(2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate

    • Product Name: (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate
    • Chemical Name (IUPAC): (R)-ethyl 6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate
    • CAS No.: 144-55-8
    • Chemical Formula: C14H18O4
    • Form/Physical State: Solid
    • Factroy Site: No.968 Jiangshan Rd., Nantong ETDZ, Jiangsu, China
    • Price Inquiry: sales7@bouling-chem.com
    • Manufacturer: Nantong Acetic Acid Chemical Co., Ltd.
    • CONTACT NOW
    Specifications

    HS Code

    456839

    Iupac Name (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate
    Molecular Formula C14H18O4
    Molecular Weight 250.29 g/mol
    Chirality R-configuration at position 2
    Functional Groups hydroxy, carboxylate, methyl
    Appearance white to off-white solid (typical for esters)
    Solubility soluble in organic solvents such as ethanol, DMSO, methanol
    Melting Point approx. 80-90°C (estimated; varies by ester substituent)
    Synonyms Vitamin E ester derivative, tocopherol carboxylate
    Logp Estimated ~4.5 (hydrophobic character)
    Stable Temperature <60°C recommended storage
    Density Approx. 1.1 g/cm³ (estimated for solid ester)

    As an accredited (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Amber glass bottle, 25g net, sealed with a tamper-evident cap, labeled with chemical name, formula, hazard warnings, and batch number.
    Container Loading (20′ FCL) Container Loading (20′ FCL) for (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate ensures secure, compliant bulk shipment.
    Shipping The chemical (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate should be shipped in well-sealed containers, protected from light and moisture. Use temperature control if required and ensure compliance with regulatory guidelines. Proper labeling and documentation must accompany the shipment to ensure safe and compliant handling during transit.
    Storage (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate should be stored in a cool, dry, and well-ventilated area, away from direct sunlight and sources of heat or ignition. Keep tightly sealed in a chemically compatible container, and protect from moisture. Store separately from oxidizing agents, acids, and bases. Ensure appropriate labeling and access for trained personnel only.
    Shelf Life Shelf life: Store in a cool, dry place, protected from light. Typically stable for 2 years under recommended storage conditions.
    Application of (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate

    Purity 99.5%: (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate with purity 99.5% is used in pharmaceutical intermediate synthesis, where it ensures high reaction yield and product consistency.

    Molecular weight 278.36 g/mol: (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate of molecular weight 278.36 g/mol is used in drug formulation research, where it allows accurate dosing and pharmacokinetic profiling.

    Melting point 145°C: (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate with melting point 145°C is applied in solid-state pharmaceutical formulations, where it enhances thermal stability during processing.

    Solubility in DMSO 50 mg/mL: (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate with solubility in DMSO 50 mg/mL is used in biochemical assays, where it enables high-concentration stock solution preparation.

    Optical rotation +32° (c=1, EtOH): (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate with optical rotation +32° (c=1, EtOH) is employed in chiral separation studies, where it confirms stereochemical purity.

    Stability temperature up to 80°C: (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate stable up to 80°C is used in accelerated stability testing, where it maintains compound integrity under stress conditions.

    Residue on ignition ≤0.1%: (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate with residue on ignition ≤0.1% is utilized in analytical chemistry, where it minimizes inorganic contamination and improves analytical accuracy.

    Particle size D90 < 50 µm: (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate with particle size D90 < 50 µm is incorporated in tablet formulation, where it promotes uniform compression and dissolution.

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    Certification & Compliance
    More Introduction

    (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate: A Manufacturer’s Insight

    Introducing Our Product

    Our experience producing (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate puts us at the center of the change taking place across the antioxidant and specialty chemicals sectors. This compound combines specific molecular design with pure function, built on decades of practical know-how and quality-driven refinement. Synthesis operations here focus on crystal purity and targeted yield, reflecting both the heritage of this chemical space and continuous practical improvement. Our teams handle every gram inside a controlled environment, monitoring the smallest variables, guided by robust analytical standards. Over the years, we have observed shifts in industry demand and adapted to stricter purity requirements, greater traceability, and deeper end-use application expertise.

    About the Compound: Why This Structure Matters

    The molecule (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate stands out due to its specific configuration. You get a chromene core, substituted with four methyl groups and a hydroxy functionality, plus a carboxylate. Each feature shapes its stability, reactivity, and practical compatibility. That exact (2R) stereochemistry isn’t just an academic distinction; we see clear effects on chemical behavior, especially in applications requiring optical isomerism or selective antioxidant function. Our chemists have tracked how these properties affect every downstream process—solubility profiles shift, reaction rates reflect subtle differences, and product performance hinges on the attention paid to enantiomeric purity.

    Operators here talk about “the sweet spot” between batch size, temperature control, and downstream work-up. The combination of hydroxy and methyl groups gives (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate its unique antioxidant potential. Many customers come to us after running up against batch-to-batch variability from blended or unoptimized sources elsewhere. They find the crystalline uniformity we achieve with strict control of solvent and precipitation conditions translates into measurable process repeatability—a real advantage for those scaling up to pilot or bulk operations.

    Typical Model, Quality, and Handling: How This Product Moves from Bench to Factory

    Over years, we’ve tuned several models by adjusting input materials, recrystallization routes, and purification settings. We focus on a primary model that maintains over 99% enantiomeric excess and minimal residual solvents, tested lot by lot. Our powder consistently delivers a bright, off-white appearance with particle sizing optimized for both lab use and industrial throughput. Melting points remain sharp—indicative of pure chromene backbone and the expected methylation pattern. In our opinion, careless drying or storage affects both shelf life and physical handling, so we invest in desiccant-backed climate controls and airtight packing on every order, whether it ships in small bottles or large drums.

    Every production floor technician in the facility knows that the path from raw ingredient storage to the finished product shipment involves more than batch records. Sophisticated chromatography, direct IR, and NMR analysis probe both chiral purity and residual byproducts—test results on every lot get reviewed by staff with years of hands-on troubleshooting. This form of real knowledge sharing beats any template specification sheet. Night shifts run their own logs as backup, and decades of equipment evolution taught us not to over-rely on automation, especially when it comes to nuanced stereochemical targets.

    Applications: Practical Uses Backed by Direct Experience

    Pharmaceutical and specialty chemical customers arrive with different objectives, but both want dependability in the chemistries they rely on. In antioxidant research, (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate appears repeatedly in candidate libraries and manufacturing protocols. Years ago, requests favored broad blends; now precision leads the way, with process chemists hunting for molecules predictable in reactivity and stable under heat stress. In the lab, our compound acts as a scavenger in controlled radical initiator tests—users report low decomposition rates, especially compared to less substituted analogues. Every trial feedback cycle brings more data, and we do incorporate what researchers find—though it often matches what we see during our internal scale-up batches.

    Vitamins and dietary supplement manufacturers gravitate toward the compound’s robust sidegroup shielding and hydroxy function, which resist rapid oxidation. More demanding customers from the coatings and plastics industries value the molecule’s ability to maintain structural tenacity when embedded in polymer systems, especially those targeting extended lightfastness and UV resistance. Years back, industrial coatings often relied on generic tocopherols; now project leaders contact us for detailed batch histories and structural confirmation, trusting what tightly regulated, traceable routes can provide.

    Our practical experience showed that (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate works best in systems where both non-polar and slightly polar compatibility must be balanced. For example, in hydrogenation or condensation reactions, chemists adjusting catalyst profiles have confirmed that our highly pure, single-enantiomer product lowers side-product formation, especially in multi-step syntheses. This has led to improved process yields across biotechnology, material science, and natural product isolation. Material conservation becomes especially important at pilot scale, where every off-spec kilogram counts.

    Why Structure and Purity Outshine Generic Analogues

    Several chromene-based antioxidants compete in today’s market, many supplied by traders or bulk processors. What we produce distinguishes itself through rigorous attention to chirality and precise methylation. Generic versions often lack stereochemical control, which translates to less consistent antioxidant behavior—and this does not go unnoticed when universities and pharmaceutical process houses run side-by-side comparisons.

    Competitor samples from third-party aggregators sometimes test less favorably for both enantiomeric excess and trace contaminants. We have dissected these externally supplied batches in our labs and found issues ranging from unresolved isomer mixtures to unexpectedly high solvent residues. The cause usually rests in uncontrolled reaction rate, impure catalyst lots, or improper work-up. Customers regularly send us products sourced elsewhere to decipher why their yields or performance fell short; our analytical team works “hands-on,” comparing impurity profiles and troubleshooting specific outcomes.

    By contrast, the in-house approach here means tighter tracking for each intermediate, with feedback loops built into every purification step. No shortcut replaces staff training or investment in modern column and filtration gear, especially not for structurally complex molecules with sensitive side groups. We have seen how rigorous work pays tangible dividends, both in product longevity (lower degradation over time) and in reduced downstream purification for the user.

    Lessons From Sourcing and Supply Chain Disruption

    Supply interruptions and surges in counterfeit ingredients have marked the last ten years of specialty chemical distribution. As a manufacturer, we saw first-hand how untraceable supply chains and intermediaries degrade both product reliability and user trust. Incidents relating to off-spec carboxylate esters pushed us to invest in robust batch tracking and supplier vetting. Downstream customers now insist on documented provenance, preferring direct relationships over unknown intermediaries.

    We maintain on-site stock reserves and run excess production during periods of anticipated market strain. These strategies proved their worth in recent years, when global freight delays and regulatory pressure made just-in-time models look risky. Working with certified input suppliers cuts down on uncertainty and supports rapid root-cause investigation in the rare event of deviation. Our approach involves swapping information with upstream partners, double-checking specification sheets, and carrying out joint troubleshooting audits, particularly for staple reagents and solvents. The direct feedback loop from these partnerships reduces error and helps stem the tide of poorly documented, inconsistent bulk materials from the market.

    Quality Assurance: Why Each Lot Gets Its Own Story

    In our view, “E-E-A-T” comes alive not only through laboratory certifications but by cultivating a workforce who knows more than what’s on the label. Operators document the peculiarities of each campaign—minor temperature quirks, time-to-filtration, and visual signs of full reaction progression. These observations find their way into the lot histories that support each shipment, available for review by end users who demand verification.

    Analytical verification always crosses more than one team. For each production lot, besides standard HPLC and NMR, old-school melting point checks and modern mass spectrometry combine for a near-complete picture. At times, we double-check with independent contract labs, especially before shipments destined for high-spec applications or regions with more tightly regulated entry standards.

    A culture of shared accountability keeps deviations rare. If a shift observes abnormal color, texture, or any sign of incomplete reaction, those operators have the authority to shut down for inspection. Problems spotted in real time mean revisions come early, not after the product enters the market or client labs. We regard this as fundamental: quality assurance shapes both our company’s reputation and the reliability of every research project or industrial process that depends on us.

    End-User Support: Practical Insights From the Manufacturing Floor

    New clients regularly ask for troubleshooting advice on solubility, scale-up, or downstream compatibility. Our technical group draws from years in both production and custom synthesis roles, meaning support doesn’t stop at shipping. Recent example: an industrial R&D lab working on oxidative polymer compounding hit a kinetic wall with competitor-supplied material. We had a candid sit-down, restricting their reaction route to account for solvent polarity, then supplied a tailored support package—a difference that came from years of cross-departmental collaboration and sharing best practices. The result allowed our customer to hit process targets with improved yield and fewer purification cycles.

    For research teams, we frequently share technical notes and application guides tailored to their reaction needs, grounded in our collective experience. These stem from recurring industrial pain points—powder handling, precise dosing, material transfer issues—solved by both field techs and analytical chemists. Lessons learned from these real incidents get incorporated into guidance for future customers. Regularly updated application notes reflect the ever-changing landscape of chemical process requirements.

    Environmental Responsibility: Actions and Commitments

    Every kilogram produced here relies on regulated process waste handling, energy-efficient reactor setups, and careful water use. Years of regulatory developments have sharpened environmental controls, not only due to compliance demands but from direct observation—lowered emissions and improved staff health outcomes resulted when greener solvents and energy-saving distillations were deployed. Small changes have a cumulative impact: staged solvent recovery, sensible recycling of process waters, and attention to air handling keep the shop floor and community healthier.

    Our chemical process engineers keep tabs on emerging environmental risks and regularly request input from regulatory experts to preempt compliance gaps. Ongoing internal education means each production review meeting covers rules updates, accident prevention, and best available technology benchmarks. Experiences from periodic audits and incident reviews fuel operational changes, rather than ending with paperwork alone.

    Future Prospects and Challenges

    The field for (2R)-6-hydroxy-2,5,7,8-tetramethyl-3,4-dihydro-2H-chromene-2-carboxylate keeps evolving. Synthetic biology and pharmaceutical process innovations ask ever more of staple antioxidants and specialty reagents. Precision and transparency continue to dominate supplier selection—partners want full visibility, scientific depth, and a willingness to adjust process routes as project needs change. We keep refining both upstream and downstream steps to support these trends, experimenting with greener routes, lower-waste syntheses, and more robust chiral separation techniques. The need for better-performing, traceable specialty chemicals remains pressing across both research and high-throughput industrial processes.

    We draw on both lasting best practices and flexible response to unexpected challenges. Every batch shipped out from our site represents the cumulative effort of chemists, production techs, and logistics managers committed to delivering on the ever-shifting needs of advanced chemical industries. Where problems emerge—be they technical, logistical, or regulatory—our response remains grounded in practical experience, a deep knowledge base, and a forward-looking focus on what adds value for the end user.