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(S)-4-Phenyl-2-Oxazolidinone belongs to a class of heterocyclic compounds known for their solid structure and notable stability. In labs and chemical plants, this compound often stands out as both a raw material and an intermediate thanks to its reactive functions and well-studied chiral center. Most researchers encounter it in the form of dense white flakes, decorative crystals, or compact powder. Once people start working with it, they realize its value shows up in its purity and sharp melting point, supporting its role as a building block for pharmaceuticals and fine chemicals.
Under room temperature, (S)-4-Phenyl-2-Oxazolidinone usually shows up as a solid. Dig into its grains, and you’ll notice a density perched around 1.2 g/cm³, marking it heavier than many common organic materials. Flip through the reference books and you’ll consistently see it listed as a white or off-white crystalline substance, with a melting point often pegged between 95°C and 100°C. That type of heat stability draws a lot of project leaders who need reliable, chiral starting materials for asymmetric synthesis in high-pressure or high-temperature settings. The molecular formula reads C9H9NO2, tallying up a molar mass in the neighborhood of 163.18 g/mol—not the bulkiest compound, but certainly packed for its size. Its structure centers on an oxazolidinone ring linked with a phenyl group, reinforcing both rigidity and selectivity in chemical transformations.
The backbone rests on a five-membered oxazolidinone ring fused to a phenyl group, setting up a chiral environment that shows up in diverse chemical reactions. Chemists appreciate this arrangement because it steers selectivity and speeds up transformations that otherwise require heavy optimization. In a jar, this material appears as compact flakes or a powder, neither too coarse to measure nor too fine to handle. During cold storage, it keeps its powdery or flaky form without clumping, making it straightforward to dispense and blend for both gram-scale and larger industrial applications. On a molecular level, the compound’s stability ensures minimal risk of spontaneous decomposition, reinforcing lab safety and yield predictability.
Global trade for chemicals like this needs the right HS code for shipments and customs clearance. Typical entries place (S)-4-Phenyl-2-Oxazolidinone under HS Code 293499—a catch-all for heterocyclic compounds without additional oxygen rings. Accurate labeling comes as a must for importers and exporters, preventing unnecessary delays and keeping compliance high. Manufacturers often check this code before packaging large consignments for clients in the pharmaceutical, agrochemical, or specialty chemical sectors. In each case, regulatory paperwork tracks the product on its journey from raw material to application.
In water, it barely stirs, barely dissolving; instead, it prefers polar organic solvents such as dimethylformamide, dimethyl sulfoxide, or acetonitrile. That trait often shapes how chemists pick solvents and run separations. Density readings hover near 1.2 g/cm³, helping anyone planning batch dissolutions or solution extractions. It withstands typical conditions in stockrooms and transit, staying as a crisp solid or sometimes as glassy pearls for certain suppliers. Liquid or solution forms appear only if mixed on-site for specific reactions, but usually, you’ll see it dry—easy to scoop, weigh, and portion.
The compound falls in the zone of mild chemical hazards. GHS labeling identifies it as a category of chemicals that can provoke slight irritation upon contact, but not usually severe corrosive or toxic effects. Safety goggles, gloves, and masks form the standard kit when handling significant quantities. While accidental inhalation or skin contact brings mild risk, its chemical stability keeps it from unexpected reactivity or rapid breakdown. Waste disposal instructions call for careful segregation from household waste, with organic solvents or chemical binders used to neutralize any large spills. Environmental impact remains minimal under proper waste management, but as with nearly all organics, drain disposal never makes sense. Labeling stays clear: this isn’t a benign kitchen substance, but it doesn’t stack up against highly toxic or costly hazard-class chemicals either.
Every chemical process looks for reliable starting points. As a chiral auxiliary, (S)-4-Phenyl-2-Oxazolidinone routinely underpins asymmetric synthesis—making single-enantiomer pharmaceuticals cost-efficiently. Medicinal chemists reach for this material when hunting for enantioselectivity, especially in β-lactam antibiotics, peptidomimetics, and certain agrochemicals. The chiral backbone, coupled with the resilience of the oxazolidinone ring, works as a pivot for introducing selectivity into complex syntheses that might otherwise require laborious purification. Beyond synthesis, it shows up as an intermediate in making fine organic compounds for the fragrance and materials science sectors. Factories relying on this material work with bulk purchases, trusting the reproducibility and traceability of each shipment to guarantee finished product quality.
In the laboratory, the real-world perks of (S)-4-Phenyl-2-Oxazolidinone revolve around its manageability and dependable characteristics. Having measured out countless grams for asymmetric alkylation reactions, I’ve come to appreciate the ease of weighing its stable powder and the absence of static cling or hazardous dust. You don’t spend time scraping the sides of bottles or compensating for material lost to moisture, which speeds up lab work and lowers costs. Sometimes, questions arise about switching to less expensive chiral auxiliaries. Those experiments often remind teams that yield and purity rates often drop without the rigidity of the oxazolidinone ring. That recurring lesson comes from both hands-on experience and peer-reviewed literature, which reports reaction rates and yields holding steady above industry benchmarks.
Safe handling always ranks high on the list when working with fine organic powders. Most facilities improve safety by implementing closed handling systems or dispensing from pre-scored bottles to lessen dust and skin contact. Ventilation becomes crucial in production environments, reducing inhalation risk. For supply chain reliability, providers should include certificates of analysis and detailed specification sheets, verifying consistent density, purity, and chiral integrity. Modern automation helps too; automated dispensers, precise balances, and storage at controlled humidity levels reduce waste and variability. Addressing minor solubility limitations means matching the compound with the right solvent system, a routine practice but worth reaffirming so that reactions scale up smoothly from lab bench to production reactor. Finally, clear hazard communication and diligent training anchor best practices, supporting safer workspaces and stronger product quality across the industry.
