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 organic compound with potent antimicrobial properties and significant safety hazards. This thiazolone derivative represents an important class of sulfur-nitrogen containing heterocycles widely utilized in industrial applications requiring effective preservation and antimicrobial action. 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 distinctive chemical reactivity and biological activity. The compound presents significant safety considerations, classified under multiple acute toxicity categories (Acute Tox. 2 and 3) and exhibiting severe skin corrosive properties (Skin Corr. 1B). It causes serious eye damage (Eye Dam. 1) and acts as a strong skin sensitizer (Skin Sens. 1A), requiring careful handling with appropriate personal protective equipment. The presence of GHS06, GHS05, and GHS09 pictograms indicates its toxic, corrosive, and environmentally hazardous nature. Transportation falls under ADR Class 6.1, reflecting its toxic properties. Industrial applications of 2-methyl-1,2-thiazol-3-one primarily center on its antimicrobial efficacy in preservation systems, particularly in metalworking fluids and water treatment applications. The compound also finds use in specialized chemical synthesis processes where its unique heterocyclic structure provides valuable reactivity patterns. Unlike structurally different antimicrobials such as 2,2-dibromo-2-cyanoacetamide, this thiazolone offers distinct advantages in specific pH ranges and compatibility profiles. OYSI provides 2-methyl-1,2-thiazol-3-one to qualified industrial customers with comprehensive technical documentation and safety data sheets to ensure proper 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 thiazole derivative has a molecular weight of 115.16 g/mol and contains sulfur and nitrogen atoms within its five-membered ring structure. It is classified as a highly hazardous substance with multiple toxicity concerns, requiring careful handling and storage protocols in industrial applications.

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

2-methyl-1,2-thiazol-3-one is a small organic molecule with a molecular weight of 115.16 g/mol and the formula C4H5NOS. As a thiazole derivative, it typically appears as a crystalline solid at room temperature. The compound contains both sulfur and nitrogen heteroatoms in its ring structure, which influences its chemical reactivity and solubility characteristics. Specific physical properties such as melting point and solubility data would require laboratory analysis.

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

2-methyl-1,2-thiazol-3-one serves as an important intermediate in pharmaceutical and chemical synthesis applications. This thiazole derivative is commonly used in the production of active pharmaceutical ingredients and as a building block for more complex organic molecules. Its unique heterocyclic structure makes it valuable for developing antimicrobial agents and other bioactive compounds in the pharmaceutical industry, though specific applications depend on regulatory approvals and safety assessments.

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

2-methyl-1,2-thiazol-3-one requires extensive safety precautions due to its Acute Tox. 2-3, Skin Corr. 1B, and Skin Sens. 1A classifications. Essential PPE includes chemical-resistant gloves, safety goggles, and protective clothing. Work must be conducted in well-ventilated areas or under fume hoods to prevent inhalation exposure. Avoid direct skin and eye contact, as the substance can cause severe burns and sensitization. Emergency eyewash stations and safety showers should be 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 properties, storage areas should be equipped with appropriate containment systems and restricted access. The storage location must comply with local regulations for hazardous chemicals and be clearly labeled with appropriate GHS pictograms (GHS06, GHS05, GHS09) and hazard warnings.

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

2-methyl-1,2-thiazol-3-one contact requires immediate emergency response due to its corrosive and toxic nature. For skin contact, immediately remove contaminated clothing and rinse affected area with copious amounts of water for at least 15 minutes. In case of eye contact, flush immediately with water for 15-20 minutes while holding eyelids open. If inhaled, move to fresh air immediately. Seek immediate medical attention for all exposure routes due to the substance's high 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 national hazardous waste regulations due to its toxic and environmentally hazardous properties. The substance cannot be disposed of in regular waste streams and requires specialized hazardous waste treatment facilities. Collection, transport, and disposal must be handled by licensed waste management companies. All containers should be properly labeled and documented according to waste tracking requirements to ensure environmental protection.

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 toxicity requiring strict transport protocols. Packaging must meet UN specification requirements for toxic substances, with appropriate labeling including hazard diamonds and proper shipping names. Transport vehicles must carry appropriate emergency equipment and documentation. Only trained personnel should handle transportation, and emergency response information must accompany shipments throughout the transport chain.

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

2-methyl-1,2-thiazol-3-one is subject to comprehensive chemical regulations including REACH registration requirements in Europe and CLP classification obligations. While not currently listed as an SVHC substance, its multiple hazard classifications (Acute Tox. 2-3, Skin Corr. 1B, Eye Dam. 1, Skin Sens. 1A, Aquatic hazards) trigger strict handling, labeling, and reporting requirements. Users must maintain safety data sheets, implement risk management measures, and ensure compliance with occupational exposure limits and environmental protection standards.

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 an established chemical supplier, OYSI ensures proper handling, documentation, and regulatory compliance for this hazardous substance. Professional buyers requiring this thiazole derivative for legitimate industrial or research applications can contact OYSI for availability, specifications, and safety documentation. All purchases require appropriate licenses and safety protocols due to the substance's hazardous classification.

Data Sources

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