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When chemists first worked with diazophenol in the early 20th century, there wasn’t much talk about sensitivity or water content. Makers of explosives chased after bigger bangs with less bulk, always wanting to outdo the last invention. Dinitrodiazophenol showed up as a promising candidate. It drew attention for good reason—lightweight, fast-reacting, and energetic. But the real world doesn’t have much patience for unstable compounds. Historic explosive labs sometimes learned that the hard way. Safety depended on keeping the material damp, often with water or water mixed with ethanol. Even today, the minimum of 40% moisture means everything in handling, because dryness goes hand-in-hand with disaster. Older technical manuals didn’t beat around the bush—a little too much drying, some warmth, or a spark, and a batch could go up before anyone noticed. In the post-war period, research hammered home the point: keep dinitrodiazophenol wet or accept the risks, lives included.
Most folks outside specialty chemistry have never seen dinitrodiazophenol, and that’s no accident. Powdered forms with less than 40% water just don’t make sense for shipping or use. It shows up as a yellow or sometimes orangish paste, heavy with moisture or a blend of ethanol and water, nearly always packed tightly in sealed, moisture-proof containers. Suppliers approach every batch with respect, because past accidents cast long shadows. Whether prepping for use in detonators, primers, or specialized charges, technicians focus on the wet agglomerate: not too thick, never too dry, handled with wood or plastic, always far away from static or sparks. Seeing a dry, crystalline sample of this stuff should set off alarm bells.
In wet condition, dinitrodiazophenol doesn’t look that dangerous. Its color is almost pleasant; touch feels like gritty mud. But let that water content drop, and the danger mushrooms. Chemical treatment gives a molecule with lots of potential energy crammed into a small space—pure dinitrodiazophenol holds two nitro groups, plus that reactive diazo ring. Sensitivity to shock or flame goes way up when dry, to the point old labs insisted on special tools and triple-gloved hands. Technical bulletins mention sensitivity both to static and impact, and anyone who’s worked with energetic chemicals knows you don’t tempt fate. The water acts as a thermal and mechanical buffer; take it away, you’re gambling with a roulette wheel that’s always stacked against you.
Few suppliers will even entertain a purchase order for dinitrodiazophenol unless the buyer has specialized permits. That’s not paperwork for paperwork’s sake. Labeling tends toward the huge and obvious: warning about explosive risk, moisture percentage, and hazards in transport. Anyone with any sense checks the water content before signing for delivery. About 40% moisture is a hard line, not a suggestion, because lower water content courts disaster. Labels call out the need for cool, shaded storage and almost never mix languages when it counts. To this day, most regulatory codes force transport under UN hazard class 1.1. It doesn’t ship in bulk packages, end of story.
Old textbooks and trusted chemists say making dinitrodiazophenol is no kitchen science. Treating diazophenol precursors with nitrating mixtures under ice-cold conditions leaves no room for shortcuts. Most of the process takes place inside a fume hood, often behind blast screens. Nitration isn’t forgiving—get the temperature wrong, add too quickly, or skimp on ice and you’re sitting on an overcooked and unstable mess. Right after synthesis, the wet paste goes into slow filtration, then straight to dilution with deionized water or ethanol-water blend to guarantee nothing dries out. I’ve seen labs flinch at any sign of crusting or shrinkage of the wet cake. The call to keep the product under high moisture isn’t just tradition; doing otherwise turns these operations into a guessing game against fate.
Dinitrodiazophenol serves as both a product and a reagent for further chemical work. Those nitro and diazo functions serve as handles for chemical tinkerers wanting to modify its reactivity, usually for timing or temperature adjustments in detonating devices. Some chemists pursue structural tweaks—adding methyl or other groups—to shift sensitivities up or down, chasing the elusive mix of reliable ignition but controlled detonation. I remember a colleague saying every new derivative gets one chance to prove itself, because surprises in this line mean ruined equipment or worse. Not every tweak is worth the risk. Each modification comes with experiments for impact, friction, and electric spark sensitivity, usually conducted behind remotely operated barriers.
Chemists might call it DDNP, Diazodinitrophenol, or by systematics like 2-diazo-4,6-dinitrophenol. Some munitions makers have slang for it—sometimes “wet DDNP,” sometimes just by code numbers. Each name cues in a slightly different audience—bench chemists, safety managers, munitions experts—but all get twitchy at the idea of a dry sample. No synonym erases the risks, and the smart operators know to check the water content no matter what label gets slapped on.
There’s a long tradition in energetic chemistry of passing down stories about “what went wrong.” Most of these stories fall into the same category with dinitrodiazophenol—a careless moment, dry residual on a spatula, a loose connection in a grounding strap. If you’ve ever loaded detonator primers, you know the process is less about the chemistry and more about discipline. The best labs appoint a safety officer with the authority to shut the whole operation down if standards slip. Every movement gets double-checked: always wet transfer, use of non-metallic tools, strict grounding, and use of anti-static wear. In some cases, teams carry water sprays and dry powder extinguishers even within arm’s reach. Legal and regulatory standards grew out of past tragedies, so most labs now run rigorous checklists on water content, tools, and even air humidity in production areas. I’ve seen procedures where two workers have to read off each checklist item before opening any new batch, and for good reason.
Few modern products reach further into the specialty explosive market than wet dinitrodiazophenol. It turns up in detonator caps, blasting devices, and sometimes in composite initiator mixes for mining, seismic work, and military primers. It holds a reputation among experts for a predictable ignition, high output, and—most important—reliability if handled wet. An engineer I know complained that nothing else delivers quite the same balance between sensitivity and minimum critical mass for reliable ignition. It lands as a first-choice primer in many automatic firing systems because it braves cold weather, resists misfires, and lights off in split-seconds—all while requiring a very small starting energy, so less strain on firing circuits. Storage departments remain suspicious, though, and setup teams double-wrap the containers to keep things cool until the paste gets loaded.
Everything new in energetic chemistry meets resistance, and for good reason. Research in dinitrodiazophenol has shifted lately, with teams pushing for safer variants and trying to shift away from the classic nitrate-heavy roots. There’s hope on the horizon for less sensitive versions that keep the vital ignition qualities but shrink the day-to-day hazard. Some labs experiment with binders and plasticizers, or try encapsulation in nanostructured matrices, but nothing delivers quite the same performance without risk. I spent years watching teams break down every accident report, hoping to spot trends that could lead to a safer priming compound. Results so far look promising: lower vapor pressure means less off-gassing, and crosslinked polymers blend with the sensitive paste, but nothing stands up to the old double-checked wet DDNP for reliable field use.
Studies on dinitrodiazophenol toxicity turn up a mixed bag—acute exposure offers known risks like skin irritation, mucous membrane burning, and headaches. More worrying for regular workers are possible long-term effects tied to the nitro groups: methemoglobinemia and possible liver strain. Many older researchers developed sensitivities, confirming that even casual exposure in poorly ventilated shops was a gamble. Modern factories run strict controls, with regular blood checks for operators. Good old-fashioned PPE—respirators, chemical gloves, and instant cleanup for spills—still carry the day, especially since the stuff can linger on tools and in dust for hours. Anyone tempted to drop standards should spend five minutes with a retirement-age chemist who still remembers “the really bad days.”
More than a hundred years since its first commercial synthesis, dinitrodiazophenol with at least 40% water won’t vanish from the scene anytime soon. New regulatory pushes aim to make its storage and use safer, substituting less sensitive compounds where practical, and driving research into smart binders and encapsulation. Some day, labs may find a fully reliable drop-in replacement that skips the risks and toxicity, but so far, crews keep returning to the same wet agglomerate with gritted teeth and tight discipline. The challenge lies in balancing need for reliable, energetic initiation with daily realities of safety, logistics, and health. Maybe breakthroughs in green synthesis or nanomaterial encapsulation will loosen DDNP's grip on the field—until then, seasoned operators stick to what works, never trusting a dry sample, and always checking that moisture meter before taking the next step.
Dinitrodiazophenol shows up most often in the world of explosives and priming compounds. Folks in the industrial sector rely on its fast reactivity. Technicians use it to trigger controlled detonations, especially in applications that demand consistency, like making primers for ammunition and percussion caps. Years ago, I watched an old timer in a factory talk about safety with this compound. He always respected the wet form, knowing the dry, pure stuff wasn’t something you just toss in a truck bed.
Manufacturers work with dinitrodiazophenol containing at least 40% water, sometimes mixed with ethanol. Moisture content is not up for debate. In its dry form, dinitrodiazophenol stands among the touchiest materials you can imagine—a shock or a static electric spark can send it off. Factory workers insist on the wet version; regulations demand it. The water or water-alcohol mix reduces the likelihood of unwanted ignition, giving people a chance to handle the chemical without feeling like they’re gambling every day at work.
I’ve toured ammunition plants and blasting cap assembly lines where this safety measure saves lives. In small arms ammunition, the primer sits hidden in every cartridge. It must go off every single time, even after years in storage, but never before. Dinitrodiazophenol, in its appropriately wetted state, offers this dependability. Handling the active chemical dry would cost too much in accidents and insurance claims. By using the wetted form, workers can mix, mold, and pack primers with a much lower risk of accidental detonation.
You see this same logic in mining operations. Blasting caps, designed to set off dynamite or other secondary explosives, must get the signaling charge right. Quality control folks sample each batch for purity, but the water or water-ethanol mix is what makes mass production possible. No supervisor wants to call a family because a worker was exposed to a spark or friction hazard. The extra water content in the chemical is the difference-maker on the ground.
Handling of dinitrodiazophenol does not escape regulatory scrutiny in places like North America and Europe. The United Nations and military agencies publish lists and rules for the safe transport of energetic chemicals. Warehouse managers ensure containers leak no moisture and stay at specific temperatures. Even so, this chemical can’t leave the factory floor without paperwork and hazard labeling, warning anyone nearby not to get careless.
Environmental concerns do come up. If big spills occur, the localized water and ethanol solution prevents immediate combustion, but clean-up teams worry about runoff and contamination. Emergency responders need regular training not just for the explosive risk but for preventing this kind of chemical from reaching groundwater. In the past, lax rules led to contamination near ammunition plants; modern oversight tries to prevent repeats of those mistakes.
Factories that handle dinitrodiazophenol wet have a tough job. They must keep workers safe, meet tight production goals, and follow every rule on the books. Switching to non-explosive alternatives is an active area of research, but results haven’t matched the performance of dinitrodiazophenol for consistent primer function. Until that changes, smart safety practices and careful traceability remain the best tools. If you’ve ever snapped a cap on a toy gun or seen a demolition go off on schedule, this behind-the-scenes chemical—with its all-important water protection—helped make it possible.
Dinitrodiazophenol sounds like the kind of word that can clear a room by itself. People who work in labs or explosives manufacturing know it as a priming compound, often showing up in the world of ammunition, especially primers for firearms. This yellowish powder doesn’t come up much for most folks, but among chemists and safety managers, it’s earned real respect—sometimes mixed with just a little anxiety.
In its dry state, dinitrodiazophenol ranks high on lists of energetic and sensitive materials. It reacts sharply to friction, heat, and even static electricity, putting it in the same category as other notorious initiators like lead azide. That’s not academic—plenty of factory mishaps and lab accidents have proven it in grisly detail.
To reduce the risk of unexpected explosions, manufacturers often keep this stuff wet. This isn’t a new idea. The same approach gets used with other explosives like nitroglycerin or picric acid. Water suppresses dust and helps dissipate small shocks, making it much less likely for something to go wrong if someone drops a container or accidentally bumps a tool on a batch. At room temperature, a properly wetted dinitrodiazophenol slurry can usually resist minor bumps and jostling without blowing up.
Adding water takes the edge off dinitrodiazophenol’s explosiveness, and a hydrated mass is usually more forgiving in storage and handling. In practical terms, that means workers face less risk during production or transfer. Still, anyone assuming the hydrated form is perfectly safe misses some hard truths.
Water only adds a layer of insurance—it doesn’t turn a tiger into a housecat. If you let the material dry out, danger comes roaring back. In hot, dry warehouses, or any place with poor seals on containers, the water can slowly evaporate. The trouble creeps in so gradually that someone new to the job might not even notice. I’ve seen plenty of stories where a “hydrated” chemical sat for months, only for a careless move to trigger a tragedy.
Another point: even in its wetted condition, the material still carries risk under severe conditions. Strong impacts, sparks, or mixing mistakes during processing can sometimes overcome the safety blanket that water provides. And let’s not forget the fire risk. Water helps, but it doesn’t keep the compound from burning if it catches fire. Firefighters and hazmat teams treat even hydrated explosives as high-alert hazards for a reason.
Guarding against the worst-case scenario takes layers of control. Storing dinitrodiazophenol in reliable, sealed containers with clear labeling is as important as keeping the hydration level consistent. Training workers to recognize any sign of drying can mean the difference between a close call and a disaster. Good policies require regular checks, humidity controls, and clear lines for reporting problems.
In my experience, the strongest programs in chemical plants never treat anything as “safe enough.” Hydrated dinitrodiazophenol serves as a reminder: even with precautions, respect and vigilance matter. For anyone who thinks the hazard disappears with a splash of water, history says otherwise.
The chemistry textbooks can't do the hard work alone. Keeping dinitrodiazophenol out of the headlines means sticking to tough safety routines, staying ready for the unexpected, and keeping eyes open for ways to improve. It’s always tempting to cut corners, especially in busy industrial settings, but lives depend on that discipline. As new technologies roll out—smarter sensors for humidity, faster leak detection, and reliable remote monitoring—there’s real hope for safer workplaces, even with the most unpredictable chemicals on the shelf.
From my own experience, even the most careful planning around hazardous materials goes sideways when details get ignored. Dinitrodiazophenol, especially mixed with around 40% water or ethanol, wakes up every safety alarm in the book. Seen too many lab accidents where people assume a little moisture makes an explosive magically docile. The risks won’t just vanish because of a dilution. One overlooked spark, one sunbeam, and the worst-case scenario plays out faster than anyone can shout for a fire extinguisher.
Dinitrodiazophenol does what lots of diazocompounds do: reacts fast, decomposes explosively, and hates being provoked. Ethanol or water keeps it damp, but only to a certain extent—it dulls, not defuses. In my college lab days, someone left a similar material in a warm sunny spot "just for a day." That fridge-sized blast mark on the fume hood taught me more than anything the chemistry textbook offered.
Storing this compound involves more than slapping a DANGER sticker on a bucket. Ignoring the fire marshal’s advice or skipping quarterly stock checks tends to backfire. That’s not fearmongering, just basic respect for what this chemical can do.
Start with a proper building—not a broom closet, not a shipping container in the sun, but a real, dedicated explosives storage room. Concrete walls, spark-free electricals, and no sunlight streaming through the windows. If you’re lucky enough to have a blast-proof vault, use it. Flammable storage cabinets look appealing but not all versions block out enough heat. Don’t treat those as a guarantee unless they’ve earned their certifications with actual explosives, not just flammable paints.
Forget about stacking. Set containers spaced out, clearly labeled, and with walkways wide enough to run through if something goes wrong. Use grounded metal bins lined with inert plastic—never glass, and never containers cleaned with solvents that leave invisible residues. If ethanol is in the mix, be extra vigilant. Vapors love to sneak into electrical panels and ignite from the quietest static spark.
Temperature matters more than most assume. Always keep it under 20°C (68°F). Even a small drift above can stress a container, especially over weekends or holiday shutdowns. In my years working with hazard control, every summer saw at least one close call because an aging AC unit failed. Regular checks, logbooks, alarms wired to power failures—these low-tech tricks often outsmart the fanciest monitoring software.
One thing I’ve learned that sticks: paperwork prevents disasters. Inventory logs, checked daily, make sure nothing gets forgotten in the back corner. Only trained supervisors should touch primary storage containers. Rotation policies help too; fresh stock in, older stock used or destroyed first. No one wants to find bottles from five years back covered in mysterious crystals.
Security patrols might seem tedious, but loose doors or missing padlocks mean more than lost equipment—they set the stage for catastrophic theft or sabotage. Insurance companies care about these practicalities, and so should every manager with staff in harm’s way.
Routine storage gets most of the attention, yet nobody likes dealing with leftovers. Never pour dinitrodiazophenol down a drain or toss it with general waste. Hire certified hazardous waste contractors, follow up on their disposal receipts, and review those protocols yearly. I’ve seen disposal corners become the messiest hazard zones, because nobody “has time” to finish the paperwork.
By staying grounded, following clear protocols, and never letting an explosive material become ordinary, whole teams avoid stories that start with "if only we'd checked...". It’s not about paranoia, just common sense built on too many hard-learned lessons.
Dinitrodiazophenol grabs attention in labs and industry settings because of its explosive nature. People use it for ignition systems and in some specialized detonators. Its energy-packed structure helps accomplish plenty of important jobs, but the real story kicks in when you handle it.
Dinitrodiazophenol stands out for being sensitive to impact, heat, and friction. Someone dropping a container or scraping the material can kick off a serious reaction. Moisture changes its properties, sometimes making its sensitivity worse. Static electricity isn’t always on the mind, but in the wrong conditions, it can ruin your day.
Direct contact with the powder or crystals opens you up to burns and nasty allergic reactions. Gloves matter—no compromise here. Working in a well-ventilated room or, better yet, a fume hood keeps you clear of the strong fumes. Forgetting eye and skin protection can change an ordinary day into a trip to the emergency room.
Anyone working with dinitrodiazophenol picks up fast that there’s no place for distractions. Phones and loose jewelry create risk, both for knocking things over and for sparking the powder through static. Cleanliness matters—sweeping up stray grains right after work, washing hands, and stashing powder away from warm spots.
Dinitrodiazophenol wants its own space, far from sources of heat and open flames. Storing it with other chemicals invites trouble, especially those that oxidize. Metal or plastic containers with tight lids help block out moisture and minimize air movement, which can set off unintended reactions. Safety experts recommend grounding storage spots, so static doesn’t sneak up on anyone. Labels stay clear and visible, even in low light.
A scoop works better than pouring or shaking. Scooping reduces spillage and keeps powder in one place. Plastic tools get more use than metal ones because they’re less likely to spark. Pouring dinitrodiazophenol through metal funnels, or dragging metal across a bench, stirs up risk. Smart workers wear anti-static gear, including special clothing and shoes that let charges bleed off safely.
Only trained hands move dinitrodiazophenol around. Large batches increase the chance of a runaway reaction, so working with small portions brings more safety. Supervisors run strict checks before and after a shift. Regular training on handling rare spills or exposures keeps everyone in the loop and builds muscle memory for fast action.
A spill or an accidental ignition doesn’t wait for a plan. People working around dinitrodiazophenol should know the escape routes—no hesitation. Showers and eyewash stations near the workstation matter just as much as fire extinguishers. Firefighters need the right gear for chemical fires, not just water and foam.
Reporting close calls can save the next person trouble. No one benefits from covering up accidents. Honest communication, safety records, and regular reviews support a culture where dangerous surprises drop.
Strict guidelines and practical safety gear save both time and lives. Regular checks and shared experiences help new workers understand the risks in plain language. Investing in the right safety tools and up-to-date training builds trust among employees. Moving toward better alternatives, or automating risky steps, keeps accidents down and morale up.
Dinitrodiazophenol, in its dry form, raises concern for anyone thinking about moving hazardous materials. As a primary explosive, it doesn’t take much for things to go wrong. Carriers usually receive it mixed with water or ethanol, at least 40% by mass, to lower the risk of accidental ignition. That precaution makes a difference, but it never erases the dangers completely.
The United Nations makes it clear in their Model Regulations, which most countries—including the United States, Canada, and those in the European Union—stick pretty close to. Dinitrodiazophenol, wetted as described, falls under UN Number 0074. The law calls out anyone transporting this stuff must treat it under the rules for Class 1 explosives. No shortcuts, no room for guessing.
Drivers can’t just toss it into a truck with regular cargo. Packaging specifications land in the hands of the shipper, who has to use UN-certified containers. Those containers get tested for blast resistance and leak-proofing. Temperature swings cause trouble if not kept in check. I once talked with a hazmat trucker who said the inspector’s thermometer turned up just slightly above the threshold, and shipping had to wait until things cooled off. No one wants a mishap traced back to impatience or ignorance.
Paperwork runs deep in this business. The bill of lading, hazard class labels, emergency response numbers—it all follows each drum down the line. One error, and the shipment gets flagged. Inspectors look for gaps because those small mistakes on paper can mean overlooked risk in reality. I learned from a friend in compliance how hard it is to chase down missing or incorrect documentation—I’ve watched him sit up all night re-checking numbers and labels.
Route planning isn’t just about speed. Explosives can’t take the scenic route through busy tunnels, densely populated districts, or anywhere too close to critical infrastructure. Some states require a special permit and detailed itinerary, sometimes even an escort or police check-in at certain intervals.
Training never really ends. Drivers and handlers need to know what to do if an accident or fire does break out, and how to keep the load stable in case of mechanical failure. Drills and refreshers keep everyone alert—fatigue or boredom spells disaster, so companies put money toward keeping skills sharp. The Department of Transportation urges regular reviews, not only for legal reasons but to keep people alive.
Packaging designers have started using double-walled drums and moisture sensors, which add layers of protection. It shows that risk doesn’t disappear just because someone followed directions last year. People in the field watch for new tech, but they never stop thinking about the basics: keep it wet, label it right, store it safe, and always stay ready for the unexpected.
Some experts call for modern data tracking—smart tags and real-time sensors—to spot problems before they turn into headlines. The push for transparency and data-driven oversight could limit human error and speed up emergency response. Companies sharing best practices help raise the bar industry-wide.
Every step along the way, a culture of safety protects more than the business or a shipment. It shields neighborhoods, highways, and the people just trying to get home at the end of the day. The stakes are always personal.
| Names | |
| Preferred IUPAC name | 4-(Hydroxydiazenyl)-2,6-dinitrophenol |
| Other names |
DDNP |
| Pronunciation | /daɪˌnaɪtroʊ.daɪˈæzəˌfiːnɒl/ |
| Identifiers | |
| CAS Number | 4686-55-5 |
| Beilstein Reference | 136208 |
| ChEBI | CHEBI:53070 |
| ChEMBL | CHEMBL4304606 |
| ChemSpider | 54703 |
| DrugBank | DB11445 |
| ECHA InfoCard | 03f1ff6c-cf72-448b-8db2-4b5918ede284 |
| EC Number | 208-961-8 |
| Gmelin Reference | 52717 |
| KEGG | C18705 |
| MeSH | Dinitrophenol |
| PubChem CID | 157050 |
| RTECS number | SG9625000 |
| UNII | 53SD43A98G |
| UN number | UN0391 |
| CompTox Dashboard (EPA) | DTXSID4033524 |
| Properties | |
| Chemical formula | C6H2N4O5 |
| Molar mass | 228.11 g/mol |
| Appearance | Yellow to brown, crystalline powder or paste |
| Odor | Odorless |
| Density | 1.6 g/cm³ |
| Solubility in water | Decomposes in water |
| log P | 1.02 |
| Vapor pressure | Negligible |
| Acidity (pKa) | 0.68 |
| Basicity (pKb) | Between 6 and 7 |
| Magnetic susceptibility (χ) | -0.74e-6 cm³/mol |
| Dipole moment | 4.71 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 221.0 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | Std enthalpy of formation (ΔfH⦵298) of Dinitrodiazophenol [Containing Not Less Than 40% Water Or Mixture Of Ethanol And Water By Mass] is 9.5 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | Std enthalpy of combustion (ΔcH⦵298) of Dinitrodiazophenol [Containing Not Less Than 40% Water Or Mixture Of Ethanol And Water By Mass] is -3235 kJ/mol |
| Hazards | |
| Main hazards | Explosive; may explode by shock, friction, fire or other sources of ignition. |
| GHS labelling | GHS02, GHS07 |
| Pictograms | GHS01,GHS03,GHS06 |
| Signal word | Danger |
| Hazard statements | H201: Explosive; mass explosion hazard. H301: Toxic if swallowed. H311: Toxic in contact with skin. H331: Toxic if inhaled. H373: May cause damage to organs through prolonged or repeated exposure. |
| Precautionary statements | Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. Keep wetted. Keep only in original packaging. Store in a well-ventilated place. Keep cool. Protect from sunlight. Do not allow to dry. |
| NFPA 704 (fire diamond) | NFPA 704: 1-3-3 |
| Autoignition temperature | > 180°C (356°F) |
| Lethal dose or concentration | LD50 oral rat 220mg/kg |
| LD50 (median dose) | LD50 (median dose): 220 mg/kg (rat, oral) |
| NIOSH | DDP |
| REL (Recommended) | 0.1 mg/m³ |
| IDLH (Immediate danger) | Unknown |
| Related compounds | |
| Related compounds |
Diazodinitrophenol Nitrobenzene diazonium Lead diazodinitrophenol Diazophenol derivatives |
