Monoammonium phosphate has played its part in the green revolution every farmer mentions with pride. Companies began producing MAP in large volumes around the 1960s, a time when world agriculture shifted gears out of necessity, partly fueled by higher demand for reliable fertilizer and the desire to push farming yields beyond limits known until then. Even through economic swings, supply chain disruptions, and concerns over environmental impact, MAP always finds a way onto the procurement lists of growers. Industrial MAP is not a flash in the pan, but a response to real challenges faced in cultivation and industrial processing. Early processes for making MAP, based on ammonia-neutralized phosphoric acid, rolled out faster once industrial chemistry matured enough to handle acids safely in high volumes. This growth did not happen quietly—it reshaped how companies approached fertilizer product standards and plant design, since MAP’s solid nature allowed broader distribution and less spillage risk compared to its liquid cousins.
So many plants rely on a balanced diet, and MAP brings both nitrogen and phosphorus to the field. The granules look like small, off-white crystals, which dissolve easily in water. This works well for both direct field application and blending into complex NPK fertilizers. Unlike urea or ammonium nitrate, MAP doesn’t leach away immediately, letting roots dig in over time. Demand from the food sector drives the bulk of usage, followed by fire retardants and use as a dispersing or buffering agent in industry. Handling MAP in a plant or a warehouse doesn’t require exotic equipment, a major reason it has stuck around through decades of agribusiness evolution. Major manufacturers still stamp out MAP under similar names in several countries; local regulations and conditions rarely push for much variation.
This product does not dazzle you with any strange colors or odors. Pure industrial MAP shows up as a crystalline powder, somewhere between white and faint beige, with a slightly acidic taste and a density that allows it to flow well through modern spreading equipment. It starts to decompose only at temperatures above 200°C, releasing ammonia and leaving behind polyphosphates. Solubility in water sits at about 370 grams per liter at room temperature, so it stays concentrated enough for custom liquid applications too. Moisture sensitivity makes it clump up if stored open in humid places, something plant managers always account for in tropical regions.
Quality standards for technical MAP run tight. Plants target a phosphorus pentoxide (P2O5) content of roughly 61% and ammonia-nitrogen (N) content near 12%, with limits on impurities like fluorides, heavy metals, and insolubles. Certificates sheet out all these details, and warehouse managers respect the need to follow GHS labeling: hazard pictograms, instructions for safe storage and handling, and disposal steps. Labels remind workers to avoid getting MAP in their eyes or mouth and to wear gloves to avoid skin irritation. The specs give buyers a snapshot, but field performance reveals the true story—how well it improves crops or integrates with firefighting agents.
Industrial MAP production lines start by mixing ammonia with purified phosphoric acid. The process requires a steady hand and constant monitoring, since even a small slip in acid concentration or mixing rate can mean impurity spikes or off-grade granules. Operators use batch reactors or continuous systems complete with heat exchangers, emission scrubbers, and dust collectors. Most production runs finish with drying, screening, and quality checks to weed out undersized or off-color product. In my own work following these lines, attention to housekeeping and regular equipment cleaning proved essential, as dust build-up increases not just loss but also the risk of workplace accidents or product cross-contamination.
Monoammonium phosphate, NH4H2PO4, forms from a direct neutralization between ammonia gas and phosphoric acid. Known for its chemical stability, MAP can take part in other reactions as well; heating breaks it down, feeding the synthesis of polyphosphate compounds. Companies also use MAP as a model reactant to prepare tailored phosphate blends, or to tweak pH in certain industrial processes. Firefighting foams and powders often combine MAP with extra silicates to give it better sticking power, especially for class A and B fires. At a chemical plant level, the team constantly experiments with modifying particle size or coating the product to match end-use requirements, tweaking the formula to boost breakdown in soil or prevent unwanted dust drifting during application.
Many know MAP by other names: ammonium dihydrogen phosphate, NH4H2PO4, or sometimes as simply “ammonium phosphate, mono-”. Its industrial grade also turns up under brand names tied to fertilizer companies, such as “MAP 11-52-0” (denoting 11% nitrogen and 52% phosphate expressed as P2O5), and often just “fertilizer grade MAP” in order forms. In academic articles, the chemical name comes through, but at the warehouse door, brand or simple technical MAP tags are common. Regulatory paperwork can list it under CAS number 7722-76-1, a fact known mostly by safety officers and those handling customs documentation.
Working with MAP day in, day out means understanding more than just its NPK value. Storage always stays dry, ventilation routines become a daily check, and managers drill crews to avoid mixing MAP with alkalis, oxidizers, or strong reducing agents, which could create unexpected hazards or unwanted product breakdown. Fire safety teams trust that MAP actually helps smother flames, but inhaled dust irritates lungs and long-term exposure without proper PPE can trigger mild allergic responses or aggravate existing asthma. Emergency eye washes and hand wash stations are as critical for MAP as for harsher chemicals, and periodic audits ensure that accident rates stay low even with large stockpiles present.
MAP touches more ground than people notice. Agriculture claims the biggest slice, used on cereal fields, fruit groves, and industrial-scale vegetable operations, both for planting and side-dressing during the season. The firefighting sector counts MAP-based powders among their first line of defense in wildland and urban blazes; I’ve seen MAP save the day by cutting off fire spread through a dry grassland in peak summer. The chemical industry still leans on MAP for uses in water treatment, ceramics, additives for cleaning agents, and as a dispersant in pigment production. Each sector uses the same base compound but adapts application methods, packaging, and even grade specifics for their own routines, depending on climate, soil makeup, and industrial needs.
Labs and pilot plants chase ways to make MAP more effective and environmentally responsible. Recent work explores controlled-release coatings that reduce risk of phosphorus runoff, a big concern in eco-sensitive watersheds. Soil scientists and agronomists work hand-in-hand with chemical engineers to design MAP blends that match particular crop demands, improving root uptake efficiency and minimizing the need for extra fertilizer passes. The shift to green chemistry also pushes suppliers to adopt energy-efficient synthesis routes, recover waste heat, and recycle acidic vapors instead of venting. In fire safety, R&D teams test new MAP composites that stick longer to burning surfaces or that biodegrade quickly once the danger passes, reducing long-term residue concerns. These efforts aim not just for better margins, but for improved safety and cleaner soil and water.
MAP delivers nutrients, but toxicity worries don’t vanish. Few people face acute risk with normal use, but chronic runoff into waterways can trigger algae blooms that choke aquatic life and alter delicate freshwater ecosystems. Inhalation studies with high concentrations point to mild respiratory irritation, especially in poorly ventilated facilities. Skin contact, for most, means only a passing itch, but allergic or sensitive individuals—something never quite clear until it’s too late—can develop persistent rash or bronchial symptoms. Environmental monitoring programs track phosphorus drift and accumulation, spurring ongoing discussion about regulatory controls. Researchers also test MAP’s breakdown products in the soil and food chain to guard against unintended consequences, not always detected in short-term lab work but obvious over growing seasons and repeated land application.
MAP’s future rides on a fine balance: rising food demand versus environmental responsibility. Companies already seek smarter blends, often pairing MAP with organics or micronutrients for high-performance, site-specific fertilizations. Policy shifts in major agriculture regions, especially tighter discharge limits for phosphorus, force producers to innovate or risk losing markets. Adoption of precision agriculture guides more targeted MAP applications, reducing waste and letting each granule do more work. In fire management and industry, competition from alternative phosphate and nitrogen sources stirs up a constant cycle of innovation—new spray systems, additive tweaks, better packaging to cut both spoilage and user exposure. MAP won’t disappear anytime soon, but only firms flexible enough to keep up with farmer feedback, climate data, and regulatory signals will keep it relevant in a shifting global market. Those who pay attention to both the chemistry and the field—where the product meets real-world dirt, deadlines, and disaster—will drive the next chapters for this workhorse compound.
Walk into any fertilizer plant, and sooner or later, piles of white granules catch your eye. That’s MAP, monoammonium phosphate, doing its job where it counts. Ask around, and you’ll hear the same thing: for industrial grade MAP, the main action isn’t on farms but inside factories that churn out firefighting solutions, specialty cleaners, and certain chemicals. Most folk hear “phosphate” and picture endless rows of corn. Industrial MAP, though, plays a bigger part away from the fields.
If you’ve popped open a fire extinguisher case, you’ve dealt with MAP up close. It’s a primary ingredient in ABC fire extinguishers. Factories spin MAP into fine powder, and that powder works better than most at snuffing out class A (trash, wood, paper), class B (liquids), and class C (electrical) fires. A big fire risks lives, property, and business downtime. Good extinguishers, powered mostly by MAP, keep that from happening. According to the National Fire Protection Association, over 70% of hand-portable dry chemical extinguishers use MAP as the backbone because it stops flames cold and won’t conduct electricity.
Outside the danger zone, MAP goes into some niche but important cleaning agents. Factories that make detergents use MAP to buffer and adjust the acidity. MAP helps break up grime but leaves no harsh trace on metal. Making specialty chemicals or certain coatings? MAP steps up as a phosphorus source with fewer impurities. Chemical plants lean on it when they want a consistent, dependable reactant. This reliability isn’t flashy, but ask anyone working in quality control—MAP gives results they can bank on with every shipment.
Every so often, you hear about supply constraints for phosphorus-based materials. One bad growing season on the mining side, or a pileup at a port, and downstream industries feel it. MAP helps keep the wheels moving because it packs a lot of value into each ton shipped. In my years working with manufacturers, I learned fast that folks keep an eye on MAP prices and availability the same way bakers watch the cost of flour. Even a blip can ripple through cleaning product lines and extinguisher makers. Industrial MAP supports these everyday products most people rely on, even if they never notice it.
Industrial MAP doesn’t grab headlines, but steer it wisely and it solves real-world problems. Producers face tighter environmental rules—wastewater, dust, and reminiscent phosphate discharge all cost money and time. Investing in cleaner MAP production (think acid recovery, scrubbing tech) has paid off for a few big players. It’s not simple, and it takes time and upfront spending, but improvements trickle downstream: cleaner products for firefighters, less residue in cleaners, and fewer supply headaches overall.
Everyone who deals with MAP, from chemical engineers to firefighters, cares about consistency and safety. Companies that cut corners with low-grade material risk more than bad PR—they face recalls and regulatory trouble. Factories I’ve worked with say sticking with reputable suppliers, testing mixtures, and keeping lines of communication open up and down the chain comes out cheaper in the long run.
Industrial MAP isn’t just about feeding crops. Its biggest mark sits in silent protection—quieter, cleaner factories and safer moments for people facing fires or chemical spills. Every batch packed and shipped means another day’s work made just a little steadier for the folks behind the scenes.
Map out any fertilizer warehouse and you’ll probably spot bags labeled "MAP" in big letters. This stuff, monoammonium phosphate, forms the backbone of the fertilizer world, especially where folks want to boost crops with a solid shot of both phosphorus and nitrogen. The big question isn’t just what MAP is, but what's actually inside these industrial-grade bags as they sit on loading docks around the world.
The recipe for industrial-grade MAP usually focuses on two main ingredients: ammonium phosphate and a bit of moisture. Numbers rarely lie, so you’ll often see MAP advertised with about 11% nitrogen (N) and 52% phosphorus pentoxide (P₂O₅). In practice, that gives you a product guaranteed to deliver these values or just a hair above for a margin of safety. Moisture content hangs around 1-2%, since drier materials reduce clumping and transport headaches.
Dust off the technical data sheets and you’ll see manufacturers target a purity between 92% and 95% for industrial MAP. This metric matters because impurities can cause headaches for farmers and industrial buyers alike. Excess sulfate, chloride, or calcium drags down performance and clogs up equipment. Most quality products push impurities well below 5%, which meets most industry needs and keeps complaints to a low roar.
Producers rarely talk about impurities in bold type. Still, impurities slip into the mix from raw phosphate rock, process water, and even the factories themselves. Chloride and fluoride show up in small doses—usually less than 0.5% each. Too much chloride hurts sensitive crops and excess fluoride can also build up over time, causing headaches for downstream buyers who care about environmental controls. Heavy metals like cadmium and lead tend to hover in the low parts per million, but nobody wants those numbers to creep up, especially as export markets crack down.
Beyond plant growth, these impurities impact corrosion in storage bins and wear down conveyor belts. In high-stakes industrial setups, pushing for cleaner MAP isn’t just a luxury—runaway corrosion or fouling can shut down whole operations. From my time consulting with small mills and handling fertilizer samples in the field, I watched managers scan the technical sheets not just for the main nutrients, but for sodium, magnesium, and even vanadium—tiny details that spell trouble over time.
Improving purity comes back to the source. Cleaner phosphate rock and tighter manufacturing controls usually push purity above 95%. But costs climb, so most plants settle at levels that meet global benchmarks—enough for safe transport and good plant uptake, but without overengineering. Better water treatment and upgraded filtration systems help keep heavy metals at bay. Some firms oversize their washing steps or add extra separation to scrape out silica and dust.
As local guidelines get tougher, especially in Europe and parts of Asia, plants have started sharing more details and even certifying low-cadmium product lines. That’s a shift I see gathering steam, since nobody wants to get shut out of key markets.
I’ve watched old-timers sniff bags and scoop samples straight off the railcar, judging quality before ever sending samples to a lab. At the end of the day, farmers demand value and safety, while processors want machines that last. Keeping a close eye on what’s really inside each load of MAP makes all the difference—both for yield and for peace of mind.
Monammonium phosphate, better known as MAP, pops up in discussions about both agriculture and safety gear. Farmers count on it to feed crops, and its chunks land in fire extinguishers, especially the dry chemical types you see in offices and kitchens. From the outside, it looks like the same white powder, but swapping its role from fertilizer to fire suppressant deserves some attention.
MAP’s roots in agriculture run deep. It brings plants both nitrogen and phosphorus—two nutrients that keep fields green. Every bag loaded into a spreader means another try at big yields and healthy roots. Whether someone grows wheat, corn, or even turf grass, MAP can mean the difference between a slow-growing plot and a thriving one. The process is pretty straightforward: pellets sit in the soil, water dissolves them, roots suck up the goodness, and another season rolls on.
Fertilizer plants go to great lengths to ensure their product works in all types of soil. They watch out for dust, granule size, and chemical balance. Any contaminant, even in trace amounts, can mess up an entire crop. On the field, the main worry is feeding the plants, not fighting flames. There’s little risk to people’s lungs or eyes because the product stays below knee height and gets watered down fast.
Fire extinguishers line up against a different enemy. As a powder, MAP blocks out oxygen and interrupts chemical reactions that keep flames going. This use only works because companies treat and test MAP to strict standards. That means making the particles fine but not too fine. Caking, clumping, or picking up water from the air would leave the extinguisher useless in a crisis. MAP for extinguishers goes through anti-caking agents and extra drying—steps that simple fertilizer-grade MAP skips.
During a fire, people spray big clouds of this powder indoors, often close to food or electronics. In my own experience as a safety volunteer, I’ve seen the mess left behind: covering the counter, stuck in keyboard keys, coating everything nearby. Breathing in fire extinguisher dust makes throats raw and eyes sting. Imagining farm-grade MAP, possibly with smaller or larger pieces, stray contaminants, or even more dust, brings real concerns.
Some folks ask if they can buy a bag of cheap fertilizer at the hardware store and refill their wall extinguisher. The simple answer: that’s a risky move. Agricultural MAP runs cheaper and ships in bigger loads. Yet it isn’t filtered or processed for safety. If someone takes a shortcut here, they could wind up with a gadget that fails when fire breaks out—a worst-case outcome for any home or business.
On the flip side, using fire extinguisher-grade MAP in the soil costs more without adding any extra benefit for the plants. It’s better to stick with the experts: let fire safety brands make tools for emergencies, and let farmers boost their fields with tried-and-true ag products. Each specialty demands careful handling for reasons tested by both science and experience.
Clearer labeling on both fertilizer and fire extinguisher products would cut confusion. Stores can remind shoppers why the difference matters, especially near bargain bins or seasonal sales displays. Fire safety authorities might release guides or quick videos, showing why professional extinguishers use specific powder and how cutting corners leads to real safety risks. From my years working in community safety events, practical demonstrations always get the message across better than warnings buried in tiny print. Keep each MAP product where it belongs—this simple step protects both plants and people.
MAP, or Monoammonium Phosphate, shows up early in the year inside warehouses, farming stores, and sometimes on the backs of trucks rolling through small towns. This fertilizer packs a punch for crops needing a quick start, but it isn't just another bag of plant food. Over the years, a handful of hard lessons have surfaced about what happens when storage and handling get ignored. Clumping, caking, chemical reactions, and even the occasional safety scare can hit fast. Simple habits during storage and use help everyone — from the retailer watching the bottom line, to the farmer relying on MAP for strong root growth.
MAP seems harmless, but moisture brings on trouble. Anyone who's opened a forgotten bag after a rainy week will know the frustration of a solid, brick-like mass instead of free-flowing granules. Moisture also kicks off unwanted chemical changes, releasing ammonia smells or even corroding metal bins. MAP stashed under leaky roofs or on cold concrete ends up damaged and tough to use. The best storage spots look dry and closed-off from humidity. Pallets lift bags above the floor, and plastic sheeting or tarps block out rain, dew, and morning fog.
Years of working with different fertilizers show one thing — mixing them by mistake doesn't just change results in the field. Sometimes, it leaves clumps, chemical mayhem, or even a slushy mess in the bottom of a bin. Storing MAP next to urea or calcium ammonium nitrate, for example, practically invites problems if bag seals break. Marking separate spaces for each type pays off, especially when bins, scoops, and augers carry traces from earlier jobs. Dedicated tools might sound excessive, but in practice, they stop headaches when it comes time to apply fertilizer.
Dust isn't just a minor irritation when handling MAP. Breathing in phosphate dust leaves you with a scratchy throat and, after many years, some real worries about long-term health. Bags thrown around or bins emptied too quickly throw up clouds of fine particles. Simple gear—dust masks, gloves—makes a big difference, as does good ventilation. For larger-scale operations, closed handling systems or local exhaust fans keep the air clear. Regular cleaning cuts down the build-up, especially in corners or under conveyors where dust settles.
Anyone who's swept a warehouse knows spills find their way into odd places. MAP granules in walkways get tracked everywhere, making clean-up tougher every day it waits. Spilled fertilizer also attracts moisture and, eventually, mold. It's better to sweep and gather granules quickly, saving usable fertilizer and stopping a slip hazard from developing. Storage near drains or water sources adds another risk — contamination of water supplies. Blocking floor drains or storing MAP away from water keeps everyone on the safe side.
MAP doesn't qualify as a dangerous chemical by common standards, but that shouldn't invite carelessness. Over the years I've seen a few minor burns and skin rashes from folks brushing dust off their arms or wiping eyes with dirty hands. Simple washing after handling does the trick. Proper labeling helps new workers or visitors avoid mix-ups. Fire doesn't seem likely, but keeping MAP away from flammable materials and strong oxidizers sits high on my list, especially in older storage sheds with wooden beams or exposed wiring.
Good storage habits don't only save MAP from turning into a lumpy brick— they spare money, time, and avoidable cleanup. Keeping things dry, clean, separate, and protected keeps fertilizer ready for use and workers healthy. That means crops get exactly what they need, and no one has to battle a pile of wasted or clumped MAP when it's planting season.
Monoammonium phosphate (MAP) brings both nitrogen and phosphorus to the table. Farms and gardens count on it for solid yields. The real question always pops up during fertilizer season: can you just toss MAP in with everything else? Juggling fertilizers feels tempting—save a trip, save time. But not everything plays nice together. Mix the wrong combo, and you risk more than cloudy solution or a lumpy mess; nutrient lockout can hit your plants where it hurts.
Growing up on a small farm, I can recall my dad grabbing bags of whatever the co-op had on sale, lining them up, and thinking through which ones could go in the same spreader. At first glance, you’d think fertilizers just add up, but chemistry gets in the way. MAP works best with many nitrogen-based products, but it turns sour quickly with urea and lime. MAP loves moisture, so it starts drawing water out of its surroundings, which leads to clumping if mixed with fertilizers that are also hungry for water. Try blending MAP and calcium ammonium nitrate—you end up with a sticky cake that jams up machinery and won’t spread worth a darn.
Blending MAP with calcium compounds makes trouble. Calcium nitrate and dolomitic or calcitic lime just don’t mesh. I’ve watched guys toss MAP and lime together, hoping to hit pH and phosphorus at once. Instead, what you get is a reaction that binds up phosphorus as rock-hard calcium phosphate, which crops can’t access. MAP isn’t too happy with potassium chloride either. It absorbs moisture fast and will pull water from KCl, leading to more caking than in a cheap bag of sugar kept open in a humid barn.
Mixing MAP with urea seems like it should work, but moisture is the snag here too. This mix ends up sticky, meaning spreaders need a good wash after the job. Blending nitrogen with MAP in a broadcast application risks “nitrogen loss” since MAP’s slightly acidic effect can help convert urea faster, pushing more into the air as ammonia rather than helping your plants.
Some pairings work. MAP with muriate of potash (KCl) in dry, low-humidity conditions won’t aggravate caking too quickly and delivers a phosphorus-potassium punch. On big operations, both often run through air drill seeders without issue if the blend gets used up promptly. Ammonium sulfate is safe with MAP for one pass, especially if everything’s dry. I’ve run this combo on humid mornings, and the trick is to use it fast—once it sits, things stick.
Mix only what you’ll use in a pass or two. Pre-blend at the co-op just before heading out. Watch weather—cloudy or sticky mornings spell trouble for stored blends. Mechanical agitation helps with some blends, but won’t fix chemical incompatibility. If you want to hit multiple nutrients, consider split applications. Run MAP when phosphorus sits at the top of your soil needs, then come back with lime or urea at a different time. No need to chase speed if it costs your crop in the long run.
Farmers often learn the hard way—one sticky hopper, one field of yellow corn, one batch of fertilizer turned solid at the bottom of a bin. Chemistry will always have its way, no matter how clever the plan. Sticking to tried and tested blends, or keeping a close eye on weather and handling, makes the difference between a smooth run and wasted dollars.
| Names | |
| Preferred IUPAC name | Ammonium dihydrogen phosphate |
| Other names |
Phosphoric acid, monoammonium salt Ammonium dihydrogen phosphate Ammonium phosphate monobasic MAP NH4H2PO4 |
| Pronunciation | /ˌmɒn.oʊ.əˈmoʊ.ni.əm ˈfɒs.feɪt ɪnˈdʌs.tri.əl ɡreɪd ˌɛm.eɪˈpiː/ |
| Identifiers | |
| CAS Number | 7722-76-1 |
| Beilstein Reference | 1713303 |
| ChEBI | CHEBI:63006 |
| ChEMBL | CHEMBL1201735 |
| ChemSpider | 10321 |
| DrugBank | DB11310 |
| ECHA InfoCard | 03e42bfd-07c2-4fc8-a81b-c312b7b6e209 |
| EC Number | 231-764-1 |
| Gmelin Reference | 14608 |
| KEGG | C02437 |
| MeSH | D059015 |
| PubChem CID | 10654 |
| RTECS number | TB6125000 |
| UNII | 3J04Y1WV3W |
| UN number | UN 2341 |
| CompTox Dashboard (EPA) | DTXSID5023865 |
| Properties | |
| Chemical formula | NH4H2PO4 |
| Molar mass | 115.03 g/mol |
| Appearance | White crystal powder |
| Odor | Odorless |
| Density | 1.8 g/cm³ |
| Solubility in water | Solubility in water: 370 g/L (20°C) |
| log P | -2.12 |
| Acidity (pKa) | 4.7 |
| Basicity (pKb) | 11.8 |
| Magnetic susceptibility (χ) | Diamagnetic |
| Dipole moment | 5.8 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 93.3 J/(mol·K) |
| Std enthalpy of formation (ΔfH⦵298) | -1286 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | -1366 kJ/mol |
| Pharmacology | |
| ATC code | V07BB |
| Hazards | |
| Main hazards | May cause irritation to eyes, skin, and respiratory tract. |
| GHS labelling | GHS05, GHS07 |
| Pictograms | GHS07 |
| Signal word | Warning |
| Hazard statements | H315: Causes skin irritation. H319: Causes serious eye irritation. |
| Precautionary statements | Keep container tightly closed. Store in a cool, dry, and well-ventilated place. Avoid contact with eyes, skin, and clothing. Wash thoroughly after handling. Do not breathe dust. Wear appropriate personal protective equipment. |
| NFPA 704 (fire diamond) | 2-0-0 |
| Autoignition temperature | 400°C (752°F) |
| Lethal dose or concentration | Lethal dose or concentration: LD50 (oral, rat) > 2000 mg/kg |
| LD50 (median dose) | > 3,000 mg/kg (rat, oral) |
| NIOSH | SB4750000 |
| PEL (Permissible) | PEL: 15 mg/m³ (total dust), 5 mg/m³ (respirable fraction) |
| REL (Recommended) | 10 mg/m³ |
| IDLH (Immediate danger) | 1000 mg/m3 |
| Related compounds | |
| Related compounds |
Diammonium phosphate Monopotassium phosphate Ammonium sulfate Urea Ammonium nitrate |
