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The story of adenosine traces back to the curiosity of early chemists peering into the building blocks of living cells. Researchers like Albrecht Kossel dug deep into the structure of nucleic acids in the late 19th and early 20th century, and their persistent work set the stage for the identification of adenosine. Over decades, the understanding of adenosine moved from basic chemical curiosity to a core role in biochemistry, especially when Dorothy Hodgkin used X-ray crystallography to reveal more about its structure. The groundwork of this era shaped how we now approach synthetic pathways, signaling, and molecular medicine. Today's standard lab synthesis draws on these basics, though improved yields and purification steps replaced clunky, less efficient old-school reactions.
Adenosine shows up in labs as a white or off-white powder, sometimes as lyophilized vials ready for reconstitution. Researchers rely on the precision of chemical suppliers, who now meet quality benchmarks — from pharmaceutical grades to analytical standards. Thanks to decades of study and refinement, labs receive adenosine that fits strict purity profiles. That consistency matters, because scientists use it for everything from standard enzyme assays to delicate in vivo research, and batch variability quickly clouds results.
Adenosine has a molecular formula of C10H13N5O4 and a molar mass of roughly 267.24 g/mol. It appears as a crystalline solid, dissolves in water to give a near-neutral solution, and resists heat better than some similar nucleosides. Melting points hover around 234-236°C, which helps during purification steps like recrystallization. The molecule combines an adenine base with ribose, tethered via a β-N9-glycosidic bond, and carries both hydrophilic and hydrophobic motifs — an architecture that lets it slip across membranes, bind proteins, and signal in unexpected places.
Every bottle of adenosine in a lab carries a clear label with CAS number 58-61-7, purity percentage, batch number, and expiration date. Good labeling does more than guide day-to-day science — it builds trust. Scientists bank on transparent tech specs: typical purity runs at or above 99% (HPLC), with water content, pH, and residual solvents strictly monitored. Lab sheets include the molecular structure, physical data, and supplier testing results, so researchers see any outliers before they affect projects. This level of detail follows not just good practice, but also hard lessons from years of irreproducible research.
Modern synthesis of adenosine often relies on coupling a protected ribose sugar with adenine, using common reagents like trimethylsilyl chloride to guard functional groups during the reaction. This approach sprang from the need to circumvent side reactions that haunted earlier methods. Large-scale synthesis can draw on both chemical and enzymatic strategies, with biocatalysts offering higher specificity under greener conditions. Advances in column chromatography and crystallization then allow separation of pure product from a stew of isomers and by-products. I’ve had seasons with tedious purifications, hands stained by solvent residues, and a deep appreciation for automation when a clean white powder finally came off the column.
Chemists learned to tweak adenosine in countless ways over the past few decades. Methylation, phosphorylation, and halogenation add sites for new biological activity, and these modifications underpin drugs like adenosine analogs for chemotherapy. Adenosine’s structure opens up options for attaching fluorophores, spin labels, or radiolabels for imaging. Some research even swaps the ribose part for other sugars, creating entirely new families of molecules for probing enzyme mechanisms. Each reaction route taught us something — sometimes through costly failure — about the resilience and reactivity of this fascinating molecule.
On a shelf, adenosine carries names from textbooks, biochemistry manuals, and pharmaceutical formularies. Scientists might call it 9-β-D-ribofuranosyladenine, adenine riboside, or just “Ado” in shorthand. In medical pharmacies, it’s often sold under generic or brand names, depending on the formulation. Knowing these synonyms, especially in international research, keeps orders smooth and experiments comparable across continents.
Handling adenosine in research and manufacturing requires careful attention, though its safety profile looks gentler than many organic compounds. Accidental inhalation, ingestion, or direct skin contact can lead to irritation, so personal protective equipment always stays in arm’s reach. Material safety data sheets (MSDS) spell this out, but I learned early that good habits — like avoiding dry scooping powders and always closing reagent bottles — matter more in the long run. Storage in cool, dark, dry places prevents premature degradation, as moisture slowly eats away at purity and shelf life. Laboratories that follow ISO 9001 and GMP guidelines rarely see accidents or unreliable results linked to mishandling.
Applications for adenosine run far and wide. Biologists study adenosine as a signaling molecule in neurology and cardiology, since the body uses adenosine as an endogenous regulator of sleep, vasodilation, and cardiac rhythm. Pharmacologists employ adenosine and its derivatives in antiarrhythmic drugs, while molecular biologists probe its role as a precursor in ATP synthesis and nucleic acid construction. Medical imaging teams inject radiolabeled adenosine to map heart function, and immunologists analyze how immune cells use its breakdown products. In my own experience, a simple adenosine assay clarified ambiguous ATP measurements and changed the direction of three months’ worth of bench work.
Research into adenosine drives progress at the junction of biochemistry, medicine, and synthetic chemistry. Pharmaceutical firms pursue novel adenosine receptor agonists and antagonists for treating conditions as diverse as epilepsy, heart disease, and chronic pain. Scientists develop chemical probes based on the adenosine scaffold for better diagnostics. Ongoing R&D focuses on stabilization, targeted delivery, and functionalization for drug development and imaging. Collaborations between chemists and clinicians push boundaries, as real-world data helps guide which molecular tweaks translate from test tubes to therapies.
Toxicology of adenosine gets more attention every year. High concentrations can trigger cardiac disturbances, bronchospasm, or flushing, especially for people with underlying heart conditions or asthma. Studies in rodents and cell cultures help map out the dose-response curve, distinguishing between therapeutic and risky exposures. Regulatory bodies demand clear toxicology reports before any new derivative reaches clinical trials. My training stressed understanding these risks, since nothing wrecks a promising project faster than overlooked off-target effects.
Adenosine’s future looks bright, fueled by new synthetic biology techniques, more powerful drug-screening platforms, and deeper insights into cell signaling pathways. CRISPR and other gene editing tools pull adenosine deeper into focus as both a research probe and a potential therapeutic pivot. The chance to design new adenosine-based drugs for neurological, cardiovascular, and cancer care brings hope to millions. As labs get smarter about engineered enzymes and “green” chemistry, sustainable synthesis could drive costs down while boosting access in lower-income regions. Much like DNA sequencing transformed medicine, continued work on adenosine may power the next wave of breakthroughs in both healthcare and biotechnology.
Purity always comes up during chemical synthesis, but for adenosine, it’s a dealbreaker. Most scientists I’ve met will squint at a bottle and ask for the certificate of analysis before they even let it near their benchtop. Common talk in pharmaceutical circles points out purity benchmarks at 98% and above. That number is more than lab bragging rights; it separates research-grade material from something fit for a high school classroom demo.
Adenosine plays a role in more than one biological process, from energy transfer in cells to signaling in the brain and heart. Contaminants, even at tiny levels, may ruin those clean pathways or fudge results entirely. Running an assay with impure adenosine muddles the data. My early days helping run enzyme assays taught me this lesson fast: customers would question unexpected results, and many times it all traced back to sloppy raw material.
Chemists track purity using chromatography, mass spectrometry, and NMR. Certificates from reputable suppliers typically cite over 98% purity for adenosine from chemical synthesis. A few high-end providers reach up toward 99% or higher, usually charging a premium. Labs focused on pharmaceutical manufacturing or sensitive diagnostics don’t hesitate to pay the extra for that last percent. Lower grades, like those at 95%, stay out of critical applications. Impurities might sneak through purification steps, leaving things like unreacted starting materials or close relatives of adenosine, which can throw off experiments or, worse, therapies.
I've seen labs get tangled up over what exactly "purity" means. One company’s 98% can differ from another’s. Sometimes it's water content, inorganic salts, or minor nucleoside analogs making up that last stubborn fraction. Real trust grows from suppliers who not only disclose numbers but show their methods and results in detail. That sort of transparency stands out, especially now, when reproducibility is under the microscope across academic biotech.
No one wants to gamble with the credibility of their research. Reproducibility depends on having pure, well-characterized starting materials. Many established labs retest each lot of adenosine upon arrival, confirming purity through their own runs of HPLC or capillary electrophoresis. These steps don’t just catch honest supplier mistakes–they spot sample degradation during shipping or storage. I've worked with several seasoned researchers who set up their own in-house purity checks after a single batch failure led to wasted weeks.
Raw material records and supplier audits play into good lab practice, too. Comparing the COA to in-house results can flag issues early. Most lot failures I’ve witnessed were caught using simple TLC or HPLC screens. With critical projects, it’s always worth pressing for reference spectra and detailed impurity profiles—this separates the trustworthy vendors from the rest.
Raising the purity bar sometimes means investing in better purification steps. Companies using reverse-phase column chromatography, recrystallization, and modern analytical techniques can consistently produce adenosine at or above 99%. They provide not only bulk product but also confidence that the science built on it won’t topple. Researchers and procurement teams can do more than request a COA: demanding detailed breakdowns and setting internal requirements for every project cuts risk.
In the end, a bottle of chemically synthesized adenosine isn’t just a supply item. It’s the bedrock for countless reactions, tests, and sometimes life-saving products. Guaranteed purity isn't a luxury—it’s a requirement, whether measured by numbers on a label or by successful experiments in real labs.
Adenosine shows up in labs across the world, especially where researchers work with nucleosides and nucleotide analogs. As someone who’s handled both routine and sensitive chemical stocks, I’ve found that proper storage can make the difference between a reliable batch and wasted resources. Adenosine isn’t bulletproof: it reacts to moisture, light, and temperature swings. Keeping it safe means researchers get consistent, trustworthy results—lab managers and fellow researchers count on that reliability every day.
Every jar, vial, or ampoule of adenosine deserves careful handling. My own lab always keeps adenosine in tightly-sealed containers, stashed in a cool, dry space. Room temperature rarely cuts it, especially somewhere humid or with a lot of temperature fluctuation. Refrigerators set at 2-8°C or, for long-term needs, freezers around -20°C keep the powder stable for months. I’ve seen vials left out in warm, damp stock rooms degrade fast—cloudiness appears, unexpected reactions creep in, and suddenly the study you worked on for weeks fails without warning.
Light also plays its part. Even indirect sunlight or harsh fluorescent rays can cause adenosine to degrade and break down, especially in a lab lined with glass windows. It pays to use amber vials and airtight jars. Some teams go the extra mile with foil shielding, but a dark, closed cabinet generally works well. I’ve watched colleagues lose weeks of work from batches left too close to a window—something as simple as shutting away a vial can save hours.
One overlooked threat comes from people themselves. Stirring a stock solution with a wet spatula, failing to recap a vial, or placing a tube back with condensation inside can allow water to sneak in. Adenosine attracts water, and contaminated samples can clump or degrade. Every lab needs clear guidelines: dry instruments go in, wet ones stay far away. A label with an “opened on” date has kept me accountable. Without clear recordkeeping, old or exposed stocks quietly rot on the shelf.
Labs with fast turnover or tight schedules sometimes end up storing stocks next to acidic solvents or volatile reagents. Adenosine doesn’t play well with strong acids, oxides, or bases—vapors can creep into inadequately sealed jars. I’ve learned to use secondary containment: plastic or glass storage bins, dedicated shelving, and clear separation from incompatible chemicals. It’s about more than regulatory boxes to tick—unexpected cross-contact kills precision and trust in the science.
Consistency, accuracy, and repeatable results rely on small, daily habits. Refrigerate, shield from light, control humidity, and keep the workspace clean. If something seems off—a weird odor, discoloration, cloudiness—it’s safer to start fresh than to risk everything on a compromised supply. Delivering serious science calls for respect for the basics, not shortcuts. Small lapses cost more than a few grams of chemical; they can sink weeks of work, or lead to faulty data in published research.
Adenosine, a building block for RNA and an energy transfer champion, pulls its weight in both biology and chemical synthesis. Each molecule stacks up to a tidy 267.24 grams per mole. That number comes from adding together the atomic masses for each element in adenosine’s formula—C10H13N5O4. On paper, it sounds like high school chemistry. In the laboratory, this number affects pretty much every calculation, from setting up a reaction to analyzing purity and tracking yield. I remember standing at a lab bench, double-checking the calculation, because a small mistake meant wasted effort and expensive chemicals down the drain.
Lab researchers chase purity and reproducibility, aiming for products that behave predictably each time. Adenosine’s molecular weight sets the cornerstone for all those calculations. Trying to synthesize or isolate a certain amount? That 267.24 figure tells you exactly how much to weigh out, dissolve, or react. Even a fraction of a gram off can sink a project. Mass spectrometry, a method often used to verify structure and purity, will spit out numbers with high accuracy—but only if the reference molecular weight matches up.
Anyone working with adenosine—be it for new drugs, cancer studies, or even food research—leans on molecular weight to scale up reactions and measure dosages. I’ve seen colleagues spend hours prepping stock solutions, double-checking every calculation. The right molecular weight means faith in every subsequent step, whether you’re dosing cells in a petri dish or tracking metabolism. Mistakes don’t stay hidden—they show up later on as poor reproducibility or, worse, as failed experiments that cost both time and money.
Here’s a quick breakdown:
Add them up, and the answer lands at 267.254. For most lab work, people round to two decimal places: 267.24 g/mol. This isn’t just theoretical. Every chemical vendor uses the same standard, so ordering supplies or comparing results with other laboratories stays consistent.
Errors in molecular weight calculations can spiral. Quality control processes root out these slip-ups by testing samples regularly. Automated systems tally the right numbers, but old-fashioned double-checking by scientists catches mistakes that software sometimes misses. I’ve worked alongside technicians who catch errors just by giving each calculation a second look. Documenting the process and peer-reviewing data keeps everyone honest and ensures results stand up under scrutiny.
For those not in the chemistry world, that 267.24 might sound trivial. In a lab, every tiny variation builds up as reactions get bigger. Inconsistent batches create headaches for researchers and manufacturers alike. Teams that commit to precision, from math to measurement, avoid wasting precious resources. The difference between success and failure often hangs on seemingly simple details like molecular weight. Adenosine reminds us—science thrives on the foundation of small numbers done right.
Anyone setting up a cell culture knows how much hinges on purity. Adenosine—the simple little molecule researchers use for everything from signaling studies to metabolic work—plays a key role. The detail that really matters: how was that adenosine made? Heading to the chemical synthesis route often means having more control over supply and price. Labs sometimes save a fair bit with chemically synthesized adenosine, but there’s always one question to ask: are the standards of synthesis matching what sensitive research calls for?
Pure intent can’t hide trace elements left from synthesis. It’s not uncommon to discover impurities, even in reputable lots, which might slip through and show up where you least want them: inside live cell cultures. From my own bench work, unexpected cell responses often led straight back to a reagent lot. Even minor contaminants can derail an experiment or cast doubt over months of data.
Peer-reviewed data backs this up. Published studies and experienced researchers call out the real impact: parts-per-million impurities sometimes change how cells function, especially in stress studies or signaling experiments. A quick look at lab forums shows seasoned scientists asking for batch COAs (certificates of analysis), checking for answers beyond what’s on the standard datasheet.
I’ve seen results wobble after a simple vendor switch. Why? That last trace of starting material or metal ion leftover from synthesis. Highly pure adenosine (analytical or cell-culture grade) costs more, but it’s less likely to bring hidden surprises, cutting down on both false positives and troubleshooting hours. Any time adenosine ends up in direct contact with living material, it needs careful vetting. Companies like Sigma-Aldrich or Thermo Fisher spell out their grade (USP, ACS, or “cell-culture tested”), and I always believe those few extra dollars go a long way in reliability.
Not every project demands the most rigorous purity. Chemical synthesis often works fine in basic assays, certain chemical reactions, or pilot projects. For routine enzyme screening or instrument calibration, chemical by-products probably won’t matter. But as soon as the application touches living matter or feeds into long-term study, purity moves from a “nice-to-have” into a must. That’s where “for research only, not for diagnostic use” shows up on bottles—it signals risk, not a guarantee of quality.
Testing never gets old. I tend to run control assays for new adenosine sources, even from big suppliers. Modern chromatography picks up more than the naked eye and helps prevent headaches later. Also, building relationships with technical reps can open doors to more detailed data on source, lot testing, and even precise batch origin. For the broader research community, pushing for open standards and better disclosure should help raise the quality bar.
In the end, cutting corners rarely pans out, especially when precious cells or months of data are involved. Choosing the right grade, double-checking purity, and sharing experience in the research community lift everyone’s work. It isn’t just about getting adenosine—it’s about letting science stand on solid ground.
Adenosine, used widely in pharmaceutical research and organic chemistry labs, comes in a range of packaging sizes. For years, I worked alongside materials managers, tracking chemicals from order to shelf. Size selection often shapes a lab’s workflow, costs, and safety. Most suppliers offer adenosine in weights starting at 100 milligrams. Tiny vials like these let a research group run a few reactions without overspending, especially if purity and stability matter more than price per gram.
Researchers use 1-gram bottles just as often. I have opened enough of these in university supply rooms to know their place. They fit small-scale synthetic runs and pilot studies, keeping waste low when budgets need careful watching. Since adenosine absorbs moisture, nobody appreciates a big, half-used bottle degrading in the back corner.
Synthesis groups in industry or universities—where repeat experiments and multiple projects run side-by-side—usually seek out the 5-gram and 10-gram packaging. In contract synthesis, concentrations can reach the gram scale quickly. Packaging at this scale balances cost and convenience. Bulk chemical vendors advertise 25-gram and even 100-gram bottles for the highest-throughput users. These packages lower the per-gram cost, which adds up over multiple orders.
I have seen companies request custom sizes beyond 100 grams, especially when producing reference standards or scaling up. At this level, conversations about batch consistency, purity, and shipment become more important than ever. Lab managers put time into qualifying suppliers, since a contamination scare could spoil months of effort and drain budgets.
Ordering too much wastes money. Unused adenosine loses potency, spreads contamination, and soaks up storage fees. I once helped a team dispose of kilos of expired chemicals—an expensive mistake in both money and time. Purchasing too little stalls experiments. Nobody wants to wait for another bottle to cross borders and clear customs. Choosing the right packaging means coordinating among procurement, researchers, and the safety team.
Safety plays a big part. Opening and closing a large bottle repeatedly increases risk for spills, mix-ups, or environmental exposure. Smaller vials lower contamination risks. Regulatory rules also guide the size. Some organizations, focused on compliance and shelf-life, set size limits and require single-use containers.
Smaller packages usually come at a higher cost per gram but provide versatility. Large-scale users can cut waste by consolidating shipments and reducing packaging plastics and glass. Environmental impact gets less attention than price, but in recent years, the labs I worked with have started tracking packaging waste. Shipping fewer, bigger bottles reduces emissions from transport and packaging, helping labs meet sustainability goals.
To reduce headaches, some labs partner with suppliers for automatic reordering based on usage rates. Smart purchasing software tracks lot numbers and expiration dates, reducing expired stock and minimizing downtime. Building a relationship with a reputable supplier, known for quality control and prompt support, makes a clear difference.
In the end, selecting packaging sizes for adenosine reflects the balancing act between research goals, safety, cost, and environmental responsibility. Knowing the scope of work and matching the packaging to it always pays off in quality results and smoother workflows.
| Names | |
| Preferred IUPAC name | 9-β-D-ribofuranosyladenine |
| Other names |
Adenocard Adenoscan Adenosin |
| Pronunciation | /əˈdiː.nəˌsiːn/ |
| Identifiers | |
| CAS Number | 58-61-7 |
| Beilstein Reference | 1721034 |
| ChEBI | CHEBI:16335 |
| ChEMBL | CHEMBL117 |
| ChemSpider | 54626 |
| DrugBank | DB00640 |
| ECHA InfoCard | 03d84a3d-4fd3-4932-8705-67ad098aadfd |
| EC Number | EC 0.0.0.0 |
| Gmelin Reference | 87804 |
| KEGG | C00212 |
| MeSH | D000228 |
| PubChem CID | 60961 |
| RTECS number | AU7350000 |
| UNII | FF4LQIWKJP |
| UN number | UN2811 |
| Properties | |
| Chemical formula | C10H13N5O4 |
| Molar mass | 267.24 g/mol |
| Appearance | White to off-white crystalline powder |
| Odor | Odorless |
| Density | 1.3 g/cm³ |
| Solubility in water | Soluble in water |
| log P | -1.6 |
| Acidity (pKa) | pKa = 3.5 |
| Basicity (pKb) | -3.64 |
| Magnetic susceptibility (χ) | -70.2·10⁻⁶ cm³/mol |
| Refractive index (nD) | 1.76 |
| Viscosity | 1.8 - 2.2 cP |
| Dipole moment | 7.98 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 307.5 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | -1275 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | -3919 kJ/mol |
| Pharmacology | |
| ATC code | C01EB10 |
| Hazards | |
| Main hazards | Harmful if swallowed. Causes serious eye irritation. Causes skin irritation. May cause respiratory irritation. |
| GHS labelling | GHS05, GHS07 |
| Pictograms | GHS07,GHS08 |
| Signal word | Warning |
| Hazard statements | H315, H319, H335 |
| Precautionary statements | Keep container tightly closed. Keep container in a well-ventilated place. Wear suitable protective clothing and gloves. In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible). |
| NFPA 704 (fire diamond) | Health: 2, Flammability: 1, Instability: 0, Special: - |
| Lethal dose or concentration | Lethal dose or concentration: LD50 (intravenous, mouse): 47 mg/kg |
| LD50 (median dose) | LD50 (median dose): Mouse intravenous 31 mg/kg |
| PEL (Permissible) | Not established |
| REL (Recommended) | 0.05 mg/m3 |
| IDLH (Immediate danger) | No IDLH established |
| Related compounds | |
| Related compounds |
Adenine Adenosine monophosphate Adenosine diphosphate Adenosine triphosphate Cytidine Guanosine Inosine Uridine |
