Tetrahydro-4H-pyran-4-one CAS 29943-42-8

1. Tetrahydro-4H-pyran-4-one is primarily used as a fundamental building block in organic synthesis and medicinal chemistry research for constructing complex molecules, including natural products and pharmaceuticals .
2. Tetrahydro-4H-pyran-4-one CAS 29943-42-8 serves as a versatile precursor for synthesizing tetrahydropyran (THP) derivatives, which are common structural motifs influencing the pharmacokinetic properties of drug candidates, such as metabolic stability and bioavailability .
3. Tetrahydro-4H-pyran-4-one is employed in the preparation of 4-methoxytetrahydropyran-4-yl protecting groups for alcohols, in nucleotide synthesis, and in Wittig reactions for the synthesis of penicillins and vitamin D3 analogs .
4. Researchers utilize Tetrahydro-4H-pyran-4-one CAS 29943-42-8 in one-pot, three-component reactions for synthesizing 2-amino-4H-pyrans and tetrahydro-4H-chromenes, as well as in enantioselective alpha-aminoxylation studies with nitrosobenzene and L-proline in ionic liquids .

1. Tetrahydro-4H-pyran-4-one must be stored in a tightly sealed container in a cool, dry, and well-ventilated environment, protected from light and heat, with recommended storage under inert gas at room temperature (in a cool, dark place below 15°C) .
2. Tetrahydro-4H-pyran-4-one CAS 29943-42-8 is a flammable liquid classified as GHS Category 3 (H226: Flammable liquid and vapour) with a flash point of 55°C (131°F), requiring storage away from heat, sparks, open flames, and incompatible materials such as strong oxidizing agents and strong bases .
3. Personnel must wear chemical-resistant nitrile rubber gloves (minimum 0.4 mm thickness), safety goggles with side-shields, face protection, and flame retardant antistatic protective clothing when handling this substance, as it causes skin and eye irritation (H315, H319) .
4. Avoid formation of dust and aerosols, ensure adequate ventilation in work areas (preferably a chemical fume hood), use explosion-proof electrical equipment and non-sparking tools, take measures against static discharge, and wash thoroughly after handling .

1. Isolate the spill area, ensure adequate ventilation, remove all sources of ignition, and wear full personal protective equipment including chemical-resistant gloves, safety goggles, and appropriate respiratory protection when tetrahydro-4H-pyran-4-one is released .
2. Contain and collect Tetrahydro-4H-pyran-4-one CAS 29943-42-8 using non-combustible absorbent materials such as sand, earth, diatomaceous earth, or vermiculite, using spark-proof and explosion-proof tools, and place into suitable closed containers for disposal .
3. Beware of vapors accumulating to form explosive concentrations in low areas, avoid creating vapors or mists during cleanup, decontaminate surfaces using appropriate methods, and prevent the product from entering drains or water courses .
4. Dispose of collected material according to local, state, and federal environmental regulations, preferably through licensed chemical destruction or controlled incineration, following precautionary statement P501 .

1. Tetrahydro-4H-pyran-4-one is a combustible liquid with NFPA fire rating of 2 (flash point 55°C, boiling point 166-167°C), requiring moderate heating before ignition, and may emit toxic fumes including carbon oxides under fire conditions .
2. Use Tetrahydro-4H-pyran-4-one CAS 29943-42-8 dry chemical powder, carbon dioxide, alcohol-resistant foam, or water spray to extinguish fires involving the product; do NOT use water jet as it may spread the fire .
3. Firefighters should wear self-contained breathing apparatus in pressure-demand, MSHA/NIOSH approved, and full protective gear when handling burning tetrahydro-4H-pyran-4-one due to hazardous decomposition gases generated by thermal decomposition .
4. During combustion, may emit irritant and toxic fumes; move containers from the fire area if safe to do so, cool exposed containers with water spray, contain fire runoff to prevent environmental contamination, and collect contaminated fire extinguishing water separately .