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Calling up the history of sodium tartrate dibasic dihydrate brings up images of old glass jars in 19th-century chemistry labs and the earnest pursuit of understanding tartaric acid’s various salts. Chemists like Louis Pasteur made a name for themselves studying tartaric acid’s stereochemistry, and sodium tartrate’s part in this story shouldn’t be sidelined. Over the decades, the salt found its way into the crossroads of science and industry. The journey mixes quirky laboratory discovery with the grind of industrial production in food, pharma, and research. Going back in time, it’s easy to see why this compound gets overlooked, tucked under more dramatic substances or those with more commercial glitz. Still, those who work with it know the value in the details—stability, solubility, and a certain predictability in reactions.
Sodium tartrate dibasic dihydrate, thanks to that mouthful of a name, doesn’t earn headlines. Scientists recognize it in jars labeled E335 or simply as the sodium salt of tartaric acid. It carries two sodium ions, two tartrate anions, and two water molecules per formula unit—something simple yet packed with subtle benefit. The form that comes out of the bag usually reminds me of coarse white crystals, easily mistaken for more common food seasonings to the untrained eye. Chemists keep an eye on the details, ensuring that labels show not only chemical identity but also water content, batch purity, and any contaminants. Compliance with regulations—be it in food, lab, or pharma supply chains—turns out just as important as knowing what reaction happens next in a flask.
Once you pour out sodium tartrate, you notice the dense, almost glossy crystals. It dissolves in water with the ease that comes from its ionic nature, and this trait never fails to be handy in buffer preparations or control reactions. With a melting point sitting above the boiling point of water, measuring out small quantities in the lab, I’ve always appreciated its stability—staying put where heat and air are concerned. Chemically, this salt behaves itself. This safety and predictability open up wider uses without setting off alarms about spontaneous reactivity.
No magical ingredient goes into making sodium tartrate dibasic dihydrate. It starts with tartaric acid, often a byproduct from the wine industry. Neutralizing tartaric acid with sodium carbonate kicks off precipitation in water—nothing fancy, but it works well. Filtering, washing, and drying finish the job. In practice rooms, researchers sometimes need to tweak the hydration by controlling environmental humidity, reminding us that every detail counts. Chemical modifications—like swapping sodium with other cations or using the tartrate scaffold for chiral synthesis—stem from this same straightforward base. In reaction vessels, sodium tartrate’s gentle chelating power can bind calcium or magnesium, handy in analytical chemistry and industrial processes alike.
Science likes things tidy, so sodium tartrate dibasic dihydrate goes by many monikers. Flip through any chemistry reference, and you’ll see names like disodium tartrate dihydrate, E335(ii), and even Rochelle salt in some muddled cases, though the latter strictly refers to sodium potassium tartrate. Such overlap can confuse. Anyone hopping between research groups and global supply chains sees the value of clear labeling to avoid mix-ups—especially when regulations differ on permissible forms in food, pharmaceuticals, or analytical labs.
No chemist worth their salt ignores safety, even for less dramatic substances. Sodium tartrate scores low on acute toxicity scales, so the primary hazard comes from dust rather than chemical bite. Experienced lab workers know that standard goggles and gloves do the trick. Regulatory documents focus more on product purity and potential heavy metal contamination than acute hazard labeling. Still, anyone moving product across borders must show compliance—with regulatory letters and detailed certificates getting prime placement in every shipment. Audit trails make sure each bag meets the food-grade or analytical-grade expectation, for peace of mind and health.
Most people encounter sodium tartrate anonymously in foods, where it serves as an acidity regulator or sequestrant. Anyone mixing up baking powders or processed foods deals with it, probably without sparing the compound a thought. In research labs, it helps calibrate instruments—its stable crystalline waters providing a reliable standard for measuring water content by Karl Fischer titration. Analytical labs see it appear in qualitative ion testing. In industry, its chelation properties help manage water hardness, making life easier in food processing and chemical production lines. Small research teams keep sodium tartrate around for buffer preparation, a background role with critical benefits.
Every round of research into sodium tartrate dibasic dihydrate seems to find one more corner to explore. New applications keep surfacing in electrochemistry and catalysis, especially as demand grows for greener chemical processes and cleaner food production. Labs with limited budgets like that sodium tartrate doesn’t bleed the wallet dry. Teams studying enantiomers and chiral compounds often run into sodium tartrate as a critical reference standard, continuing the same pursuit Pasteur kicked off more than a century ago. Unlike boom-and-bust chemical commodities, sodium tartrate earns slow but steady advances—one practical idea at a time.
Anyone who’s spent time reviewing toxicological data sees sodium tartrate as a relatively benign player. Massive doses rarely cause harm. Most studies instead focus on contaminants and chronic exposure to impurities from industrial-scale production, especially heavy metals. Regulators pay attention to these points because scale can magnify small flaws. Future work in production aims to cut down on such contaminants further and monitor environmental impact. Expect to see continued improvement in purity for sensitive applications and new research into biodegradable packaging or downstream environmental fate. The broader trend in green chemistry and responsible sourcing favors substances like sodium tartrate, which already have long-established safety records paired with flexibility across sectors.
Sometimes, the oddest-sounding chemicals play a bigger part in daily life than you’d expect. Sodium tartrate dibasic dihydrate catches attention mostly in labs, yet its reach stretches far outside. In my years dabbling with food gadgets and kitchen trials, learning about additives and their place on a label got personal. This particular compound lands on ingredient lists as an emulsifier, stabilizer, and in a curious twist, a calibration standard for instruments.
Open a packet of processed cheese or certain baked goods, and sodium tartrate dibasic dihydrate might lurk in the ingredients list. Big commercial bakeries use it to help doughs behave consistently. Any home baker frustrated with sinking muffins understands why some consistency matters. Sodium tartrate's known for stabilizing pH and binding water, which keeps products fresher a bit longer and keeps textures predictable. In candies or jellies, where sugar crystallization can make or break the final treat, it helps keep crystals under control. That job might sound dull, but without it, many foods just wouldn’t reach shelves with the same taste or shelf life.
Quality control in chemistry and science comes down to trust. I’ve watched lab techs treat their calibration solutions with more care than their lunch. Sodium tartrate dibasic dihydrate sets the standard for Karl Fischer titration, which tracks water in everything from medicine to chemicals. Manufacturers and pharmacists rely on this method to avoid surprise reactions, contamination, or spoilage. If companies don’t measure moisture right, drugs might lose strength or, worse, become dangerous. Sodium tartrate’s reliability in this test isn’t just tradition—it’s earned by years of consistently accurate results. That kind of trust matters when health sits on the line.
People get wary of chemicals in their food, with good reason. Trust gets shaky if ingredients sound engineered. While sodium tartrate dibasic dihydrate is recognized as safe in regulated amounts, oversight is key. Too much can nudge the gut, leading to mild laxative effects—proving that even the helpful things need moderation. Agencies like the FDA and EFSA set strict rules for how much can go in food or pharma products. Consumer watchdogs test and question these limits, sparking debate that helps keep industry transparent. My experience reading long ingredient lists taught me to look past the name and dig into origins and tested safety.
Food companies and labs keep searching for natural alternatives or methods that leave fewer synthetic residues in food. Some turn to plant-based extracts or use physical processing tweaks. Technology brings hope for smarter tests and new ingredients that do the job with less risk. Still, the time-tested role of sodium tartrate dibasic dihydrate won’t fade until those new options prove themselves. As someone who’s tasted both flawless desserts and disastrous kitchen flops, I see the value in both tradition and innovation. Balancing safety, quality, and consumer trust shapes every decision from lab bench to grocery aisle.
Sodium tartrate dibasic dihydrate turns up on food ingredient lists more than most folks realize. Shoppers spot it on packs of jellies, canned veggies, or some bakery products. Chemically, it’s the sodium salt form of tartaric acid, which shows up naturally in plenty of fruits, especially grapes. Manufacturers grab hold of this compound not just for food but sometimes in labs, but the focus here is on your grocery basket.
Every so often, questions hit the table about whether a food additive could mean trouble. With sodium tartrate, food safety authorities—like the FDA and EFSA—have stamped approval for its use as an emulsifier, acidity regulator, and stabilizer. These organizations look at studies, check exposure levels, calculate how much people really end up eating, and go through toxicology reviews. If they spot a problem, they pull the approval. If not, it stays listed as safe for its purpose.
Sodium tartrate’s main food job is to keep textural quality stable or help food hold water. It's not something that draws attention on its own; you don’t taste it, you won’t recognize it from the flavor. The bigger risk often comes from tossing words like “sodium” or “additive” around, spooking consumers for no good reason.
Scientists keep looking for links between common food additives and health worries. Over several decades, studies have dug into sodium tartrate to check for any danger. The research mostly points in one direction: regular consumption through the amounts found in everyday foods doesn’t set off red flags. At high doses given in isolated lab settings, mild laxative effects might pop up, but actual food levels fall well below those extremes.
Something to remember: sodium tartrate contains sodium. Difficulty with sodium crops up in conversations about processed foods, hypertension, or heart issues. But regular dietary sodium intake from tartrate dibasic dihydrate is a drop in the bucket compared to bread, canned soups, or salty snacks.
Reading ingredient labels is a modern ritual. Parents scan for chemicals, adults track sodium, and a growing slice of shoppers keep an eye out for “clean label” claims. Younger consumers, especially, want to understand every word printed on their food. Brands and food regulators can do better jobs explaining the role of these lesser-known ingredients, clearing up confusion instead of fueling suspicion.
In my years attending food science seminars and working with dietitians, the pattern is clear: fear of chemicals usually grows from a lack of context. Food safety training makes a big deal of risk versus dose, meaning tiny amounts of most ingredients—even “chemicals”—rarely create health trouble.
Instead of scaring folks away from ingredients like sodium tartrate dibasic dihydrate, the food world would benefit from simple language and frequent updates about why and how these additives show up in food. Updating school curriculums, outreach by healthcare pros, and fact-based online resources can all make ingredient safety less mysterious.
For anyone looking to lower sodium—due to health diagnoses or personal choice—look at the whole plate, not just one additive. Whole fruits, vegetables, and simple grains still form the backbone of heart-smart eating. Trustworthy food professionals, clear labeling, and publicly available science are the way forward for keeping both taste and safety on the same menu.
Sodium tartrate dibasic dihydrate often looks unassuming—white, crystalline, and similar to many lab salts. Still, treatment of any chemical calls for respect, both for safety’s sake and to keep experiments on track. If a lab overlooks storage rules, purity takes a hit, and so does anyone relying on consistent results. I remember in organic chemistry, a basic error in storing a salt led to moisture uptake and chunking, which messed with our final assay. Few things frustrate like a ruined sample, especially after hours of setup.
One chief problem with sodium tartrate dibasic dihydrate: it will attract water from the air. Not as aggressively as true deliquescent compounds, but moisture makes it cake or dissolve at the edges. If humidity creeps in, weight changes and purity slides. A sealed, air-tight container—think screw-top bottles with a tight gasket—should become standard. Including a silica gel desiccant pack helps further. Routine checks for desiccant color make sure it's pulling in the extra moisture, not just sitting there.
Room temperature serves most labs and research centers best for sodium tartrate dibasic dihydrate. This means about 20-25°C. Avoiding freeze-thaw cycles matters because any extra water produced during warming can pool or promote crystal changes. Heat beyond 30°C doesn’t suit it either; over time, excessive warmth can dry the salt or make it clump. I’ve seen researchers store bottles near radiators for easy access. Believe me, that defeats the purpose and just shortens the shelf life.
Light doesn’t usually break down sodium tartrate. Still, simple stewardship makes a difference. Opaque or amber bottles stop labeling from fading and prevent accidental degradation when other light-sensitive chemicals share the same shelf. Proper labeling means the correct lot number is obvious and tracking across several projects stays simple.
Keeping the bottle out of direct sunlight makes sense. In my experience, strong sunlight heats up bottles and drives unwanted temperature swings. Over time, degradation sneaks in, especially if samples get moved around or stored atop benches.
Cross-contamination often starts with careless hands. Lab techs rushing between benches may dip the same spatula into two different containers. Always use clean, dry scoops every single time. Working with gloves brings down risk, but changing gloves after handling other reagents goes a long way. Don’t return any unused material to the bottle once it’s left—just toss out any excess.
Long shelf life takes some forethought. Mark opening dates clearly, and track how often each bottle gets used. Set aside smaller aliquots for frequent projects, leaving the bulk untouched in a back room or a storage cabinet. Every lab has a shelf for “mainstay” chemicals; sodium tartrate dibasic dihydrate fits there—away from acids and other reactive salts, since even indirect contact with strong acids could affect stability. Choose fresh supplies every few years, especially if quality control matters. Buying from reputable suppliers means getting pure, uncontaminated material in the first place, so skimping rarely pays off.
No one wants failed tests caused by sloppy storage. Building smart habits—sealed containers, tight labeling, scheduled checks—reduces error. It’s straightforward chemistry, but discipline here supports better science, safer labs, and more reliable results every time.
Sodium tartrate dibasic dihydrate shows up plenty of places in chemistry, especially in labs. The formula looks like this: Na2C4H4O6·2H2O. This mouthful shows two sodium atoms, a tartrate ion, and two water molecules attached. Those water molecules are what get called "dihydrate" in the name. Water of crystallization isn’t a decorative extra—the two H2O pieces actually play a role in both the structure and properties of the compound.
Anyone who has made their way through a university laboratory has probably measured out a bit of sodium tartrate dibasic dihydrate. It serves as a primary standard for calibrating Karl Fischer titration, which helps labs find out how much water a substance contains—in products people use every day, like pharmaceuticals and foods. Chemists trust this salt because it keeps its properties stable, dissolves neatly in water, and comes in batches pure enough to build a whole experiment on top.
Lots of substances claim to settle into an exact form every single time, but sodium tartrate dibasic dihydrate actually walks the walk. Researchers have checked molar mass and purity for decades. It stays reliable because the two sodium atoms and tartrate framework don’t swap pieces with the air or fizz away over time. That mostly comes down to those two snug water molecules helping stabilize the powder.
This chemical’s name might not sound familiar in the kitchen, but tartrate-based salts pop up in everything from baking powder to medicines. Here’s an important point: sodium tartrate itself is not seen as toxic in reasonable amounts. Regulatory reviews have covered both its industrial handling and food use, and the compound doesn’t build up or react badly inside the human body. People's direct exposure remains low, though sometimes someone might get a skin or eye irritation if they spill pure powder in a workspace and don’t wash it off. Common sense and solid lab habits (gloves, goggles, running water) handle that risk completely.
People run into some trouble handling large amounts. Sodium tartrate absorbs water from the air over a long day in a humid room, which makes precise weighing a headache if left out too long. To solve this right away, scientists use airtight containers and only open them when they have to.
Disposal presents another routine issue. Pouring solutions straight down the drain goes against most sensible waste policies. Many research departments collect sodium tartrate waste in special bins, then send it along with other nonhazardous salts for responsible processing. This reduces water supply impact and keeps sewer systems cleaner.
Better container materials help extend shelf life, and labs swap tips about minimizing waste. Sodium tartrate dibasic dihydrate hardly grabs attention in the news, yet its consistency quietly trumps flash in many technical fields. All of this proves the value of knowing the simple formula and its habits. Those two extra water molecules don't just pad out the name—they help set the standard across countless experiments every year.
Lab benches collect chemicals the way junk drawers collect random screws, cables, and batteries. A bottle labeled “sodium tartrate dibasic dihydrate” probably doesn’t turn many heads, but anything with a chemical formula deserves respect. After a few years working with reagents that sound as harmless as baking soda—until you break out the safety data sheet—I learned not to cut corners on safety. Sodium tartrate dibasic dihydrate looks like a typical white powder, but safe handling relies on treating it right every time.
Nothing ruins an afternoon like a skin rash or burning eyes. Touching sodium tartrate without gloves risks minor irritation for most people. The dust never asks permission; it drifts into places you wish it didn’t go. Disposable gloves prevent skin from drying out or becoming itchy, especially if the work stretches into long hours. Safety glasses shield against the accidental swoosh of powder when opening new bottles or weighing out portions. For folks with sensitive skin or allergies, gloves and maybe a lab coat matter most. The reality is, no one wants to leave the lab with stinging eyes or red patches.
Chemicals like this one can float in the air longer than you’d expect, especially if you pour or transfer in a hurry. I’ve seen powders form clouds that drift invisibly, only to settle into every crevice. Working under a fume hood or at least a well-ventilated lab bench helps keep the space breathable. Messes multiply quickly, so cleaning spills the moment they happen cuts down on accidental exposures later. Wet-wiping surfaces beats blowing dust into the air with a dry towel.
Leaving a jar unsealed is how humidity sneaks in and ruins both chemicals and the results of your hard work. Sodium tartrate dibasic dihydrate draws in water from the air, clumping into a brick if left uncapped. I learned to snap lids back on and stash chemicals in labeled, designated cabinets. No one wants to play the guess-the-powder game months down the road when a careless label peels off. Keeping things tidy helps everyone using the lab.
One lab mistake early in my career got me reading every label and safety data sheet in sight. These documents explain what to do if powder lands in an eye or a spill trots across the floor. Sodium tartrate usually doesn’t pose dramatic threats at modest scales, but emergencies don’t schedule meetings. Rinsing skin or eyes with running water, and knowing where to find a safety shower or eyewash, can mean the difference between a quick recovery and weeks of discomfort. Emergency contacts posted on the wall give peace of mind to everyone in the building.
Anyone cleaning out an old lab finds random white powders stuffed in back corners. Tossing powders like sodium tartrate in the trash or sink can backfire. Local disposal rules change by county, but pouring stuff down the drain risks both pipes and the larger environment. Asking the facility manager, or checking guidance from environmental health, makes life easier and prevents surprises during inspections. If extra containers pile up, arranging for chemical waste pickup keeps everyone ahead of trouble.
The best labs I worked in had people willing to speak up about safety without making it awkward. If someone sees uncovered chemicals or missing gloves, no one takes offense when reminders come from a good place. Sharing knowledge—from SDS tips to clean-up routines—protects everyone, especially students and new hires. Good habits turn into muscle memory, and safe handling lets you focus on the research, not the risks.
| Names | |
| Preferred IUPAC name | sodium 2,3-dihydroxybutanedioate dihydrate |
| Other names |
Disodium tartrate dihydrate Sodium L-tartrate dihydrate Disodium salt of tartaric acid dihydrate E335(ii) Seignette salt dihydrate |
| Pronunciation | /ˈsoʊdiəm ˈtɑːrtreɪt daɪˈbeɪsɪk daɪˈhaɪdreɪt/ |
| Identifiers | |
| CAS Number | 6106-24-7 |
| Beilstein Reference | 1718735 |
| ChEBI | CHEBI:33319 |
| ChEMBL | CHEMBL135907 |
| ChemSpider | 21448852 |
| DrugBank | DB11089 |
| ECHA InfoCard | 100.042.158 |
| EC Number | 208-573-7 |
| Gmelin Reference | 89336 |
| KEGG | C18697 |
| MeSH | Ditartrates |
| PubChem CID | 24857249 |
| RTECS number | WW9625000 |
| UNII | 8U9D1470D1 |
| UN number | UN2811 |
| Properties | |
| Chemical formula | Na2C4H4O6·2H2O |
| Molar mass | 230.08 g/mol |
| Appearance | White crystalline powder |
| Odor | Odorless |
| Density | 1.79 g/cm³ |
| Solubility in water | Soluble in water |
| log P | -4.35 |
| Acidity (pKa) | pKa 2.98 (1st), 4.34 (2nd) |
| Basicity (pKb) | 4.3 |
| Magnetic susceptibility (χ) | -62.0e-6 cm³/mol |
| Refractive index (nD) | 1.470 |
| Viscosity | Viscosity (dynamic): 1.64 mPa·s (20 °C) |
| Dipole moment | 0.0 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 229.0 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | -1616 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | -1561 kJ/mol |
| Pharmacology | |
| ATC code | A09AA02 |
| Hazards | |
| Main hazards | May cause respiratory irritation. |
| GHS labelling | GHS07, GHS09 |
| Pictograms | GHS07 |
| Signal word | Warning |
| Hazard statements | No Hazard Statements. |
| Precautionary statements | P264, P270, P305+P351+P338, P337+P313 |
| NFPA 704 (fire diamond) | 1-0-0 |
| Lethal dose or concentration | LD50 Oral Rat 4,820 mg/kg |
| LD50 (median dose) | LD50, Oral, Rat: 4,390 mg/kg |
| NIOSH | NJ6835000 |
| PEL (Permissible) | Not established |
| REL (Recommended) | 250 mg/kg |
| IDLH (Immediate danger) | Not listed. |
| Related compounds | |
| Related compounds |
Potassium sodium tartrate Potassium tartrate Sodium tartrate Potassium tartrate monobasic Tartaric acid |
