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The chemical world moves forward on the back of forgotten heroes like 1-octanesulfonic acid sodium salt. Born from the larger family of sulfonic acids, this compound started drawing serious interest in the late 20th century as chromatography labs searched for agents that could meet tougher analysis demands. Early pioneers saw how its relatively long hydrocarbon chain made it stand apart from its simpler cousins. In the 1980s, as reversed-phase ion-pair chromatography picked up steam in both research and industry, sodium octanesulfonate found its niche thanks to its ability to influence the separation of tricky analytes. Over time, manufacturers refined both preparation and purification—they needed high purity, not just for instrumental calibration but also to avoid ghost peaks in critical assays. Today, nearly any analytical chemist who spends time optimizing HPLC methods will have handled this salt, whether they realize it or not.
1-Octanesulfonic acid sodium salt looks like a pale, sometimes waxy, powder. Open a new bottle and the contents easily pick up moisture from the air. You’ll catch a faint, characteristic odor, slightly sulfurous, if you pay close attention. It’s sold in small glass bottles or plastic jars—nobody goes through huge quantities at once. High-assay material dominates the market, with most brands promising over 98% purity, which matters as trace impurities can throw off sensitive detections. CAS number 5324-84-5 helps lab staff check inventories and avoid confusion with similar-sounding chemicals. Each vendor stamps a product code and date on the label because shelf life can dwindle if storage gets sloppy. The product usually forms the backbone of HPLC ion-pair reagents and finds occasional roles in cationic detergent studies.
This sodium salt melts between 285-290°C, well above what most heating blocks offer, which signals thermal stability under most lab conditions. With a molecular formula of C8H17NaO3S and a molar mass around 232.28 g/mol, it dissolves freely in water, giving clear, neutral to mildly basic solutions. The hydrophobic octyl tail and the hydrophilic sulfonate head carve out its personality among other sulfonic acids. Some see it as a surfactant-light: not quite detergent-grade, but not too far off. Its electrical conductivity in solution fits right into what chromatographers want for controlling retention times. Keep it dry—after prolonged contact with humid air, caking happens.
Quality usually hinges on purity, moisture content, and color. Top shelf brands run purity checks through titration or NMR. Labs expect less than 1% moisture, as excess water degrades accuracy in preparing mobile phases. Labels flag batch numbers and expiry dates because both regulatory agencies and strict customers won’t accept hand-written notes here. Most regulations in Europe and America ask for a Material Safety Data Sheet in each shipment and hazard pictograms. Since companies don’t want fines or rejected shipments, traceability gets close scrutiny. Some labels list not only the sodium salt but also alternate synonyms and the chemical structure for easy cross-referencing.
Small batch syntheses start by reacting octane (or an octyl halide) with sodium bisulfite under controlled pressure and temperature. Larger manufacturers streamline this by introducing catalytic sulfonation, swapping out batch tanks for continuous reactors. Stringent filtration post-reaction keeps particulates—and unwanted side products—out of the final powder. My own group, trying to optimize cost and yield a decade ago, found that tweaking pH at crystallization matters more than heat or agitation speed. Failure to dial in the right solvent means bland yields and extra washes, driving up the price per gram. Once the product forms, repeated drying under vacuum brings the moisture content down to safe levels.
Lab workers might overlook the tweaks possible with this compound. Despite its apparent simplicity, the molecule enables chemical creativity. Substituting the sodium for lithium or potassium lets scientists explore effects on ionic interactions in separation science. The sulfonic group, being a strong acid, resists hydrolysis, but clever chemists find ways to swap the head for more exotic functional groups, seeking new surfactant or catalyst behavior. Under strong oxidizing conditions, degradation produces octanoic acid or smaller fragments—rarely a goal, but sometimes useful for analytical reference. Reactivity with amines has also produced unexpected adducts in exploratory synthesis, prompting careful log-book entries—and not a few puzzled researchers.
Search for 1-octanesulfonic acid sodium salt, and labs also turn up sodium n-octanesulfonate, sodium octylsulfonate, and sometimes sodium alkyl sulfonate C8. One major chemical supplier calls it “sodium 1-octanesulfonate,” while others prefer old school CAS nomenclature. In European catalogs, translations yield minor mutations, but the core identifier never changes. Students sometimes get tripped up by the difference between “octylsulfonic acid sodium salt” and “octylsulfonate sodium salt”—both mean the same.
Handling precautions pop up early in lab training. Contact with dry powder seldom causes acute problems—though a carelessly wiped face tends to produce mild, lingering eye or skin irritation. The biggest risk comes from inhalation, especially during weighing. I remember one hot summer afternoon, a colleague got too casual and paid the price with a cough that lasted longer than anyone expected. SDS sheets list this salt as non-flammable, non-combustible, and low-toxicity, but nobody wants to tempt fate. Built-in eye and skin protection, proper dust management, and sealed containers cut risk to nearly zero. Disposal runs with neutral pH aqueous waste—landfills and incinerators have no need for added hazards. Per ISO and GHS requirements, shipping labels must declare both the compound and handling class, and most reputable distributors comply with every jot and tittle.
No serious chromatography setup lacks sodium octanesulfonate on the shelves—analysts use it daily to improve separation of basic drugs, amino acids, and pollutants in waters. Its chain length, just long enough to tweak hydrophobic interactions, strikes a balance: too short, you lose selectivity; too long, you cloud the mobile phase and slow down column re-equilibration. Method development for pharmaceutical drugs leans in heavily, relying on this salt to coax sharp peaks from stubborn basic compounds. Clinical labs deploy it monitoring blood plasma markers, where interference from proteins can throw off results unless handled with care. Food and environmental monitoring call on this salt for both routine and regulatory screening. It’s not a cure-all, but in the right mobile phase, it solves tough separation puzzles that keep QC chemists up at night.
Academic groups keep pushing beyond HPLC, seeking new uses for sodium octanesulfonate as a surfactant in aqueous colloid and nanoparticle science. Electrochemists discovered it works as a supporting electrolyte that doesn’t adsorb or foul common electrodes. Enzyme technologists have explored its impact on protein solubility and denaturation. Years back, drug delivery teams saw promise in blending this molecule with lipids to boost solubility for poorly water-soluble drugs, chasing cheaper or novel excipients in tablet formulation. The push for green chemistry has also forced suppliers to revisit the life-cycle impact, with some looking at biodegradable alternatives or reclamation schemes for used mobile phases.
Toxicologists give mixed answers, mostly because laboratory concentrations run much lower than levels tested in animal studies. Acute toxicity clocks in well above amounts encountered in the lab. Chronic oral or dermal exposure studies in rodents don’t show bioaccumulation or pronounced metabolic impact. Still, caution makes sense: sulfonates linger in the environment, and regulators eye persistent organic compounds warily. Past wastewater audits revealed traces of various alkyl sulfonates downstream from pharmaceutical plants, sparking reviews of best practices for disposal and waste management. Current consensus sits at “low but monitor,” and serious environmental labs run tests to spot possible unwanted effects.
Demand for sodium octanesulfonate mirrors the growth in regulatory chromatography around pharmaceuticals, food, and water testing. Driven by stricter detection limits and growing complexity of target analytes, method specialists keep refining mobile phase additives to resolve increasingly crowded chromatograms. Biotech startups show fresh curiosity about custom sulfonates—they want better surfactants for emerging diagnostics and therapeutic carriers. On the environmental side, pressure increases for more sustainable production and full documentation of life-cycle effects. Some labs have begun reclaiming mobile phase salt for reuse, not just for cost savings but also in anticipation of tougher waste discharge standards. New research keeps probing possible bio-compatible modifications that could extend utility into the next generation of analytical and clinical practice.
Walking into any analytical chemistry lab, I usually spot bottles of 1-octanesulfonic acid sodium salt on shelves near the HPLC machines. This is not one of those chemicals that draws much fanfare, but its role speaks volumes in how we separate and analyze stubborn molecules. Researchers like me turn to it as an ion-pairing reagent for high-performance liquid chromatography (HPLC), giving us the power to deal with both polar and nonpolar substances. Strong acids and certain drugs refuse to budge on regular columns, but when this salt enters the mobile phase, their behavior shifts. Ion-pairing boosts interaction with hydrophobic columns, giving analysts those sharp peaks they crave for accurate analysis.
More than a few pharma labs lean on this sulfonic acid salt when they check drug purity or follow strict regulations. Drug molecules with charged groups like amines can be pretty slippery. In my experience, the sodium salt grabs onto those, forming neutral pairs that the column can hold onto for longer. This means better separation of active ingredients from impurities—something the FDA takes seriously. Plants running batch tests on antibiotics or cardiovascular medicines mix this compound in to stay in line with those high standards.
1-octanesulfonic acid sodium salt pulls its weight in food labs too. I’ve worked with teams screening foods for artificial sweeteners or pesticide residues, and those target molecules often play hard to get. The salt’s unique surfactant character becomes a useful tool to coax results out of the system. Small mistakes in sample preparation can hide contaminants, but a dash of this compound in the mobile phase improves both sensitivity and accuracy.
Not every batch of this reagent is equal, and anyone who has run long-term projects knows contaminants in reagents throw off whole series of analyses. Reliable suppliers publish purity data so labs can trust their numbers. Years ago, I learned the hard way that cheap, unvetted sources brought ghost peaks and clogged columns. Citing strict protocols from organizations like USP, I now only buy lots that come with detailed quality reports.
No one should pour these chemicals around without protection. Skin and eye irritation are real risks. Standard lab coats, goggles, and gloves stay on. Proper ventilation keeps headaches at bay. Activities like weighing powder and mixing with solvents go under the hood, following MSDS recommendations. This careful routine ensures the compound benefits the experiment, not the hospital record.
As awareness grows about greener chemistry, researchers keep an eye on less toxic alternatives. Some labs explore biodegradable surfactant options, but performance benchmarks stay high. Until something equally effective comes along, 1-octanesulfonic acid sodium salt remains a workhorse, offering lab workers a balance between reliability and control. Regulators urge regular review of processes, pushing toward less hazardous materials where possible.
Dependable separation is the foundation of credible scientific data. Every time 1-octanesulfonic acid sodium salt delivers clean, reproducible results, it gives regulators, consumers, and companies confidence in what’s on the label and in the bottle. Years of study, hands-on experience, and industry oversight have cemented its place on the lab bench, always ready to face the complex mixes that modern science brings.
Getting handed a tub or flask of 1-Octanesulfonic Acid Sodium Salt brings up immediate practical questions. Anyone stepping into a lab or industrial setting quickly learns that chemical names alone don’t warn you about risks. This powder brings the expected quirks of handling sulfonic acid derivatives, and a few twists that catch the unaware.
My experience working around similar organic acids says: don’t underestimate skin and eye contact. Even with many years under my belt, a little bit of dust managed into a poorly protected spot between my gloves and sleeve once. The next half hour burned and itched. OSA sodium salt won’t eat through your flesh, but repeated exposure dries out hands and leaves skin irritated. It’s not a chemical that coats hands harmlessly like table salt.
The salt dissolves into water or your sweat, and it will sting. Slight inhalation creates a cough, sometimes even a headache. People with asthma report the dust triggers symptoms. Even when you can’t smell anything, the powder floats and lingers—especially when working in dry labs. Workers transferring bulk, chemists preparing buffered solutions, and even people just dumping out glassware need to remember these details.
Official safety sheets say gloves, goggles, and lab coats. Anyone watching closely knows people sometimes fudge the basics. Wearing only nitrile gloves means splashes under the wrist, exposed forearms, or even worse—touching goggles with wet gloves, smearing it across your face by accident. Protective gear isn’t just for chemical spills you see in movies. Simple slip-ups stack up. Washing off quickly seems easy, but you rarely notice the exposure at first.
Eye contact hits the hardest. Getting a powder or solution of OSA sodium salt in the eye brings instant pain. Lab eyewash stations rarely sit within reach unless you work in a well-maintained facility. Small corners of commercial labs often improvise with garden hoses or bottled water. According to the CDC, hundreds of chemical exposure events each year stem from poor access or lack of protective eyewear—this salt doesn’t cause blindness, but it absolutely warrants caution.
Proper ventilation changes the risks. Dust collectors and fume hoods make a difference, especially in crowded spaces. I’ve seen labs cut corners by using fans instead of proper hoods, which only moves dust around. Good ventilation shouldn’t feel optional. Dedicate enough space for chemical mixing and keep food or personal items miles away from those areas.
Good labeling habits stick out. More than once, I’ve grabbed a bottle missing a warning label, only to find out the hard way. Permanent labels and clear instructions hanging nearby become a silent safety net. Storage away from acids and bases, tight cap closures, and periodic inventory checks—these small steps prevent a lot of headaches.
Experience tells me the best defense lies in treating every unfamiliar powder with skepticism. It’s not about paranoia. People new to chemical handling can get lulled into thinking routine equals safety. Every year, I’ve seen complacency lead to accidents. Even old hands sometimes forget a step.
If not certain about a step or protection, ask. Quick questions save skin. Encourage a culture where people don’t hesitate to raise a hand if something feels off. Real safety grows from habits repeated every day and the willingness to look out for friends and coworkers. Handling 1-Octanesulfonic Acid Sodium Salt isn’t rocket science, but skipping small protections can cause big problems.
Working in labs through college and beyond, I've seen one truth hold steady: careless storage triggers more headaches, expense, and risk than anything else. Chemicals either behave as advertised or surprise you, often based on how they get stored between uses. Few things throw a wrench into an experiment faster than realizing yesterday’s bottle spent the night next to a radiator or under a sunny window.
1-Octanesulfonic acid sodium salt acts as an ion-pairing reagent, especially in HPLC methods, and it pops up in many analytical labs and pharmaceutical settings. Clear, white, and sometimes powdery, this salt draws water from the air. It loves humidity, which means it clumps and sometimes changes characteristics over time. Lab staff expect reliability—and that expectation starts with respecting the handling tips for this compound.
Forget the old tricks of sticking everything on a shelf and hoping for the best. To protect the compound’s stability and keep your results solid, store it in a tightly sealed container to block out moist air. I’ve seen more than one lab waste an entire week tracking down why results turned inconsistent, only to learn the desiccant in the storeroom had dried out long ago.
Cool, dry storage matters most. Aim for a spot away from direct light. Room temperature works fine, usually between 15 and 25 degrees Celsius. Don’t stuff the bottle beside corrosive acids, strong bases, or volatile organics—cross-contamination or accidental mixed vapors risk unexpected reactions and pose a hazard to anyone opening those tightly-packed shelves later.
Avoid the temptation to keep the salt near the sink or on open benches. Sometimes, lab routines slip, and humidity creeps up in those areas. A dry chemical cabinet, preferably with a working desiccator or silica packs, keeps performance steady and maintains purity. Even brief exposure to humidity can spoil the rest of the batch. This isn’t overkill—keeping reagents this way spends far less time and money than troubleshooting preventable issues later.
Storing 1-octanesulfonic acid sodium salt incorrectly doesn’t just mess with your lab’s numbers. It risks your team’s safety too. Moist chemicals may stick to gloves and benches, and the resulting residues invite cross-contamination. Mishandled bottles force everyone to question every result, especially in work that depends on pure, exacting reagents (like trace analysis or pharmaceutical QA).
From experience, simple habits work best. Label every bottle clearly with date received and date opened. Rotate older stock to the front, and toss anything that’s caked, yellowed, or doesn’t pour smoothly. Keep a stash of fresh desiccant packets and swap them out before they get saturated. If the compound gets exposed to the air during weighing, work fast, then reseal the bottle promptly.
Responsibility falls on everyone in the lab. Make storage checks a routine part of equipment cleaning days—it isn’t only the supervisor’s job. Training new researchers or interns means teaching these habits right alongside technical protocols.
Smart storage habits protect reagents, research budgets, and people. 1-Octanesulfonic acid sodium salt doesn’t demand a high-tech setup, just steady, dry conditions and a bit of vigilance. Respect the chemistry, and your results—and your colleagues—will thank you for it.
I’ve spent a lot of time digging through lab catalogs and chemical suppliers, and some chemicals get used again and again for a good reason. 1-Octanesulfonic Acid Sodium Salt stands out in analytical labs, especially in high-performance liquid chromatography (HPLC). You’ll find it on plenty of standard supply lists. This compound isn’t just a convenient additive—its unique characteristics are central to a lot of precise laboratory methods.
Chemists like clear numbers. The molecular weight of 1-Octanesulfonic Acid Sodium Salt is 240.31 g/mol. Calculating molecular weight boils down to simple math with the chemical formula: C8H17NaO3S. For history buffs, this salt has shaped workflows since the late 20th century, pushing reproducibility and tuning separation in modern chemistry.
I remember my first chromatography run: I trusted a prep sheet, only to find that someone miscalculated the salt’s addition by relying on the acid form’s weight instead of the sodium salt. Results didn’t match our standards—recovery rates dropped. Using precise molecular weights isn’t just about bookkeeping. It lets labs prepare solutions with confident consistency, hitting the right ionic strength and performance every time. In research, even a couple of grams off can skew results and, in rare cases, put years of work at risk.
Over the years, I’ve talked to colleagues in water testing and pharmaceutical analysis. Most point to the same lesson: details drive reliable science. Using the wrong salt mass usually means weak retention, poor peak shapes, and wasted solvents. It also means researchers need to buy more fresh columns, driving up lab costs that universities and companies try to rein in.
Standard operating procedures (SOPs) save headaches. Double-checking the molecular formula and referencing trusted databases, such as those from the American Chemical Society or Sigma-Aldrich, closes the door on easy mistakes. I also favor electronic lab notebooks that alert when someone enters a non-standard amount, forming a safety net. Vendors like to tout their certificates of analysis, which helps everyone stay on the same page with batch purity and weight.
It doesn’t hurt to brush up on sodium salt nomenclature. The sodium atom isn’t just a footnote—it raises molecular weight compared to the acid. With global lab teams swapping notes online and new researchers entering the pipeline, clear lab guides and labeled bottles can make the difference. During training, walking through exact calculations builds good habits that stick. The benefit shows up in data that’s credible, shareable, and supports confident peer review.
Every detail, including getting a molecular weight right, adds up. In my lab experience, accuracy on small facts like this builds trust in bigger results, and that’s what moves science ahead.
Lab folk working with reversed-phase high performance liquid chromatography (HPLC) often come across certain tongue-twisting reagents—1-octanesulfonic acid sodium salt, for example. This name pops up on reagent lists for a reason: it acts as an ion-pairing agent. Chemists who deal with compounds that don’t “play nice” in standard reversed-phase setups have probably reached for this salt to help separate ionic or highly polar analytes that just won’t stay still on the column.
The real secret power of 1-octanesulfonic acid sodium salt comes from its structure. That long, oily hydrocarbon chain loves sticking to C18 stationary phases, while the charged sulfonic acid head interacts with oppositely charged analytes. It works like a middleman, allowing the column to grab things it couldn’t otherwise handle. This way, analysts get sharper peaks and lower noise, especially with tricky molecules like amines or certain drugs.
Folks working in pharmaceutical and food testing labs use this salt in both routine and specialized ways. Its compatibility isn’t just a theory; published research supports its use for everything from antibiotic monitoring to amino acid quantification. The U.S. Pharmacopeia and other reference texts list this compound as an approved reagent in multiple validated HPLC protocols, further backing its reliability.
Some details always matter. Most commonly, column performance can suffer if the concentration runs too high, as this salt can build up and cause pressure spikes or even shorten column lifespan. Cleaning cycles become more important, and the system may need frequent flushing to prevent ghost peaks. In my own experience, working with municipal water quality projects, we’d monitor for residue not just in the column but in the detector lamp housing. Carryover doesn’t care about your deadlines.
Trouble pops up fast if the mobile phase isn’t prepared carefully. 1-octanesulfonic acid sodium salt demands complete dissolution, and sometimes staff new to HPLC underestimate how stubborn lumps can be. Rolling the bottle with a magnetic stir bar usually does the trick, but stubborn batches can take a while, especially if the lab is cold. Filtering the mobile phase before use cuts headaches downstream—membrane filters rated to 0.45 microns protect the system and your results.
Another consideration—compatibility with different detectors. UV detection works fine, provided the buffer’s absorbance doesn’t interfere. Most of the time, folks stick to wavelengths above 210 nm to dodge baseline drift. Using this salt with mass spectrometry can get tricky, since it causes ion suppression and tough instrument clean-up. Whenever our lab needed MS data, we’d skip ion-pairing or switch to volatile agents instead.
Working hands-on with any sulfonic acid salt brings up the need for good lab hygiene. Spills can get slick; the salt likes to cling to benchtops. Gloves and good ventilation beat improvisation. When disposing of used mobile phases, environmental guidelines matter—municipal regulations in most regions request collection in suitable containers, never an easy pour down the drain. Waiting for city waste pickup might take an extra day, but it keeps waterways free from persistent substances.
Reliable results rely on respecting both the chemical and the HPLC hardware. So, people using 1-octanesulfonic acid sodium salt regularly pay attention to bottle labels, maintenance logs, and waste tags, above all the day-to-day urge to just “run the next sample.” Adoption in the lab grows out of these grounded practices, not just instruction manuals.
| Names | |
| Preferred IUPAC name | sodium 1-octanesulfonate |
| Other names |
1-Octanesulfonic acid sodium salt Sodium 1-octanesulfonate Sodium n-octanesulfonate n-Octanesulfonic acid sodium salt |
| Pronunciation | /ˈoʊk.teɪn.sʌlˌfɒn.ɪk ˈæs.ɪd ˈsoʊ.di.əm sɔlt/ |
| Identifiers | |
| CAS Number | 5324-84-5 |
| 3D model (JSmol) | `JSmol.loadInline("data/mol/OS(=O)(=O)CCCCCCC.C[N+](C)(C)C.[Na]")` |
| Beilstein Reference | 1713883 |
| ChEBI | CHEBI:64069 |
| ChEMBL | CHEMBL1230807 |
| ChemSpider | 83483 |
| DrugBank | DB04125 |
| ECHA InfoCard | 100.007.116 |
| EC Number | 27205-22-7 |
| Gmelin Reference | 8922 |
| KEGG | C01704 |
| MeSH | D017760 |
| PubChem CID | 23665778 |
| RTECS number | GV7350000 |
| UNII | K4B2INM3NA |
| UN number | UN2811 |
| CompTox Dashboard (EPA) | DTXSID8020722 |
| Properties | |
| Chemical formula | C8H17NaO3S |
| Molar mass | 288.37 g/mol |
| Appearance | White to off-white powder |
| Odor | Odorless |
| Density | 1.26 g/cm3 |
| Solubility in water | Soluble in water |
| log P | -2.1 |
| Acidity (pKa) | -2.8 |
| Basicity (pKb) | 12.04 |
| Magnetic susceptibility (χ) | -49×10⁻⁶ cm³/mol |
| Refractive index (nD) | 1.430 |
| Dipole moment | 6.67 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 444.6 J·mol⁻¹·K⁻¹ |
| Pharmacology | |
| ATC code | V03AX |
| Hazards | |
| Main hazards | Causes serious eye irritation. |
| GHS labelling | GHS05, GHS07 |
| Pictograms | ☠️⚠️ |
| Signal word | Warning |
| Hazard statements | Hazard statements: "Causes serious eye irritation. |
| Precautionary statements | Precautionary statements: P261, P264, P280, P301+P312, P305+P351+P338, P337+P313 |
| NFPA 704 (fire diamond) | 1-1-0 |
| Flash point | > 215.6 °C |
| Lethal dose or concentration | LD50 (oral, rat): > 5000 mg/kg |
| LD50 (median dose) | LD50 (oral, rat): 5000 mg/kg |
| PEL (Permissible) | No PEL established. |
| IDLH (Immediate danger) | Not established |
| Related compounds | |
| Related compounds |
Acetic acid Methanesulfonic acid Octanoic acid Sulfanilic acid Tetrabutylammonium hydrogen sulfate |
