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Diammonium citrate hasn’t grabbed headlines like its citrus cousin, citric acid, but it has left its fingerprints across a variety of industries for over a century. Early use rode the wave of organic acid exploration in the 1900s, after the isolation of citric acid itself from lemon juice opened the door to new salts and derivatives. The addition of ammonia to citrate produced this crystalline, colorless compound now found in food additives, pharmaceuticals, and many technical applications. Over the decades, chemists found themselves drawn to diammonium citrate for reasons not just of convenience—its unique blend of properties simply lends itself to practical solutions in real-world manufacturing, especially where acidity control and buffering matter.
Diammonium citrate isn’t a headline grabber, but it sticks around for good reason. The compound appears as a white, odorless solid and dissolves very well in water. The taste profile tends toward mildly acidic, and it shows up under the molecular formula C6H14N2O7, a mouthful that boils down to citrate salt with two ammonium groups. This configuration gives it a stability that citric acid alone can’t always deliver, especially in dry or high-temperature environments. In my experience, technical staff seem to appreciate the predictability during product formulation, as diammonium citrate keeps stubborn pH levels in check and holds out against uneven moisture distribution. It earns its keep in shelf-stable items where consistency matters from batch to batch.
Lab veterans will point out that diammonium citrate stands out for its melting point that sits comfortably above the boiling point of water—handy for most industrial processes. It registers a reasonable solubility in cold and hot water alike, with negligible solubility in alcohol. The salt forms through a straightforward neutralization: mix ammonium hydroxide with citric acid solution, then let the reaction settle out to form crystals upon cooling or evaporation. Not much fluff here—just basic chemistry that hasn’t needed much tinkering over the years because it does the job. Still, what happens after you get the raw material is where most applications start to diverge.
Diammonium citrate has to play by strict rules, especially with regulators overseeing food, beverage, and pharmaceutical ingredients. Most places require clear labeling by common name, chemical formula, and typical purity, with limits on residual ammonia and citric acid to protect consumers. While not glamorous, rigorous standards also keep manufacturing honest: companies must track batch numbers, verify agrarian origins when relevant, and routinely submit to audits. This system may slow innovation, but traceability builds confidence at every step, deepening the trust between producer, safety authorities, and end-users.
Diammonium citrate behaves predictably during chemical reactions, undergoing mild decomposition at high heat to leave behind ammonia and less acidic compounds—one reason it's avoided in processes involving heat sterilization. With the right catalyst or environmental tweak, it can step into more complex syntheses as a protective group or pH buffer. It’s known in the chemical world by several names: diammonium 2-hydroxypropane-1,2,3-tricarboxylate offers the IUPAC touch, while “DAC” or “ammonium citrate dibasic” pop up in manufacturing circles. These synonyms, while technical, help researchers and buyers know they’re talking about the same material, regardless of which catalog or regulatory document they’re reading.
Anyone handling diammonium citrate needs to know the basics: gloves, splash-proof eyewear, and a dust mask keep minor annoyances at bay, since this white powder floats on the lightest current of air and has a way of landing where it isn’t wanted. Industrial safety sheets set exposure limits based on ammonia content, but for most non-industrial uses, basic hygiene holds the line. Spills wash up easily with water, but larger releases can leave slick surfaces, reminding everyone why regular training matters—not just to check the regulatory box, but to send people home in the same shape they arrived.
In practice, diammonium citrate crops up everywhere: in the drinks we grab from the fridge, the medicines we calm our kids with, and even in niche areas like photography and ceramics. The food sector leans on it as a stabilizer, locking acidity into place in soft drinks, jams, and even gelatins. Pharmacies rely on its safe buffering ability to smooth out tricky formulations, especially when alternative salts threaten flavor or stability. In manufacturing, it acts as a chelating agent, especially handy for removing metal ions that disrupt production lines or tarnish final products—a boon for dye houses and metal-finishing plants. Research labs, meanwhile, continue to turn it over in search of new properties in catalysis and sustainable material development, as pressure mounts for greener options in the chemical world.
The chemistry community keeps finding new angles on diammonium citrate, especially with environmental awareness sharpening in recent years. It’s being examined for possible roles in biodegradable packaging, and in water treatment systems where harmless breakdown into ammonium and citrate may have positive knock-on effects, offering an alternative to harsher chemicals. Some research even probes its use in battery technology, though the jury’s still out on industrial viability. Curiosity also drives studies into blending it with other organic salts for specialty medical treatments or biochem labs, always chasing the elusive balance between safety, effectiveness, and cost.
Diammonium citrate’s reputation for low toxicity draws mostly from its two building blocks—citric acid and ammonium—both recognized for their mild profiles at ordinary doses. Food safety authorities set boundaries on daily exposure to keep sensitive populations (children, elderly, pregnant women) far from possible risks. High concentrations, particularly close to eyes or open wounds, can cause irritation. As with many citrates, there’s some mild concern for folks with kidney problems, so doctors occasionally screen for overconsumption when people rely heavily on supplements. Ongoing studies aim to catch subtle side effects, especially regarding ammonia metabolism in populations with compromised liver or kidney function. The safety debate isn’t over, but the compound has earned a track record that stacks up well compared to many other laboratory chemicals.
With the drumbeat for green chemistry getting louder each year, more companies and researchers want scalable, low-hazard substitutes—and diammonium citrate fits the bill. Opportunities open up where older, harsher chemicals lose ground to environmental and workplace safety pressures. Emerging work points to broader use in water softening, slow-release fertilizer coatings, and pharmaceutical compounding. Only time will show how investments in bio-based manufacturing—and changing attitudes toward ammonium salts—shift its status from secondary ingredient to mainstay of sustainable production. There’s no silver bullet for replacing every traditional compound out there, but diammonium citrate shows producers that the industry can still move forward without taking unnecessary risks with safety or the environment.
Diammonium citrate sounds technical, but I see its effects in areas many folks never think about. Often, people contact me as a food writer, asking about preservatives and flavor enhancers. Diammonium citrate falls squarely within those conversations. It’s formed when citric acid reacts with ammonium, ending up as a white, nearly odorless powder or granule. This compound quietly shapes parts of our lives, especially in food, beverages, and occasionally medicine.
During my years working with the processed food industry, diammonium citrate came up frequently as an acidity regulator. Foods like jams, jellies, and sodas rely on subtle tweaks to taste and texture. Diammonium citrate—approved by the FDA—lets manufacturers lower the acidity in some recipes where a more sour profile needs balancing without adding citrus flavor. That matters for recipes that should taste sweet or neutral, and not like lemonade. Its inclusion in some flavor mixes also helped blend the components smoothly, supporting the overall flavor profile without standing out. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has reviewed this compound, marking it as safe at typical consumption levels.
In beverages, its solubility means it dissolves cleanly and won’t cloud the product. Next time you reach for a sports drink or a powder mix, a stabilizing ingredient might be hiding in plain sight—doing its work without drawing attention. Years ago, in a soft drink development session, our team found that diammonium citrate kept the taste consistently punchy, even after shelf storage. That small role makes a big difference in the competitive world of commercial beverages.
Beyond the dinner table, this compound finds a spot in pharmaceuticals. Sometimes, medicine manufacturers use it as a buffering agent in drug formulations. My neighbor, a pharmacist, told me she regularly reviewed ingredients to ensure patients aren’t caught off guard by inactive compounds. Diammonium citrate doesn’t bring dramatic effects, but it helps tablets and solutions remain stable and palatable. For people sensitive to taste or acid levels in medicine, that can smooth the treatment process.
Outside human consumption, it plays a supporting role in textile dyeing, cleaning solutions, and even photography. Its ability to bind with metals aids in developing photos. Years ago, I visited an old-school photo studio and watched as chemicals brought images to life; a technician explained how precise compounds like diammonium citrate protected prints from discoloring over time. The result? Photo albums that survive decades on a shelf.
Concerns about chemical additives often rise during community meetings. Most scientific studies show that diammonium citrate carries a low toxicity risk when used as intended. Long stretches in the food field taught me to look for robust evidence: both the European Food Safety Authority and North American regulators support its use, given strict manufacturing practices.
Folks sometimes worry about synthetic ingredients. Demanding clear labeling and transparent sourcing helps, both as a consumer and as someone who values honest business. Companies could invest in detailed public disclosure, sharing safety assessments and sustainability commitments. Consumers benefit from asking questions and using up-to-date, credible sources when studying what goes into their food or medicine. Nobody wants mystery with their meals—or their medication. Trust grows from open conversations and responsible industry actions.
Diammonium citrate pops up in food production far more often than most people realize. As a white crystalline powder, it helps regulate acidity in drinks, especially those citrus-flavored soft drinks we’ve all had at some point. Sometimes the food industry uses it as a stabilizer for other ingredients. Its chemical structure is pretty simple: combining citric acid from citrus fruits, ammonia, and water.
Safety always matters, so let’s look at the facts. Regulatory agencies, including the US Food and Drug Administration, classify diammonium citrate as Generally Recognized as Safe, or GRAS. The European Food Safety Authority reviews these additives regularly. Current scientific reviews haven't found any reason to think diammonium citrate causes harm at the levels present in food. Animal studies tested relatively high doses and researchers didn’t observe dangerous side effects, so consumers don’t get anywhere close to those amounts from typical foods.
That said, caution should never go out the window. Long-term effects of any food additive can concern some people. I’ve been in enough kitchens and chatted with enough nutritionists to know that some folks are wary of chemical-sounding names on ingredient lists. While much of that worry comes from not knowing what each compound does, it’s a valid reminder for manufacturers to keep things transparent and avoid adding more than necessary.
I see people eating food with diammonium citrate every day without realizing it. Drinks with tangy flavor, powdered beverages, some canned fruits—all use acidity regulators to balance the taste. No one walks out of the store thinking about food chemistry, yet there’s a reason why food scientists choose this specific additive; it works, and it’s considered low risk.
For people with sensitive tummies or kidney problems, speaking with a healthcare provider about ingredient lists makes sense. Citrates, in general, may play a role in managing kidney stones, so individual context always matters. The science says the body breaks down diammonium citrate into small, familiar parts—ammonia and citric acid—both substances that circulate naturally in your bloodstream already.
Trust in the food we eat comes from knowing what’s inside. Whenever I’m teaching food safety, I stress that no authority hands out the GRAS label lightly. Scientific committees dig deep before giving out approvals. Companies must update safety documentation anytime they change how they use the additive or start using it in new foods. Food safety rules require this level of oversight for a reason.
People still worry about “chemicals” in food, and that’s not a rant to brush aside. Honest labeling helps—labels that use plain terms and straightforward language go a long way in earning trust. If companies want happy, loyal customers, they’ll keep pushing for more clarity about every single ingredient, diammonium citrate included.
As a cook and a parent, I think twice about ingredient lists. Most people would rather avoid a cocktail of additives if simple recipes could do the same job. Brands should constantly review recipes and minimize the need for acidity regulators like diammonium citrate. Using less where possible respects people’s desire for simplicity.
Staying informed, reading research, and pushing for transparency keeps us all safer. That’s how we protect our health and pass on better habits to our families.
Every time I’ve handled chemicals in a professional setting, one rule stands out—never cut corners on storage. Diammonium citrate, a salt with uses in food, industry, and labs, fits right into that mindset. Mishandling or poor storage can lead to problems like caking, moisture absorption, contamination, or, worse, accidental reactions with other substances. Too often, workers face risks just because someone overlooked basic storage advice.
Diammonium citrate holds up best in a dry, cool room, away from extremes. Even a little humidity can make this powder clump or dissolve. While it’s not considered flammable, it’s smart to treat it with the same care you’d have for any chemical—store it where water can’t seep in and temperatures won’t spike. I’ve seen bags left near open windows spoil a batch because rain blew in. A steady room temperature, something between 15-25°C, usually keeps the quality intact.
Plastic drums with tight-sealing lids make a world of difference. Think high-density polyethylene or polypropylene, something that won’t degrade easily. Sometimes manufacturers ship diammonium citrate in multi-layer kraft bags lined with polyethylene—if you get those, don’t leave them unsealed or open for easy access. Labeling also goes beyond routine: list the date received, lot number, and potential hazards. Mixing up chemicals on a cluttered shelf never ends well.
One lesson from years in labs and storerooms: never keep incompatible chemicals together. Diammonium citrate gives off ammonia smells in certain conditions and reacts with strong acids and oxidizers. A clearly organized shelving system or designated zone means you don’t have to worry about accidental spills turning into full-scale incidents.
Caked or contaminated diammonium citrate turns into waste—financially and from a safety standpoint. Gloves, goggles, and dust masks should sit right at the entrance to any room where it’s handled. I’ve heard stories about workers brushing dust off their sleeves after knocking over an open container, then realizing they’ve contaminated a clean workspace. Regular safety training and access to plenty of protective gear keep everyone safe.
Storage can pass inspections with flying colors if cleanliness stays a focus. I like to see regular checks where staff look for leaks, spills, and expiration dates. Sweep floors, wipe down containers, and rotate stock so older shipments get used first. Spilled product attracts pests, especially in food-related areas, leading to bigger headaches later.
Introducing humidity control systems like dehumidifiers changes the game in humid regions. Investing in digital thermometers and humidity gauges means problems don’t fly under the radar. Color-coded storage areas keep chemicals apart and make training easier, especially for new staff. Automated inventory systems cut down on mistakes from manual handling.
Environmentally, keeping diammonium citrate stored properly helps prevent leaks into soil or water. Municipal agencies issue fines for chemical spills, but more than that, communities lose trust when improper storage leads to environmental contamination. Using secondary containment trays and spill kits helps reduce the setback if an accident happens.
Good storage for diammonium citrate means keeping it dry, cool, separated from incompatible items, and out of reach from the weather. Regular training and a solid system earn trust from regulators, customers, and staff. In my experience, following these rules doesn’t just keep a workplace safe; it protects everyone involved, from the loading dock to the lab.
Diammonium citrate pops up in places many folks don't expect. Whether someone checks the ingredients on a can of soft drink or flips through the label on dietary supplements, this compound puts in work behind the scenes. Its chemical formula stands as (NH4)2C6H6O7. Those eight elements come together to form a crystalline salt that often provides tang and stability in foods and drinks, plus supports technical processes in labs and manufacturing.
Diammonium citrate builds from citric acid, a familiar face in citrus fruits, and two ammonium ions. That structure lets it dissolve easily in water, which means it works smoothly in solutions—so much easier to blend than gritty powders that won’t budge at the bottom of the glass. In my own kitchen, citric acid and its relatives prove their worth every time I reach for that punchy lemon flavor or notice how canned goods hold steady for months.
Mixing chemistry and everyday experience makes the formula less mysterious. Two ammonium ions (NH4+) and one citrate ion (C6H5O73-) pull together. The combination results in (NH4)2C6H6O7, and that pattern lines up in simple math. Each molecule brings twelve hydrogen atoms—eight from the ammonium, four stuck to the citrate ring. Then toss in two nitrogen, six carbons, and seven oxygens. This isn't just handed down as trivia: people working in quality control, food science, or even preservative development need answers rooted in real chemical balance.
Diammonium citrate isn't just a set of letters on a safety data sheet. In practice, getting the formula right means safe food, reliable products, and fewer headaches for folks working to keep supplies running smoothly. Factories depend on strict measurements of bulk ingredients. If a batch lands off-spec, businesses lose time and money, and sometimes recalls or spoilage follow. Knowing this formula helps avoid expensive slip-ups.
With a strong record as an acidity regulator, it cuts the sharpness of other acids in beverages and prevents spoilage. Every soda company working to land that exact punchy taste needs dialed-in acidity. In nutritional supplements and medicine, predictability means everything. The wrong amount sends the composition askew, leading products off target. Structural fillers, emulsifiers, and flavoring agents each have their own limits and strengths too.
Production cycles crank out thousands of tons of diammonium citrate every year, yet there’s little room for error. If impurities sneak in, byproducts can influence taste, safety, and shelf-life. Any producer controlling citric acid's purity level and proper neutralization with ammonia stays ahead of the game. Good training and modern monitoring equipment pay off. Investing in skills and gear means cleaner outputs, with fewer recalls and better brand trust.
Sourcing high-quality raw materials matters as much as the chemical reaction that produces the salt. Suppliers working closely with manufacturers help avoid cross-contamination and shipping delays. A solid partnership between farmers, chemical producers, and end users ensures safe and reliable citrate. That way, every energy drink, snack bar, or supplement that leaves the warehouse meets the standards families trust on store shelves.
Diammonium citrate pops up in places many folks wouldn’t expect. With a formula of C6H14N2O7, it gets used in food additives, some pharmaceuticals, even in industrial cleaning. Try reading the back of certain sports drink bottles or food labels, and you might spot it listed. Sometimes, the reason manufacturers use these compounds has more to do with chemistry than flavor—diammonium citrate can affect pH, for instance. Working in a chemistry lab early in my career, I remember how minor tweaks with citrate salts kept sensitive enzymes from breaking down. When thinking about safety, these same small tweaks can matter a lot outside the lab too.
Safety depends on where and how you encounter diammonium citrate. Swallowing it in foods at regulated, small concentrations rarely causes problems. Regulatory agencies like the US Food and Drug Administration have cleared it as “generally recognized as safe” (GRAS) for food use. Even so, I’ve seen rare reports of mild stomach upset or diarrhea in sensitive people. Sticking to normal serving sizes closes the door on most trouble.
Pure diammonium citrate—or highly concentrated solutions—pose different risks. Handling the dry powder in industrial settings, workers sometimes get skin irritation or eye redness. Getting some in the eyes feels a lot like getting salt grains in; not dangerous for most, but definitely uncomfortable, and better avoided. My own experience in a research setting taught me to respect all powdered chemicals and keep protective gear nearby. Accidentally breathing in the fine dust—possible during manufacturing or careless storage—can make folks cough or wheeze. The risks ramp up in settings where few use gloves or goggles, or where ventilation gets ignored.
Eating a regular diet that includes only small, regulated doses hasn’t triggered any lasting harm in large studies. Long-term animal studies have not shown clear links to chronic illness, birth defects, or cancer, which provides some peace of mind. But science doesn’t offer a blank check. The bulk of safety studies focus on food use. Not enough gets published about what happens when people breathe the dust every workday, or spill concentrated solutions on hands over years in chemical plants. Experience in similar industries tells me that good safety habits matter even when risks seem low. Regular training and honest dialogue about exposures go a long way.
Simple habits lower risks, both in the workplace and at home. Gloves and safety goggles aren’t only for dramatic TV chemists—they offer a good shield against powders and splashes. Good ventilation prevents dust buildup in small rooms. At food plants, keeping careful records and testing raw materials makes adulteration or mix-ups less likely. Even in home kitchens, reading ingredient lists and sticking to products made by reputable companies helps avoid surprise exposure. Consumer advocacy groups often lobby for clearer labeling too. That makes it easier for people with allergies or sensitivities to steer clear.
Staying current with new research matters. If regulators update daily intake recommendations or flag new hazards, being plugged in helps everyone—consumers, manufacturers, parents—make steady choices. I keep an eye on updates from agencies like EFSA or FDA, and encourage friends and colleagues to do the same. Even with well-studied chemicals, questions always come up about new uses or rare side effects. Responsible companies share their data and safety practices openly. That sets the bar higher for everyone.
| Names | |
| Preferred IUPAC name | diammonium 2-hydroxypropane-1,2,3-tricarboxylate |
| Other names |
Diammonium hydrogen citrate Diammonium-2-hydroxy-1,2,3-propanetricarboxylate |
| Pronunciation | /daɪˌæmˈoʊniəm ˈsɪtreɪt/ |
| Identifiers | |
| CAS Number | 142-18-7 |
| Beilstein Reference | 1694405 |
| ChEBI | CHEBI:63042 |
| ChEMBL | CHEMBL1201651 |
| ChemSpider | 20722 |
| DrugBank | DB11096 |
| ECHA InfoCard | EU0000222004 |
| EC Number | 144-62-7 |
| Gmelin Reference | 32463 |
| KEGG | C18510 |
| MeSH | Diammonium Citrate |
| PubChem CID | 16485 |
| RTECS number | GE9280000 |
| UNII | C5F430UU3F |
| UN number | UN3077 |
| Properties | |
| Chemical formula | (NH4)2C6H6O7 |
| Molar mass | 243.19 g/mol |
| Appearance | White crystalline powder |
| Odor | Odorless |
| Density | 1.4 g/cm³ |
| Solubility in water | Soluble |
| log P | -3.46 |
| Acidity (pKa) | 3.13 |
| Basicity (pKb) | 6.4 |
| Magnetic susceptibility (χ) | \-48.0·10⁻⁶ cm³/mol |
| Refractive index (nD) | 1.47 |
| Dipole moment | 2.74 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 254.8 J·mol⁻¹·K⁻¹ |
| Pharmacology | |
| ATC code | A16AA21 |
| Hazards | |
| Main hazards | Causes serious eye irritation. |
| GHS labelling | GHS07, Warning, H319 |
| Pictograms | GHS07 |
| Signal word | Warning |
| Hazard statements | No hazard statements. |
| NFPA 704 (fire diamond) | 1-0-0 |
| Lethal dose or concentration | LD50 (Oral, Rat): 2820 mg/kg |
| LD50 (median dose) | LD50 (median dose): 2820 mg/kg (oral, rat) |
| NIOSH | WT2975000 |
| PEL (Permissible) | 15 mg/m³ |
| REL (Recommended) | 600 mg/kg bw |
| IDLH (Immediate danger) | Not listed |
| Related compounds | |
| Related compounds |
Ammonium citrate Monammonium citrate Trisodium citrate Citric acid |
