4-methylideneoxetan-2-one

4-methylideneoxetan-2-one is a four-membered cyclic organic compound with the molecular formula C4H4O2 and CAS number 674-82-8. This oxetanone derivative features a methylidene group attached to the oxetan-2-one ring structure. With a molecular weight of 84.07 g/mol, it belongs to the class of β-lactones, which are known for their high reactivity due to ring strain in the four-membered heterocycle.

4-methylideneoxetan-2-one is a highly reactive β-lactone with significant ring strain that makes it chemically unstable. As a small organic molecule with both carbonyl and alkene functionalities, it exhibits high reactivity toward nucleophiles. The compound's low molecular weight and polar nature suggest moderate volatility. Due to its reactive β-lactone structure, it is prone to hydrolysis and polymerization reactions under various conditions.

4-methylideneoxetan-2-one serves primarily as a reactive intermediate in organic synthesis and polymer chemistry. Its high reactivity makes it valuable for ring-opening polymerization reactions to produce biodegradable polyesters. The compound is also utilized in pharmaceutical research as a building block for drug synthesis, particularly for creating β-amino acid derivatives. Additionally, it finds applications in specialty chemical manufacturing where its unique reactivity profile is advantageous.

4-methylideneoxetan-2-one requires careful handling due to its flammable liquid classification (Flam. Liq. 3) and acute toxicity (Acute Tox. 4). Wear appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and lab coats. Work in well-ventilated areas or under fume hoods to avoid inhalation. Keep away from heat sources, sparks, and open flames. Use explosion-proof electrical equipment and ensure proper grounding to prevent static discharge.

4-methylideneoxetan-2-one should be stored in tightly sealed containers in a cool, dry, well-ventilated area away from heat sources and incompatible materials. Due to its flammable nature, store in fireproof cabinets designed for flammable liquids. Keep containers away from oxidizing agents and strong bases that could trigger unwanted reactions. Maintain storage temperatures below recommended limits and regularly inspect containers for signs of degradation or leakage.

Immediate action is required upon contact with 4-methylideneoxetan-2-one due to its acute toxicity classification. For skin contact, immediately remove contaminated clothing and wash affected area thoroughly with soap and water for at least 15 minutes. In case of eye contact, flush with clean water for 15 minutes while holding eyelids open. If inhaled, move to fresh air immediately. For ingestion, do not induce vomiting and seek immediate medical attention in all cases.

4-methylideneoxetan-2-one must be disposed of as hazardous chemical waste according to local and national regulations. Contact licensed waste disposal companies specialized in handling toxic and flammable chemicals. Do not pour down drains or dispose of in regular waste streams. Small quantities may be neutralized through controlled hydrolysis under professional supervision, but this should only be performed by trained personnel with appropriate safety measures and environmental permits.

4-methylideneoxetan-2-one is classified as ADR Class 6.1 (toxic substances) Packing Group I, indicating high danger level during transport. Use UN-approved packaging designed for Packing Group I toxic liquids. Vehicles must carry appropriate hazard placards and emergency response information. Drivers require ADR certification for transporting dangerous goods. Ensure proper documentation including transport documents and emergency response procedures. Avoid transport during extreme weather conditions and follow specific routing requirements for toxic materials.

4-methylideneoxetan-2-one is subject to various chemical regulations including REACH registration requirements in Europe for commercial use. The compound falls under CLP regulation for hazard classification and labeling, requiring GHS02 and GHS07 pictograms with 'Warning' signal word. It is not currently listed as a Substance of Very High Concern (SVHC). Users must comply with occupational safety regulations and may need specific permits for handling, storage, and disposal depending on quantities and local legislation.

4-methylideneoxetan-2-one is available through OYSI, a specialized European distributor of technical chemicals serving industrial and research customers across Europe. As a professional chemical supplier, OYSI ensures proper handling, packaging, and documentation compliance with European regulations including REACH and ADR transport requirements. Contact OYSI directly for availability, specifications, and regulatory documentation. Other specialized fine chemical suppliers may also offer this compound for research and industrial applications.