclic compound with potent antimicrobial properties and significant industrial applications as a biocide. This thiazolone derivative represents an important class of sulfur-nitrogen heterocycles widely utilized in industrial chemistry for its exceptional antimicrobial efficacy. With the molecular formula C4H5NOS and a molecular weight of 115.16 g/mol, this compound features a five-membered ring structure containing both sulfur and nitrogen atoms, which contributes to its biological activity and chemical reactivity. The methyl substitution at the nitrogen position enhances its stability and modulates its antimicrobial spectrum. The compound exhibits significant safety considerations, classified under multiple acute toxicity categories (Acute Tox. 2 and 3) and presenting severe skin corrosion (Skin Corr. 1B) and eye damage (Eye Dam. 1) hazards. It also demonstrates strong skin sensitization potential (Skin Sens. 1A) and aquatic toxicity, requiring careful handling protocols and appropriate personal protective equipment. The ADR classification 6.1 indicates its status as a toxic substance for transportation purposes. Primary industrial applications include water treatment systems, where it functions as an effective biocide for controlling microbial growth, and in metalworking fluids as a preservative agent. The compound is also employed in paint and coating formulations to prevent biodeterioration. Unlike simpler antimicrobial agents such as 2,2-dibromo-2-cyanoacetamide, this thiazolone offers enhanced stability and broader spectrum activity. OYSI provides 2-methyl-1,2-thiazol-3-one to European industrial customers with comprehensive technical support and regulatory documentation for safe handling and application.

Safety & Classification

Danger
Classification:

Acute Tox. 2; Acute Tox. 3; Acute Tox. 3; Skin Corr. 1B; Eye Dam. 1; Skin Sens. 1A; Aquatic Acute...

HHazard Statements (H-Statements)

Describe the nature and severity of the hazard

H330

Fatal if inhaled.

H311

Toxic in contact with skin.

H301

Toxic if swallowed.

H314

Causes severe skin burns and eye damage.

H318

Causes serious eye damage.

H317

May cause an allergic skin reaction.

H400

Very toxic to aquatic life.

H410

Very toxic to aquatic life with long lasting effects.

Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).

First Aid Measures

Inhalation

Fatal

Measures if vapours or dust are inhaled

First Aid Actions

  • +P304IF INHALED:
  • +P340Remove person to fresh air and keep comfortable for breathing.
  • +P311Call a POISON CENTER/doctor.

Related hazard statements:

Skin Contact

Toxic

Measures if substance contacts the skin

First Aid Actions

  • +P302IF ON SKIN:
  • +P352Wash with plenty of water.
  • +P361Take off immediately all contaminated clothing.
  • +P313Get medical advice/attention.

Related hazard statements:

Eye Contact

Harmful

Measures if substance gets into the eyes

First Aid Actions

  • +P305IF IN EYES:
  • +P351Rinse cautiously with water for several minutes.
  • +P338Remove contact lenses, if present and easy to do. Continue rinsing.
  • +P313Get medical advice/attention.

Related hazard statements:

Ingestion

Toxic

Measures if substance is accidentally swallowed

First Aid Actions

  • +P301IF SWALLOWED:
  • +P330Rinse mouth.
  • +P331Do NOT induce vomiting.
  • +P310Immediately call a POISON CENTER/doctor.

Related hazard statements:

General Measures

Emergency 112 | Poison Control: +49 30 19240 (DE), +33 1 45 42 59 59 (FR), +31 30 274 88 88 (NL)

First aid measures are based on CLP classification and associated P-statements. They do not replace the Safety Data Sheet (SDS). In case of emergency, always consult the full SDS and a physician.

Transport (ADR)

UN Number2928
ADR Class6.1
Packing GroupII
Tunnel CodeD/E
Proper Shipping Name2-Methyl-2H-isothiazol-3-on, fest
Marine PollutantNo

Frequently Asked Questions

What is 2-methyl-1,2-thiazol-3-one?

2-methyl-1,2-thiazol-3-one is a heterocyclic organic compound with the molecular formula C4H5NOS and CAS number 2682-20-4. This chemical features a five-membered ring containing sulfur and nitrogen atoms, with a molecular weight of 115.16 g/mol. It is classified as a highly hazardous substance with acute toxicity and corrosive properties, requiring careful handling in industrial applications.

What are the physicochemical properties of 2-methyl-1,2-thiazol-3-one?

2-methyl-1,2-thiazol-3-one is an organic compound with molecular formula C4H5NOS and molecular weight 115.16 g/mol. As a thiazolone derivative, it contains both sulfur and nitrogen heteroatoms in its ring structure. The compound exhibits significant hazardous properties including acute toxicity and corrosive characteristics, which influence its physical behavior and require special handling considerations during use and storage.

What is 2-methyl-1,2-thiazol-3-one used for?

2-methyl-1,2-thiazol-3-one serves as an important intermediate in organic synthesis and pharmaceutical manufacturing. This heterocyclic compound is typically used in the production of specialized chemicals, drug synthesis pathways, and research applications. Due to its reactive thiazole structure, it functions as a building block for more complex molecules in fine chemical production and pharmaceutical research, though its high toxicity limits its use to professional industrial settings.

How to handle 2-methyl-1,2-thiazol-3-one safely?

2-methyl-1,2-thiazol-3-one requires extreme caution during handling due to its Acute Tox. 2-3 and Skin Corr. 1B classifications. Essential personal protective equipment includes chemical-resistant gloves, safety goggles, and protective clothing to prevent skin and eye contact. Work in well-ventilated areas or under fume hoods, as the substance can cause skin sensitization. Avoid inhalation, ingestion, and direct contact, and ensure emergency shower and eyewash stations are readily accessible.

How to store 2-methyl-1,2-thiazol-3-one correctly?

2-methyl-1,2-thiazol-3-one must be stored in tightly sealed containers in a cool, dry, well-ventilated area away from heat sources and incompatible materials. Due to its corrosive and toxic nature, use chemical-resistant containers and maintain controlled access with proper labeling. Store away from oxidizing agents and basic materials, and ensure storage areas comply with local chemical safety regulations. Regular container inspection is essential to prevent leakage or contamination.

What to do in case of contact with 2-methyl-1,2-thiazol-3-one?

Immediate action is required upon contact with 2-methyl-1,2-thiazol-3-one due to its corrosive properties. For skin contact, immediately remove contaminated clothing and rinse affected area with plenty of water for at least 15 minutes. In case of eye contact, flush immediately with water for 15-20 minutes and remove contact lenses if present. If inhaled, move to fresh air immediately. Seek medical attention promptly for all exposure routes, especially given the substance's high acute toxicity classification.

How to dispose of 2-methyl-1,2-thiazol-3-one properly?

2-methyl-1,2-thiazol-3-one disposal must comply with local and European waste regulations due to its high toxicity and environmental hazard classification. The substance cannot be disposed of in regular waste streams and requires specialized hazardous waste treatment. Contact licensed hazardous waste disposal companies for proper collection and treatment. Ensure complete documentation of disposal processes and maintain records as required by REACH and local environmental regulations for toxic substances.

How to transport 2-methyl-1,2-thiazol-3-one?

2-methyl-1,2-thiazol-3-one is classified under ADR Class 6.1 (toxic substances), Packing Group II, indicating moderate to high transport risk. Transportation requires appropriate dangerous goods packaging, labeling with GHS06, GHS05, and GHS09 pictograms, and proper documentation. Only authorized carriers with dangerous goods certification can transport this substance. Ensure compliance with ADR regulations for toxic materials and use UN-approved packaging suitable for corrosive and toxic substances during shipment.

Is 2-methyl-1,2-thiazol-3-one subject to specific regulations?

2-methyl-1,2-thiazol-3-one is subject to comprehensive European chemical regulations under REACH and CLP due to its hazardous properties. While not currently listed as an SVHC (Substance of Very High Concern), it requires safety data sheets, hazard communication, and registration for commercial use. The substance falls under strict handling requirements due to its acute toxicity and corrosive nature, and users must comply with occupational exposure limits and environmental protection measures as mandated by EU legislation.

Where to buy 2-methyl-1,2-thiazol-3-one in Europe?

2-methyl-1,2-thiazol-3-one is available through OYSI, a specialized European distributor of technical chemicals and pharmaceutical intermediates. As a professional chemical supplier, OYSI provides this hazardous substance to qualified industrial customers with proper safety documentation and regulatory compliance. Due to the substance's high toxicity classification and regulatory requirements, purchases are restricted to professional users with appropriate handling capabilities and safety infrastructure for dangerous chemical substances.

Data Sources

Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.