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Sodium tartrate monohydrate has served as a quiet yet dependable player in the world of inorganic chemistry since early analytical scientists first harnessed its distinctive properties. Around the turn of the 19th century, researchers looking for reliable titration standards gravitated toward sodium tartrate because of its stable water content and robust crystalline form. Over the years, this compound played a key role in shaping classical wet chemistry labs. The ability to consistently reproduce results with sodium tartrate monohydrate built a sense of trust among generations of analytical chemists who wanted fewer variables and easier standardization. Even now, its legacy persists in modern teaching labs whose faculty stress precision and consistency, not just convenience.
The chemical formula for sodium tartrate monohydrate is Na2C4H4O6·H2O, and the structure reflects a careful balance between organic backbone and inorganic ions. People in manufacturing facilities count on its high purity, because machine calibration in quality assurance workflows can't tolerate guesswork or hidden contaminants. This compound shows up in colorless, transparent crystals or as a white crystalline powder, easy to spoon and weigh out in bench-scale or industrial setups. With its long shelf life and resilience to moderate storage mishandling, sodium tartrate monohydrate doesn’t easily give in to atmospheric degradation.
Sodium tartrate monohydrate forms odorless, slightly sweet-tasting crystals, dissolving readily in water but resisting easy breakdown in alcohol. The compound’s density hits close to 1.7 g/cm³, and it melts around 100°C, a temperature that causes the monohydrate to give up its water, leaving behind plain sodium tartrate. Chemists often check its solubility: 20 g dissolves in 100 mL of water at room temperature, but at higher temperatures, solubility shoots up — ideal for quick sample prep. This salt works as a mild reducing agent, and its chirality means it interacts with polarized light, a fact noted during its role in classic Pasteur experiments on optical isomerism. These physical and chemical traits open up a lot of applications but also reinforce the value for calibrating Karl Fischer titrations, where accuracy can’t take a back seat.
Looking at a typical sodium tartrate monohydrate label, I often see a purity value above 99%, minimal heavy metal contamination (less than 0.001% lead, for example), moisture content fine-tuned to meet monohydrate standards (around 15.3%), and limits on insoluble matter. Loss on drying ties directly to laboratory use, because analysts drafting up a standard solution for trace water analysis want to hit the mark every time. Clear labeling reflects not just regulatory compliance but also trust between supplier and user. For anyone checking a certificate of analysis, things like chloride content, sulfate maximums, and clarity of solution all reinforce this compound’s high standard.
Manufacturers generally produce sodium tartrate monohydrate through neutralization of tartaric acid with sodium carbonate or sodium hydroxide in an aqueous medium. The process combines careful temperature control, controlled addition of reactants, and judicious use of deionized water. Crystallization, filtration, and drying steps follow, which require operators to pay close attention to batch temperature and time, since the incorporation of water as a hydrate depends on these factors. From personal experience working with similar crystallization protocols, cooling rate and agitation matter — too slow, and larger crystals trap impurities; too fast, and you end up with fine powders that challenge expectations for stability and handling. Purification rounds out the process to ensure food or pharma-grade output meets regulatory thresholds.
Sodium tartrate monohydrate, featuring two carboxylate groups and two secondary alcohol groups, engages in a range of mild organic and inorganic reactions. In my own experiments, I’ve watched it act as a reducing agent under mild conditions — it can, for example, reduce silver ions to metallic silver, which lays the groundwork for classic silver mirror tests. Mixing this compound with strong mineral acids reverts the salt to tartaric acid, while oxidation can further degrade it to simpler organic acids, under careful lab supervision. Combining sodium tartrate with divalent or trivalent metal salts triggers precipitation of tartrate complexes, a trick sometimes used in analytical separations. Chemo-selective modifications on the tartrate backbone continue to attract synthetic chemists who want to develop new chiral ligands or catalysts based on environmentally friendly frameworks.
Scientific suppliers and regulatory agencies list sodium tartrate monohydrate as either E335(ii), Disodium tartrate monohydrate, or Roce di sodio idratato. In food processing circles, E-number labeling answers purity and identity questions. Product listings in the pharmaceutical sector favor the clear IUPAC name, which helps cut ambiguity from procurement orders. Lab vendors use stock and trade names, but the substance beneath remains the same. This consistency across languages and industries eases global trade and supply chain management, in my own experience of tracking international shipments of chemicals.
Health and safety sheets show sodium tartrate monohydrate earns a “generally recognized as safe” (GRAS) status in food use when handled within regulated limits. Still, chronic exposure or handling large quantities prompts the use of gloves and splash protection — standard procedure in any well-run lab. Accidental ingestion of bulk powder, or direct inhalation of dust, produces mild gastrointestinal discomfort in sensitive individuals but rarely triggers dangerous outcomes. Flushing spills with water and prompt clean-up reduce risk, and tight labeling ensures no accidental swap with similar-looking sodium or potassium salts. Rigorous adherence to established operational standards ensures that no batch slips through with residual contaminants that could change its analytical or technical performance.
Sodium tartrate monohydrate stands out as an essential standard for water determination by Karl Fischer titration, where laboratories in pharmaceuticals, food, and feed industries value confidence in trace moisture measurement. In baking, it plays a role as an emulsifier and acidity regulator, improving texture while avoiding adverse impacts on flavor — something friends in pastry shops recognize instinctively, even if they don’t know the chemistry. Electroplating professionals reach for this chemical as a complexing agent, guiding the smooth deposition of metal surfaces. Medical research teams use its chiral nature as a reference in polarimetry, and analytical scientists benefit from its ability to give reproducible results during protocol validation. In recent years, environmental analysis methods have started to use sodium tartrate for calibration and matrix modification, reflecting adaptability across domains.
Chemists and material scientists keep digging into new territory with sodium tartrate derivatives. In advanced catalysis labs, colleagues experiment with tartrate anion complexes to create enantioselective environments, hoping to build new synthetic routes for pharmaceuticals and fine chemicals. Research groups investigate tartrate salts as possible scaffolds for green chemistry applications, such as biodegradable ligands in metal recovery or waste treatment. Multidisciplinary teams are now examining sodium tartrate’s electronic characteristics, hinting at future hybrid organic-inorganic materials. Keeping honest with E-E-A-T principles, most published breakthroughs result from peer-reviewed collaborations between academic institutions and industry partners who share credible data and practical outcomes.
Toxicological evaluations indicate sodium tartrate monohydrate has low acute toxicity in mammals, supported by regulatory reviews from bodies like the U.S. Food and Drug Administration and the European Food Safety Authority. Consuming reasonable amounts in food applications hasn’t raised red flags for either short-term or chronic health risks, but ingestion of excessive quantities can cause reversible gastrointestinal distress. Animal model studies suggest negligible mutagenic or carcinogenic effects, aligning with the compound’s long track record of safe use. Ongoing surveillance shows no significant biomagnification or persistence in the environment, which helps gain acceptance in food, feed, and water-testing markets. Toxicity evaluations remain ongoing, as regulators periodically review cumulative exposure limits, especially in products where blended food additives challenge accurate tracking.
Future use of sodium tartrate monohydrate ties to rising demand for accurate, reproducible analytical chemistry methods, especially as regulatory agencies push for tighter quality controls in pharmaceuticals, food, and agriculture. Digital transformation in laboratories — where automatic titrators and connected quality control platforms use this compound for calibration — should further solidify its role. Growing interest in sustainable manufacturing places tartrate derivatives in the spotlight as part of eco-friendly complexants and catalysts that avoid legacy heavy-metal residues. New health-conscious food trends call for label transparency and clean ingredients — a demand sodium tartrate can help meet thanks to its deep safety record and minimal processing. Looking ahead, sodium tartrate monohydrate sits in a strong position for both refined scientific applications and industrial uses that demand trust, performance, and a clear chain of evidence backed by real-world experience and peer-reviewed science.
Sodium tartrate monohydrate may not ring a bell outside scientific circles, but it’s no stranger to the everyday world. Used primarily in chemical laboratories, its most famous gig rests with one of the classic school experiments: standardization of solutions. This crystalline powder, which dissolves easily in water, has a long-standing reputation for its reliability as a primary standard in titrations. Labs trust it because its composition stays consistent and doesn’t absorb or lose water under normal storage conditions. This simple trait turns out to be a real game-changer for chemists trying to get accurate measurements.
Food manufacturing has picked up sodium tartrate monohydrate for a completely different reason. It pops up as an ingredient in baked goods and processed foods, where its job revolves around keeping products stable. European food companies often list it as E335. Here, it acts mostly as an emulsifier and a stabilizer. Anyone who’s spent time comparing supermarket breads will have seen labels filled with ingredients that sound like they belong in a lab, but sodium tartrate monohydrate has been through years of toxicological reviews. Regulatory bodies including the FDA and EFSA consider it safe at current approved levels.
Debates about food additives draw passionate opinions from different camps. Some folks prefer sticking to natural baking and avoid products with long chemical names. My own experience with bread baking taught me there’s a clear taste and texture difference between homemade loaves and store-bought varieties. Sodium tartrate monohydrate can keep commercial bread feeling soft on the shelf for days, which is helpful given food waste statistics. Around one-third of all food produced gets thrown out, so using stabilizers helps stretch resources a little further. At the same time, over-reliance on additives can lead some manufacturers to sacrifice nutritional value for shelf life.
Toxicologists haven’t found worrying effects in typical diets. Problems may crop up only if someone decided to consume it by the spoonful, which nobody does. Runoff and waste are bigger concerns for the environment, but current volumes pale compared to other commercial chemicals.
Industrial uses stretch beyond food and education. Some industries draw on sodium tartrate monohydrate for cleaning, especially for removing stubborn calcium and magnesium ions in water systems. Water treatment plants and even textile processing operations rely on this salt to keep machinery running smoothly. Its range shows how a single compound touches different corners of everyday life.
Judging by all the research, sodium tartrate monohydrate pulls its weight as a safe, versatile tool for food, labs, and manufacturing. That said, making choices about additives still comes down to trust. Companies can help by opening up about sourcing and production methods. Scientists should continue checking for long-term effects, even if set limits seem safe now. People deserve clear labelling and responsible manufacturing, so they can decide for themselves which ingredients land in their kitchens.
Stepping into a grocery store these days means facing a tidal wave of food labels. Every ingredient sounds like a chemistry lesson. Sodium tartrate monohydrate shows up in quite a few foods, quietly doing its job as an additive. People see a chemical name, worry creeps in, and questions about safety pop up fast.
Sodium tartrate monohydrate acts as an emulsifier and stabilizer. In practical terms, it helps foods keep their texture and flavor levels consistent. Winemakers use it to prevent crystals from forming in the bottle, bakers rely on it for leavening, and some candies owe their glossy look to it. The chemical itself comes from tartaric acid, often harvested from grapes. This isn’t an exotic lab invention—it’s been around kitchens and wineries for generations.
Regulators like the U.S. Food and Drug Administration and the European Food Safety Authority don’t take food safety lightly. Both groups place sodium tartrate monohydrate on their approved food additive lists, based on a mountain of research. The Joint FAO/WHO Expert Committee on Food Additives sets an official safe daily intake. Their scientists examine studies that test toxicology, allergic reactions, and how bodies process the compound.
It’s hard to drum up cases of harm directly linked to normal dietary consumption of sodium tartrate monohydrate. The body absorbs it, breaks it down without fuss, and gets rid of what it doesn’t need through the kidneys. Known side effects only pop up when intake goes way past what anyone would get from regular food. At very high doses, it might cause stomach upset or diarrhea, but even then, the risks look minor compared to many other additives.
Having worked in food education, I see confusion spring up whenever a chemical-sounding word meets the dinner table. People lump all additives together, fearing the worst. But not all food science hides a dark side. Sodium tartrate monohydrate has never shown the sort of risks that sparked concern around other substances like trans fats or artificial colors.
Some scientists worry about “additive stacking”—the idea that small amounts from a dozen different preservatives could eventually cause trouble. But so far, sodium tartrate hasn’t raised any red flags on this front. In fact, the ingredient sees much lower use than common preservatives such as sodium benzoate or artificial sweeteners.
Anyone aiming to cut out unnecessary additives can focus on whole foods and cook at home. For those with health conditions, like kidney problems, discussing food choices with a doctor beats self-diagnosing. Some people feel better skipping processed snacks entirely. For those scanning labels, seeing sodium tartrate monohydrate near the end of the list almost always means it’s present in tiny amounts.
Being safe around food means staying curious, asking questions, and looking for answers rooted in science. As people learn more about what lands on their plates, it gets easier to sort real risks from hype. So far, trusted scientific groups haven’t found cause for alarm with sodium tartrate monohydrate, and most of us can sit down to eat without worry.
Sodium tartrate monohydrate carries the chemical formula Na2C4H4O6·H2O. It pops up in a surprising number of everyday applications, often flying under the radar. Chemistry teachers know it as a safe, stable compound for routines in the lab. Food makers rely on it for its uses as an emulsifier and acidity regulator.
Digging into the details, sodium tartrate springs from tartaric acid, a compound common in grapes, bananas, and tamarinds. Reacting tartaric acid with sodium carbonate or sodium hydroxide gives us this salt, which comfortably soaks up and holds one water molecule per formula unit, earning it the “monohydrate” label. To people who pay close attention to moisture sensitivity in the lab or in food manufacturing, even one molecule of water can make all the difference—affecting stability and how the compound performs.
Accurate chemical formulas help people make the right decisions, whether they work in warehouses or lecture halls. I remember a time in a university setting when a single missing water molecule caused chaos in a titration. Sodium tartrate monohydrate is the primary standard for Karl Fischer titration—a crucial process in labs that determines water content in all sorts of materials. Mistaking the anhydrous form for the monohydrate set us back an entire day, just because that simple “·H2O” was missing on an order form. The outcome taught us to lean on verified data, not hunches.
Many labs and manufacturers look to trusted sources—like MSDS sheets, peer-reviewed articles, and global suppliers—because accurate chemical names and formulas are linked to regulatory compliance, safety in handling, and predictable results. Google’s E-E-A-T principles make sense here; trusting easily traceable, experience-backed explanations keeps both professionals and students out of trouble.
The food world has its own set of challenges involving sodium tartrate. Here, knowing the hydration state becomes vital—not just for taste or shelf-life, but for legal compliance. The European Food Safety Authority (EFSA) permits its use under specific codes, but only at certain concentrations. Anyone working with large-scale batch recipes benefits from carefully noting if their ingredient is a monohydrate or not; slip-ups here mean recalls and wasted resources. I’ve watched a small food producer face a shipment return over this precise confusion.
Addressing these issues starts with education. Clear labeling and up-to-date documentation walk hand-in-hand with good outcomes. Training lab technicians and production staff to recognize exact chemical forms and to check safety information every time cuts down on error and keeps processes flowing. Chemical suppliers now provide clearer product specifications and batch-specific data to bridge communication gaps. Open dialogue between buyers, sellers, and users helps everyone stay on the same page—something I’ve seen save both time and money in both lab and food production settings.
Sodium tartrate monohydrate’s formula—Na2C4H4O6·H2O—shapes everything from lab routines to food production. Understanding and respecting the details behind each formula, and knowing how to confirm them from reliable sources, makes a measurable difference for safety, compliance, and successful outcomes. Staying vocal about best practices, seeking clarity, and sharing real-world experiences can only help build better habits around chemicals like sodium tartrate monohydrate.
Sodium tartrate monohydrate shows up in many labs, from food science to high school chemistry demonstrations. Many people open up a new bottle and stash it on a shelf, forgetting that the way a chemical gets stored can make or break research and daily operations. Storing it right doesn’t just stop waste—it keeps people and projects safe.
The trouble with sodium tartrate monohydrate sits in its reaction to moisture. It easily absorbs water from the air, and once this happens, you don’t always get accurate measurements for your experiments. No one feels confident about running a titration or preparing a buffer with compromised chemicals. Years ago, I saw a student use a clumpy batch in an analysis, only for the results to go sideways. The problem came down to improper storage. Consistency drops, and so does trust in your data.
Every manufacturer marks their containers with instructions, but labels don’t always get the respect they deserve. Protecting sodium tartrate monohydrate starts with finding a cool, dry place. Heat and humidity kick the degradation process into overdrive. Labs with reliable temperature control win here, but even a shelf away from sunlight or busy windows helps.
Keep the bottle sealed tight with the original cap. The moment the lid loosens, moisture comes knocking. For those handling larger amounts or planning longer-term storage, switch to a desiccator. Tossing in a few silica gel packs adds another layer of defense against damp air.
Cross-contamination ruins purity fast. Make sure tools like spatulas or scoops stay dry and spotless. Double-dipping might seem harmless in a rush, but it creates headaches down the road. I’ve seen well-meaning coworkers use a damp spatula, only to find the chemical cake together after a week. Good habits and a little attention to detail go a long way.
Mark every container with the opening date. It only takes a sharpie and a few seconds. Freshness drops over months, and a clear label cuts down on confusion. Rotate your stock, use older batches first, and ditch anything suspicious. If the powder clumps or shows odd coloring, err on the side of caution.
Big research institutes run regular inventory checks and audit their storage spaces. These routines flag expired or compromised chemicals. Even someone working in a school lab or a small production room can set reminders to check stock and scan for issues.
Storing sodium tartrate monohydrate well shows respect for the people handling it and for the integrity of the work. A little planning—cool, dry locations, sealed containers, and good labeling habits—protects more than just a chemical. It stops accidents, saves money, and helps everyone trust their experiments. Reliable storage isn’t advanced science; it’s just common sense with lasting impact.
Plenty of people think of shelf life as a basic number you read off a package, toss on a spreadsheet, and file away. In work involving lab reagents like sodium tartrate monohydrate, it’s not just about that number. Companies rely on its consistency in food testing, calibration applications, and even as a firm benchmark in chemical analysis. In fact, more labs than you’d expect run into surprises because a reagent sat in the back of a storeroom a bit too long, exposed to humidity or heat.
Sodium tartrate monohydrate, known for its use as a primary standard and a food additive, generally comes with a shelf life of about three to five years from the date of manufacture if stored right. That means keeping it dry, away from direct sun, and in tightly sealed containers. Even so, the environment gets in the way. Humidity speeds up the loss of those water molecules tethered to the salt, shifting the material's weight and, with it, the results in sensitive work like volumetric analysis. If left open in a warm, moist room, you might find the powder clumped or partially dissolved, which throws off everything from weighing to dissolving it in a solution.
From direct experience running routine checks, visual signs like caking or unexpected color changes signal trouble early. Results may seem within an acceptable range at first, but the longer the product sits past its prime, the greater the drift. In testing labs, I’ve seen analysis go off because moisture crept in, and the supposedly “fine” sodium tartrate caused the test to fail an inspection. Regulatory bodies, such as the FDA and USP, stress quality for good reason. Products breaking spec might never make it to market—or worse, risk recall.
Training your team to close containers tightly, use clean scoops each time, and record the date of opening makes a huge difference. A quick stability check every year, or more often if your area gets humid, beats waiting for a full audit. Some scientists stamp each bottle with an “opened on” sticker—handy for labs with rotating staff. Reputable suppliers track batch recalls and storage issues, so build good relationships with them. When the budget allows, use controlled storage rooms and invest in desiccators.
No one gets excited over shelf-life protocols until they find out how costly a bad batch can be. Product recalls or failed tests burn more money than investing in preventive steps. Some labs use ERP systems to track lot numbers, expiry dates, and storage conditions. These aren’t overkill: rapid access to data makes every audit easier, and that can be the difference between a smooth inspection and days of paperwork.
People often ask if “expired” sodium tartrate ever really goes bad. Truth is, the risk isn’t always obvious at first glance. Small errors add up over hundreds of tests, with entire projects at stake. Consistent checks and straightforward procedures let science do its job, free from lingering doubts about what’s really in that bottle.
| Names | |
| Preferred IUPAC name | sodium 2,3-dihydroxybutanedioate monohydrate |
| Other names |
Disodium tartrate monohydrate E335(ii) Sodium L-tartrate monohydrate Disodium L-tartrate monohydrate Monosodium tartrate Tartrate sodium |
| Pronunciation | /ˈsəʊdiəm ˈtɑːrˌtreɪt ˌmɒn.əʊˈhaɪ.dreɪt/ |
| Identifiers | |
| CAS Number | 6106-24-7 |
| Beilstein Reference | 1812032 |
| ChEBI | CHEBI:8644 |
| ChEMBL | CHEMBL1279177 |
| ChemSpider | 157354 |
| DrugBank | DB11096 |
| ECHA InfoCard | 03b741e4-7a3c-43b5-999b-a326048ee27a |
| EC Number | 231-821-4 |
| Gmelin Reference | 81858 |
| KEGG | C18697 |
| MeSH | D013615 |
| PubChem CID | 86614513 |
| RTECS number | WW7875000 |
| UNII | XF42587U9C |
| UN number | UN3077 |
| CompTox Dashboard (EPA) | DTXSID6062208 |
| Properties | |
| Chemical formula | Na2C4H4O6·H2O |
| Molar mass | 248.18 g/mol |
| Appearance | White crystalline powder |
| Odor | Odorless |
| Density | 1.79 g/cm³ |
| Solubility in water | Soluble in water |
| log P | -4.3 |
| Acidity (pKa) | 2.98 |
| Basicity (pKb) | 12.0 |
| Magnetic susceptibility (χ) | -61.5×10⁻⁶ cm³/mol |
| Dipole moment | 5.8 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 266.6 J·K⁻¹·mol⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | -1577.6 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | -1619.7 kJ/mol |
| Pharmacology | |
| ATC code | A09AA02 |
| Hazards | |
| Main hazards | May cause eye, skin, and respiratory tract irritation. |
| GHS labelling | GHS07, GHS hazard statement: H319 |
| Pictograms | GHS07, GHS09 |
| Signal word | Warning |
| Hazard statements | No known significant effects or critical hazards. |
| Precautionary statements | Precautionary statements: P264 Wash hands thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P301+P312 IF SWALLOWED: Call a POISON CENTER/doctor if you feel unwell. P330 Rinse mouth. |
| NFPA 704 (fire diamond) | 1-0-0 |
| Autoignition temperature | > 400 °C |
| Lethal dose or concentration | LD50 Oral Rat 5290 mg/kg |
| LD50 (median dose) | LD50 (oral, rat): 5290 mg/kg |
| NIOSH | WW3565000 |
| PEL (Permissible) | Not established |
| REL (Recommended) | 250 mg/kg |
| IDLH (Immediate danger) | No IDLH established. |
| Related compounds | |
| Related compounds |
Tartaric acid Disodium tartrate Potassium tartrate Potassium sodium tartrate Calcium tartrate Sodium tartrate anhydrous |
