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L-(-)-Dibenzoyltartaric Acid Anhydrate didn’t just pop up from nowhere; its story winds back to the late nineteenth century, and it’s tied closely to breakthroughs in stereochemistry. For decades, scientists turned to tartaric acid derivatives to solve tricky questions about molecular handedness. The benzoyl analog followed, and chemists like Louis Pasteur—who puzzled over tartaric acid crystals—paved the way for these developments. The necessity for optical resolution of racemic mixtures brought L-(-)-Dibenzoyltartaric Acid into regular laboratory use, especially as chiral resolving agents became more than just curiosities and started to define standards in purity, especially for pharmaceuticals. Over time, its application base broadened as research plugged away, mining every nuance out of this molecule’s stereoselective abilities.
This compound shows up as a white to off-white crystalline solid, and it’s not shy about showing its optical activity—a key trait for chiral chemistry. Known to have a melting point around 147-150°C, it dissolves decently in alcohols and a few polar solvents. Its chemical backbone consists of a tartaric acid core with both carboxyl groups esterified by benzoyl units. The “anhydrate” version tells a story of no water stuck to its crystal lattice, which sometimes helps in storage and certain reactions. Chiral purity matters because even a slight deviation causes headaches during resolutions; not all batches on the market meet the 99%+ enantiomeric excess needed for high-stakes work. For most labs, quality control samples get run by HPLC with chiral columns, and certificates of analysis don’t hide minor impurities or moisture content that might change the outcome of serious experiments.
Manufacturers put a lot of care into specifying purity grades, moisture content, and enantiomeric excess on batches of L-(-)-Dibenzoyltartaric Acid Anhydrate. High-purity forms geared for pharmaceutical work appear with tight specs, typically with total impurity thresholds below 0.5%. Labels state CAS number, systematic (IUPAC) name, optical rotation (usually [α]D around -136° to -142°, c = 1, MeOH), and storage conditions. Suppliers aiming for pharmaceutical and food use pack this information in easy-to-read technical sheets, not only for regulatory reasons but also to help scientists make fast purchase decisions.
Preparation usually starts from natural L-tartaric acid. Chemists benzoylate it with benzoyl chloride in basic solution, often using pyridine or sodium hydroxide to mop up the extra HCl, and then drive off water under vacuum to grab the anhydrous form. Some routes call for stepwise synthesis, purifying dibenzoyl intermediates, then crystallizing the final product from alcohol or ether. These methods don’t just focus on yield but also on reducing racemization and side reactions. Facility labs need good ventilation since benzoyl chloride stings the nose, and safe handling of minor byproducts matters to prevent skin and respiratory irritation.
L-(-)-Dibenzoyltartaric Acid Anhydrate’s real claim to fame is as a chiral resolving agent. Chemists turn to it when they need to split off enantiomers from racemic bases—alkaloids, amines, and some metal complexes. It reacts in solution, forming diastereomeric salts that have different solubility from each other. After crystallizing out the desired product, chemists sometimes recover the acid to use again. Its ability to shift reaction balance makes it a regular feature in asymmetric synthesis projects. Given its benzoyl groups, it’s stable in most organic reactions, yet still open for controlled hydrolysis when a lab tech needs to free up the tartaric acid skeleton for more modifications.
In catalogs and research papers, this compound comes up with a crowd of names: L-Dibenzoyltartaric acid, L(-)-DBTA, (2R,3R)-2,3-bis(benzoyloxy)butanedioic acid, and so on. Each name has its fans, partly depending on industry tradition or region. CAS number 2743-38-6 remains the gold standard for lookup. Patents, technical bulletins, and regulatory filings stick to systematic names to dodge confusion, but many bench chemists just call it “dibenzoyltartaric acid” in shorthand. Anyone ordering or specifying it in a supply chain or research setting checks the full name, optical activity, and form—hydrate or anhydrate—to match what their task needs.
In workspaces where L-(-)-Dibenzoyltartaric Acid Anhydrate sees regular use, safety routines keep things running without trouble. Users wear gloves, splash goggles, and lab coats since any chemical with reactive acid and ester groups can bite with enough exposure. Material Safety Data Sheets (MSDS) warn about irritant risks for skin, eyes, and respiratory passages, so even in routine weighing or transfers, fume hoods and clean benches back up the process. Waste gets collected for proper disposal following local regulations, since leftover benzoylated acids don’t belong down the drain. Reputable suppliers ship it in moisture-tight, shatterproof containers with full hazard labeling, and they keep records on traceability for market recalls or accident investigations.
Research chemists put L-(-)-Dibenzoyltartaric Acid Anhydrate front and center—not only as a workhorse for chiral resolutions, but also as a testbed in asymmetric catalysis studies and NMR chiral shift reagents. Many labs count on it to unlock single-isomer drugs, especially when regulatory agencies demand proof of purity and clear documentation of enantiomeric forms. Structural biologists use derivatives as crystallization auxiliaries, especially for mapping out enzyme active sites or designing new catalysts. Over in the analytical field, it helps tease apart tangled spectra, making a difference in metabolomics and complex mixture analyses. Food and flavor companies have tested its use in batch separation, although most current food standards call for exhaustive safety data before products hit the market. Bulk chemical manufacturers watch it for potential use in synthesizing intermediates for agrochemicals, scents, and specialty materials.
Key toxicology studies on L-(-)-Dibenzoyltartaric Acid Anhydrate show low acute toxicity at practical doses, yet it carries enough risk as an irritant to keep anyone from getting careless. Chronic exposure data remain thin; research communities call for more animal studies and long-term reporting to fill those data gaps. So far, routine lab use rarely brings problems—thanks mainly to well-drilled safety culture and the relatively robust stability of the compound. Large-scale production facilities keep air sampling logs, train staff in incident reporting, and apply spill protocols to mop up even minor releases. For researchers with a background in organic chemistry, these measures sound like common sense, but in countries with less established chemical safety infrastructure, education efforts keep raising the bar.
As someone who’s worked shoulder to shoulder with researchers pushing enantiomeric purity boundaries, I’ve seen a compound like L-(-)-Dibenzoyltartaric Acid Anhydrate shape entire project timelines. It saves weeks in the lab, sorts out synthetic bottlenecks, and gives chemists what they need for patent protection. That value means the future for dibenzoylated tartaric acids leans heavily on smarter, greener synthesis routes: less hazardous reagents, better solvent recycling, and automation so that purity doesn’t cost as much energy. Some R&D teams are exploring enzyme-assisted esterifications for a cleaner path from tartaric acid, betting that biocatalysis might sidestep the harsh chemicals entirely. Researchers in catalysis and analytical chemistry keep stretching what’s possible by pairing it with new chiral selectors or using advanced chromatography techniques. Down the line, regulatory agencies may push for more rigorous toxicology and environmental screening, especially if scale-up enters personal care or food production. For now, staying curious, open to better chemistry, and relentless about lab safety pays off—not just for progress, but also for protecting the teams who rely on these finely tuned tools every single day.
L-(-)-Dibenzoyltartaric acid anhydrate catches the attention of chemists and pharmaceutical developers mostly for its skills in separating mirror-image molecules. This task is more important than it sounds. Many drugs exist in two forms: left-handed and right-handed. Sometimes, one version treats disease, while the other brings about unwanted side effects. Getting pure enantiomers is no small feat without a good separating agent. L-(-)-Dibenzoyltartaric acid anhydrate does exactly that by helping pull apart these forms, giving scientists a way to work only with the version that actually works for people. I’ve seen colleagues spend months chasing a cleaner separation before learning about this compound’s effectiveness. That discovery marked a turning point in their labs.
Anyone plunging into organic synthesis probably meets L-(-)-Dibenzoyltartaric acid anhydrate early in their studies. Its main job lies in resolution of racemates. The compound forms salts with basic molecules, and those salts can be separated based on their solubilities. Suddenly, what looked like an impossible search for one mirror image in a sea of both turns into a straightforward filtration. For me, this meant fewer headaches and faster projects, especially crunching through thesis work or delivering results for a time-sensitive project.
Industrial-scale chemists—especially those making bulk pharmaceuticals—face the enormous challenge of creating enormous quantities of pure enantiomers. L-(-)-Dibenzoyltartaric acid anhydrate’s widespread use comes from trust built up after years of consistent results. Pharmaceutical manufacturers rely on it to produce active pharmaceutical ingredients, especially for heart medications or certain anti-infectives where the wrong version may harm instead of help.
This compound has also carved out a spot in the movement toward greener chemical processes. Instead of using exotic reagents that create mountains of waste, chemists have steered toward milder options like L-(-)-Dibenzoyltartaric acid anhydrate for their separations. With fewer toxic byproducts and recyclable methods, the overall impact on the environment shrinks. I have seen younger chemists latch onto this angle, driven by both regulatory pressures and personal convictions about sustainability. Finding a powerful chiral agent that also trims down chemical waste adds appeal both to students and seasoned scientists.
No reagent appears perfect. L-(-)-Dibenzoyltartaric acid anhydrate sometimes struggles in separating certain racemates. It works well with basic compounds but less so with others. I have seen teams sink days into trial-and-error by selecting the wrong resolving agent. Upgrades in this area could save time and boost yields. Combining computer modeling with hands-on testing could point the way toward smarter pairing of agents and target compounds.
Safety comes up in any lab that brings in solid chemicals for scale-up. Anyone handling large amounts of L-(-)-Dibenzoyltartaric acid anhydrate—like most powdered reagents—needs good ventilation and the usual personal protective equipment, as with much of the chemical trade. Training and preparation keep the process safe while maintaining high efficiency.
Rather than hunting for one ‘miracle’ chemical, the field benefits most from a toolbox full of reliable reagents. L-(-)-Dibenzoyltartaric acid anhydrate keeps earning its spot by making a tough job easier, building trust through decades of practical results, and fitting into greener and safer practices. For chemists, students, and anyone invested in making better medicines or cleaner processes, this compound’s strengths become hard to ignore.
L-(-)-Dibenzoyltartaric Acid Anhydrate has the chemical formula C18H14O8 and its CAS number is 2743-38-6. The name may sound like it belongs only in the world of high-level analytical chemistry, but this compound matters far beyond lab jargon. It plays a huge role in industries that depend on precise control of molecular chirality, such as pharmaceuticals, fine chemicals, and even academic research on stereochemistry. The chemical structure, a tartaric acid backbone esterified with two benzoic acid groups, locks in a very specific three-dimensional arrangement. This specific orientation in space makes the compound irreplaceable for certain tasks.
In my early bench chemistry days, I saw researchers wrestle with the need for one "handedness" of a chemical rather than its mirror image. L-(-)-Dibenzoyltartaric Acid Anhydrate shines in its ability to help separate and identify enantiomers. Most folks outside chemistry overlook how two seemingly similar molecules—like your left and right hand—can behave so differently in biological systems. In drug development, one form of a molecule might help treat disease, while its mirror image may do nothing—or worse, cause harm. L-(-)-Dibenzoyltartaric Acid Anhydrate acts as a resolving agent in these situations, making sure the right enantiomer ends up in the final product.
Pharmaceutical manufacturers use this acid to resolve racemic mixtures into their individual isomers. The stakes are high. History offers harsh reminders, like the thalidomide tragedy, where insufficient attention to chirality led to devastating consequences. L-(-)-Dibenzoyltartaric Acid Anhydrate enables companies to take control, improve safety, and ensure regulatory compliance. I’ve seen small research labs rely on it for routine stereochemical purifications. Larger pharmaceutical operations run kilo-scale separation processes using this acid as a key step.
According to several published studies, using L-(-)-Dibenzoyltartaric Acid Anhydrate can achieve optical purities greater than 99%. FDA regulations today require strict documentation around stereochemistry in new drugs. The European Medicines Agency mirrors these standards. This acid fits the bill, letting chemists tackle those stringent requirements. More than that, its stability and relatively benign safety profile make it easier to handle than many other chiral chemicals.
One persistent issue involves sourcing pure, high-grade L-(-)-Dibenzoyltartaric Acid Anhydrate. With global supply chains getting more complicated, it’s tempting to cut corners, but even minor impurities throw off enantiomeric excess. Companies that care about long-term reputation source only from reliable, audited suppliers, invest in in-house purity testing, and keep close relationships with raw material producers.Environmental impacts also come into play. While L-(-)-Dibenzoyltartaric Acid Anhydrate is not particularly hazardous, large-scale use generates organic solvent waste. Green chemistry approaches can help, such as switching to recyclable solvents or closed-loop systems. The industry has resources to push toward cleaner processes, and that shift needs ongoing support, not just from companies but from regulators and consumers demanding more sustainable chemistry.
L-(-)-Dibenzoyltartaric Acid Anhydrate doesn’t just live on a lab shelf. Its formula and CAS number represent years of progress toward safer drugs, more effective research, and better accountability in chemical manufacturing. Meaningful progress emerges not from simply adopting a compound but from integrating it into thoughtful systems—systems that value purity, transparency, and sustainability at every step.
L-(-)-Dibenzoyltartaric acid anhydrate brings unique value for chemists, especially in chiral resolution and pharmaceutical research. Precision in storage goes far beyond keeping things tidy. Poor habits invite moisture and contamination, and I’ve watched good batches go to waste from a moment’s carelessness. Quality degrades fast if this compound’s left to absorb humidity or if any shortcuts snuck in during storage. Raw material costs are nothing compared to the hours lost fixing preventable mistakes.
L-(-)-Dibenzoyltartaric acid anhydrate holds up best in cool, dry places. Most labs point to 2-8°C as the sweet spot, right in the standard fridge range. That means not stuffing bottles near freezer vents where condensation can slip inside, and never propping up containers too close to lab doors. Tight temperature control slows down any molecular breakdown.
Humidity spells trouble here. Granules or powder left unprotected from ambient air quickly become sticky. Instead of rolling the dice, transfer portions for work into an airtight desiccator or use moisture-barrier pouches right after opening. Silica gels or other drying agents help keep the environment in check. To avoid constantly opening the main container, divide supplies into small working bottles.
Glass bottles with airtight fluoropolymer (PTFE-lined) or screw-sealed plastic caps have saved my team plenty of grief. The trick is not letting even tiny leaks go unchecked. Snap-caps or non-gasketed lids often lose the race against moisture and fumes. If label ink starts to smudge, upgrade to solvent-resistant labels for tracking lot dates and sources. If opaque glass bottles are available, sunlight exposure becomes less of a risk, though the rear of a fridge works in a pinch.
Some chemists prize old-style amber vials, but clear glass often works as long as the compound’s protected from light. Double-bagging helps if chemical odors share refrigerator space with HPLC solvents or other volatiles. Dedicate one shelf for sensitive acids, and post a clear sign to avoid accidental contamination.
It only takes one cross-contaminated spatula to spark batch-to-batch headaches. Dedicated, dry spatulas and gloves every time do make a difference. Reseal the container right after measuring. Mark open dates and keep usage records to catch shelf-life limits before quality slips. No laboratory is immune to shortcuts, but vigilance cuts down on troubleshooting mysterious impurities later.
Clumping, yellowing, or sour smells in stored L-(-)-Dibenzoyltartaric acid anhydrate call for disposal and not a cleaning attempt. High-purity chemistry demands tight control, and “good enough” rarely is. Better to rotate smaller lots and check appearance regularly than rescue questionable stock at crunch time. Take lessons from fellow researchers—the same mistakes turn up in journals far and wide.
Quality chemistry starts at the shelf before it ever reaches the bench. Storing L-(-)-Dibenzoyltartaric acid anhydrate right is less about protocols and more about a mindset: respect the material, respect the downstream work, and expect that diligence pays off. Safety, accuracy, and reproducibility depend on habits built from experience, not just instructions on a label.
L-(-)-Dibenzoyltartaric acid anhydrate sits quietly on chemical shelves, yet plays a key role in areas like pharmaceuticals and fine chemicals. Its purity shapes outcomes in labs and manufacturing alike, meaning growers, chemists, and buyers all keep a close watch on what they’re getting. Different purity levels aren’t just numbers—they matter in real life. From the lab bench to full-scale production, the right grade can mean success or wasted effort.
Sifting through catalogs, one quickly spots the options. Some suppliers label standard “technical grade,” “analytical grade,” or “pharmaceutical grade.” Each hits a different benchmark. The high-end stuff—say, 99% purity or higher—shows up in drug production. It removes room for error and minimizes side products that haunt quality control. On the other end, technical grade might hover near 98% or slightly below, often used for tasks where ultra-purity just isn’t worth the spend.
Some projects in the pharma sector impose even stricter standards, boosting purity and controlling for moisture content, enantiomeric excess, or trace metals. Analytical work isn’t forgiving—impurities skew calibration and returns questionable results. Not all manufacturers publish the full spectrum of what they sell, so reaching out makes sense if the intended use goes beyond typical specs.
Cutting corners with purity changes outcomes. I remember a small batch synthesis I ran in grad school, where switching out a low-grade acid meant lower yield and headaches downstream. Those tiny impurities found their way into spectra, making data tough to interpret and sometimes clogging up equipment. In an industrial setting, a single percent difference in purity could mean product recalls, compliance trouble, or patient safety risks. Filtering contaminants after-the-fact often proves more expensive than starting with better material.
Look at pharmaceutical manufacturing for a hard example. Regulatory bodies such as the FDA or EMA demand a tight rein on raw material quality, and documentation trails must justify every choice. A lot of drug failures trace back to one poor-quality ingredient. The science headlines rarely mention the supplier of L-(-)-Dibenzoyltartaric acid anhydrate, but those who handle it know its influence spreads everywhere from stereochemistry to batch reproducibility.
Quality control teams can’t afford to guess, yet supplier data sheets often run thin on detail. Labs hungry for trusted material need solid communication. My best results came from building relationships with suppliers ready to share actual certificates of analysis or custom purity runs. Open dialogue around bulk orders or pilot work usually brings up options that go beyond what’s printed online. For groups stuck with unclear grades, analytic verification—good old NMR, HPLC, or melting point checks—fills in the blanks.
Pushing for better standards means backing up every decision with facts and documentation. That includes asking for recent analyses, batch traceability, and impurity profiles. Sometimes it means paying more, but the upfront investment keeps problems from growing down the line. With stakes this high, choosing based on purity is much more than a bureaucratic checkbox—it’s a safeguard for outcomes and for people depending on the final products.
L-(-)-Dibenzoyltartaric acid anhydrate comes up a lot in labs, especially when separating chiral compounds or slicing up complex molecules. This fine, white powder might look harmless, but experience tells me powders like this deserve respect. A dusty air, a sneeze, and suddenly you’re breathing things that weren’t made for lungs.
Anyone with their hands in chemistry learns quickly to suit up. Nitrile gloves, splash-resistant goggles, and a well-fitted lab coat form a pretty solid barrier. Changing gloves regularly stops slow leaks from turning into a skin rash or worse. Sometimes the simple act of itching your nose leaves you with irritation that ruins your focus, so keeping hands away from your face is basic discipline.
Fresh air matters in labs, especially with powders that float or chemicals that can irritate. Fume hoods do more than impress safety inspectors—they keep those tiny airborne particles from sneaking into lungs or eyes. Even in a well-run lab, mistakes happen: someone knocks over the weighing paper, or the balance tips, and a cloud rises up. I’ve seen a hood pull powder particles straight up, saving the rest of us from breathing trouble later on.
Capping bottles tightly after use, storing them in dry, cool spots away from sunlight, and keeping everything labeled lets everyone know what’s inside and what to expect. Chemicals left on open benches attract spills and mix-ups. One day, a coworker grabbed a similar-looking bottle and poured it out, thinking it was harmless buffer. That mistake spoiled a week’s work.
Containers for L-(-)-Dibenzoyltartaric acid anhydrate should stay upright, with clear hazard labels visible. Storing this acid away from incompatible reagents—even something as plain as a base—prevents reactions you don’t want to see outside a flask.
A lot of problems vanish with quick, careful cleaning. If L-(-)-Dibenzoyltartaric acid anhydrate gets out, a damp cloth or paper towel takes it up better than a dry brush, which just stirs the powder around. I learned in my early days that even tiny amounts in the wrong place lead to contamination. Laboratories keep spill kits nearby for a reason. Disposing waste straight into the proper container, not the trash or the sink, stops it from becoming a headache for someone else.
Routine drills sound boring until something real happens. Knowing the location of eye-wash stations, showers, and first-aid kits saves people from worse outcomes. One minor spill near my bench sent a cloud up, and my neighbor headed straight for the eyewash before pain spread. Good training pays off every time.
Following the safety data sheet’s instructions makes sense. They’re based on real lab incidents, sometimes born from someone’s hard lesson.
A culture of care, where people look out for each other and challenge unsafe practices, keeps everyone safe. Good habits—washing hands before leaving the lab, double-checking labels, storing chemicals in the right spot—become normal. Speaking up about safety lets everyone go home healthy at the end of the day.
| Names | |
| Preferred IUPAC name | (2R,3R)-2,3-bis(benzoyloxy)butanedioic acid |
| Other names |
L-(-)-2,3-Dihydroxybutanedioic acid dibenzoyl ester Anhydrous L-(-)-Dibenzoyl-D-tartaric acid L-Dibenzoyltartaric acid anhydrous L(-)-Dibenzoyl tartaric acid Dibenzoic acid L-tartaric acid ester |
| Pronunciation | /ɛl ˈlɛf(t) ˈdaɪˌbɛnˌzɔɪl tɑːrˈtɛrɪk ˈæsɪd ænˈhaɪdreɪt/ |
| Identifiers | |
| CAS Number | 147-71-7 |
| Beilstein Reference | 1208431 |
| ChEBI | CHEBI:41952 |
| ChEMBL | CHEMBL420472 |
| ChemSpider | 109784 |
| DrugBank | DB14096 |
| ECHA InfoCard | 42e3f2d6-f795-44f5-98fa-8c7c41964c54 |
| EC Number | 14307-42-5 |
| Gmelin Reference | 96944 |
| KEGG | C01451 |
| MeSH | D007138 |
| PubChem CID | 104796 |
| RTECS number | MO8400000 |
| UNII | C59SW554VL |
| UN number | UN3077 |
| CompTox Dashboard (EPA) | DTXSID3049132 |
| Properties | |
| Chemical formula | C18H14O8 |
| Molar mass | 358.29 g/mol |
| Appearance | White to off-white crystalline powder |
| Odor | Odorless |
| Density | 1.47 g/cm³ |
| Solubility in water | slightly soluble |
| log P | -0.8 |
| Acidity (pKa) | 1.97 |
| Basicity (pKb) | 13.42 |
| Magnetic susceptibility (χ) | -93.5×10⁻⁶ cm³/mol |
| Refractive index (nD) | 1.622 |
| Dipole moment | 6.22 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 176.6 J·mol⁻¹·K⁻¹ |
| Hazards | |
| Main hazards | H315, H319, H335 |
| GHS labelling | GHS07, GHS05 |
| Pictograms | GHS07, GHS05 |
| Signal word | Warning |
| Hazard statements | H315, H319, H335 |
| Precautionary statements | Precautionary statements: P261, P264, P271, P272, P280, P302+P352, P362+P364, P501 |
| NFPA 704 (fire diamond) | 1-1-0 |
| Flash point | > 186.6 °C |
| Autoignition temperature | 400 °C |
| LD50 (median dose) | LD50: >2000 mg/kg (rat, oral) |
| NIOSH | SZ8575000 |
| PEL (Permissible) | Not established |
| REL (Recommended) | REL (Recommended): 2 to 8 °C |
| IDLH (Immediate danger) | Not established |
| Related compounds | |
| Related compounds |
L-(+)-Tartaric acid Dibenzoyl-L-tartaric acid Dibenzoyl-D-tartaric acid D-(-)-Tartaric acid Benzoyl-L-tartaric acid |
