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Chemistry has always mirrored society’s growth, unlocking convenience and innovation, but sometimes courting controversy. In the late nineteenth century, science moved beyond natural pigments and dived into the world of synthetic dyes, making a massive impact on textiles and biological staining. 4-Dimethylaminoazobenzene-4'-arsonic acid cropped up as part of this wave. The marriage of the azo group with arsonic acid reflected not only an appetite for richer, more versatile colorants, but also an eagerness to blend utility with emerging chemical principles. Researchers saw potential beyond color: azobenzene rings suggested new routes for biological labeling, and the arsonic acid moiety offered unique binding properties, pushing lab work in directions few had imagined. The compound’s reputation shifted over time, tracking with rising awareness about toxicology and workplace risks. Whether in the heyday of industrial dye breakthroughs or today’s high-stakes biomedical research, its story keeps echoing the broader tale of chemical progress — filled with promise and pitfalls.
I remember my first brush with synthetic dyes in a university lab, hands stained from an overzealous pour. With chemicals like 4-dimethylaminoazobenzene-4'-arsonic acid, there’s always more under the surface than striking color. The compound combines two potent motifs: the azo group (famous for vivid yellow hues) and the arsonic acid group, best known for its capacity to interact tightly with biological matter. This makes it more than a simple coloring agent; it becomes a probe, a mark of molecular specificity, and sometimes, an unexpectedly effective research tool in understanding organometallic binding in biological systems. As our knowledge deepened, those structural quirks found homes in research tools, especially in studies of protein and enzyme activity. The color grabs attention, but the real story sits in its dual role: part dye, part functional chemical handle.
Lab work rewards the observant. 4-dimethylaminoazobenzene-4'-arsonic acid takes the form of a crystalline powder, typically showing a noticeable yellow-to-orange tint. The powerful azo linkage lying at the center absorbs light near the visible spectrum, hinting at why it started life as a dye. Its moderate solubility in water makes it practical for many solution-based applications—enough to dissolve for reactions or staining, but not so soluble that it vanishes at a drop. The arsonic acid group adds acidic character, lowering the pH of solutions and participating in hydrogen bonding and metal chelation. Altogether, this combination of aromatic rings, azo bond, and arsonic acid puts a lot on the table—useful for scientists digging into binding interactions, color changes, and analytical chemistry.
Chemical labeling can sometimes seem overcautious, but after seeing friends struggle with exposure to these compounds, I appreciate the careful language found on bottles of 4-dimethylaminoazobenzene-4'-arsonic acid. Labels spell out the risks—designations for carcinogenicity, specific hazards with arsonic compounds, and detailed recommendations for handling and storage. Regulatory agencies, with good reason, ask for clear hazard symbols and proper waste protocols. Even small-quantity research use involves dedicated fume hoods, glove protection, and plans for any accidental spills. The compound’s technical sheet often gives a breakdown of minimum purity (usually 98% or above for lab-grade reagents), recommended storage temperatures to avoid decomposition, and instructions for safe disposal. I see value in these reminders—they push us to respect the material, not fear it, making sure labs stay safe and compliant.
Synthetically, 4-dimethylaminoazobenzene-4'-arsonic acid starts with the classic steps of diazotization and azo coupling—two staple reactions in an organic chemist’s toolbox. Aniline derivatives undergo diazotization, before coupling to a suitable dimethylaniline. Introduction of the arsonic acid group calls for another specialized step, sometimes involving arsenic acid derivatives under controlled conditions. Each stage brings its own risk profile. The process produces several byproducts and requires rigorous purification—usually via crystallization or chromatography—to reach standards suitable for analytical or biochemical work. Having worked through these kinds of reactions, I can attest that yields are never as high as you’d hope, and care at each step is what keeps impurities in check and helps prevent accidents involving toxic reagents or unstable intermediates.
Azo compounds always strike me as versatile—able to switch between reduced and oxidized states under the right conditions. 4-dimethylaminoazobenzene-4'-arsonic acid participates in reduction and diazo coupling reactions, and its arsonic acid group opens doors for further modifications, such as esterification or coupling to biological macromolecules. Chemists have modified it to attach fluorescent tags, to chelate metals, or to create radiolabeled variants for tracing in biological systems. The molecule’s dual nature makes it a platform for innovation, yet every modification reminds me that extra steps mean extra hazards, especially with arsenic in the mix. Each change—whether it’s an added side chain or a radioisotope—translates to a new safety challenge in both lab practice and downstream applications.
Chemistry has a naming problem. Over my years in labs, the name “4-dimethylaminoazobenzene-4'-arsonic acid” could appear as “Methyl Yellow Arsonic Acid”, “DAB-Arsonic Acid”, or arcane registry numbers. Synonyms easily trip up newcomers or those working across disciplines. Confusion leads to mistakes; plenty of chemists have ordered the wrong compound by relying on a trade name or misread registry identifier. Consistency in labeling and record-keeping makes the difference—something that both suppliers and researchers should prioritize, as even minor discrepancies can have major impacts on reproducibility or compliance with safety data.
I’ve seen the fallout of lax chemical safety procedures. Labs using 4-dimethylaminoazobenzene-4'-arsonic acid prepare strict risk assessments. The arsonic acid group presents genuine hazards: arsenic-based compounds often act as cumulative poisons, contributing to liver and kidney damage, and possible carcinogenicity. Safety standards include containment, regular air monitoring, and rigorous training for anyone handling arsonic chemicals. All steps, from weighing powders to disposing of waste, follow protocols—often double-checked by supervisors and recorded for audits. In this area, experience teaches respect quickly; shortcuts or improvisation lead to real harm.
The place of 4-dimethylaminoazobenzene-4'-arsonic acid in research might look niche on paper, but reality tells a broader story. While its early use as a textile dye faded with health regulations and evolving textile practices, it found a second life in biochemistry, analytical chemistry, and environmental science. Researchers use it to label enzymes, as a probe in enzymatic studies, and for metal chelation trials. Its ability to bind specific proteins and metals underpins niche diagnostic tests. Some studies tap into its color-changing properties as an analytical marker in spectrometry or chromatography. None of these uses can escape regulatory oversight or the constant scrutiny of safety committees, but its legacy outlasts simpler, less versatile dyes.
No discussion of this compound is honest without acknowledging how research pushes for safer replacements. Work in my own circles focuses on swapping hazardous arsonic groups for more benign analogs, keeping useful functionality while dodging toxicity. Technology unlocks new routes—structure-based design, computational chemistry, and even green chemistry protocols help avoid older, riskier steps. A wide body of published studies proposes molecules that sidestep arsenic entirely or use click chemistry for attachment to target proteins. For the time being, 4-dimethylaminoazobenzene-4'-arsonic acid holds its land in specialist labs, but its role shrinks as more sustainable and less hazardous choices move from proof-of-concept to production scale.
Early assumptions about synthetic dyes often downplayed long-term health risks. With 4-dimethylaminoazobenzene-4'-arsonic acid, animal studies and long-term laboratory exposure data exposed a suite of chronic toxicity issues, from liver cancers to neurological damage linked to arsenic exposure. These findings didn’t just lead to tighter controls—they changed how scientists conducted risk assessments for all new compounds. Modern chemical policies owe a debt to research that painstakingly cataloged side effects, setting benchmarks for permissible exposure levels, mandatory protective equipment, and workplace exposure monitoring. Today, many labs run routine health checks for staff working with arsonic compounds, a step I hope gets wider adoption in lower-resource settings where regulations don’t yet match need.
Looking ahead, 4-dimethylaminoazobenzene-4'-arsonic acid faces an uncertain path. On one side, niche applications in advanced research and biochemical probing have not found perfect substitutes—yet near misses and ongoing health concerns challenge its staying power. Improved detection methods, safer analogs, and regulatory pressure leave this compound on borrowed time for anything beyond highly controlled laboratories. The lesson: chemistry moves forward by balancing past knowledge and future impacts. Substitution, thoughtful design, and honest risk–benefit calculations push the field beyond nostalgia for chemical classics and toward responsible exploration. Each breakthrough urges us to revisit what we use, how we use it, and why—so we build a chemical toolkit fit for modern science and safe living.
Many people hear “4-Dimethylaminoazobenzene-4'-arsonic acid,” and their eyes glaze over. The name makes it sound like something only a chemist could love. It comes up from time to time in conversations about food dyes and animal feeds, which might surprise anyone who hasn’t spent years in a lab or on a farm. This chemical matters more to history than to today’s daily life, but understanding it helps explain why we keep pushing for better safety in what we eat and how we raise animals.
Long ago, people started using artificial dyes to brighten food and make animal feed look appealing. This chemical — often called DAB or butter yellow — brought vivid color without the high cost of natural ingredients. It’s tough to beat the glowing yellow of butter substitutes or the bright pellets in livestock feed, especially back when fresh-looking food drew buyers. I remember my grandmother always reached for the brightest-looking margarine at the store, thinking it must be more “real” than the pale blocks left behind.
Scientists and regulators dug into DAB’s safety in the early 20th century. After a few decades, data piled up showing it could cause harm — especially cancer in lab animals. Old research from the 1930s and 40s shows clear links between this compound and liver cancer in rodents. These studies weren’t perfect, but people loved colorful food back then, so DAB kept turning up in places it shouldn’t.
Livestock producers wanted quick, cheap ways to make feed look appealing. Farms hoping to catch a better price used brightly colored meal as a marketing trick – a bag with a golden hue gave the impression of quality. DAB played a part in this story. People didn’t talk much about the risks. The focus stayed on profits and appearance, not animal health or consumer safety. Eventually, regulators started listening to researchers instead of advertisers. Countries like the US, UK, and members of the EU banned DAB in food and feed decades ago, once the cancer risks got too big to ignore. Now, the only place you see it mentioned is old scientific journals or poison control handbooks.
The story of DAB reminds me that shortcuts in the food chain have consequences. One generation’s miracle chemical often ends up as the next’s cautionary tale. Today, most countries enforce strict safety checks before approving additives. For someone with a family history of health troubles, it’s reassuring yet sobering. Mistakes of the past shouldn’t repeat themselves, but only if vigilance stays high.
Clean labeling movements gained steam for a reason. People push back against substances with names you need a chemistry degree to pronounce. Farmers and food makers look for coloring agents from carrots, beets, even turmeric. Yes, the colors fade faster, but the risk of harm drops. Testing, transparency, and fierce debate drive these changes more than company slogans or clever marketing.
The story of 4-Dimethylaminoazobenzene-4'-arsonic acid serves as a reminder: food safety depends on constant oversight, clear science, and public pressure. Skipping steps to make products look better or cost less just isn’t worth it in the long run.
4-Dimethylaminoazobenzene-4'-arsonic acid carries a name that trips up almost anyone outside a chemistry lab. This coloring compound, sometimes called DAB, grabbed a seat in research history because of its early ties to cancer studies and industrial dye production. The bright yellow-orange tint used to look innocent but demands close attention because its chemical cousins set off health alarms in the past.
Researchers flagged its risks by watching what happened to lab animals after exposure. Rats fed dimethylaminoazobenzene (a related chemical) developed liver cancer, which hit hard for scientists searching for the roots of carcinogenesis. The arsonic acid group, with its arsenic backbone, adds another layer of caution. Chronic arsenic exposure, even in tiny amounts, leads to skin lesions, cancer, cardiovascular disease, and affected neurological development in children.
I remember going through lab safety briefings where the instructor never glossed over azo dyes with arsonic acids. Dropping a small spatula of the compound triggered a drill on glove changes, fume hoods, spill kits, and record logs since skin contact alone raised the odds for long-term health trouble. Old safety data sheets told stories about possible skin and respiratory irritation, but newer studies lean much heavier on toxicity. Just working in a room with loose powder in the air requires an N95 mask or better filtration.
It isn’t just human safety that’s at stake. Rinsing runoff from dye production into streams leads to polluted water, which bioaccumulates as arsenic in fish, wild birds, and livestock. DAB’s breakdown releases other nitro compounds that harm insects and smaller aquatic life, killing off helpful stuff in the soil and water. These environmental effects echo classic stories like the Minamata disaster or arsenic poisoning in Bangladesh’s groundwater.
Strict lab control makes the difference. Storing DAB away from workspaces, logging every milligram used, and disposing of leftover chemicals as hazardous waste cuts most of the risk before it even touches a wider audience. Substituting other dyes or indicators that don’t have the arsonic acid unit takes away the heavy burden of arsenic exposure entirely. Encouraging research into green chemistry solutions—dyes and reagents from plant materials, for example—breaks the cycle of dangerous byproducts.
Switching procedures, especially in older industries, often meets resistance because of habit, cost, and supply contracts. Cost now factors in environmental cleanup, regulatory fines, and long-term health settlements, which easily eclipse the price of safer alternatives. Reeducation and strict enforcement by agencies like OSHA and the EPA push companies toward better chemical policies. Modern university training embeds green chemistry so the next crop of scientists doesn’t fall back on dangerous legacy reagents by default.
Hazards don’t wait for dramatic accidents—they pile up through routine use, trace spills, and silent contamination. Every step toward tightly managed chemical use, cleaner alternatives, and community education shrinks risk for both people and the planet. From what the record shows, treating 4-dimethylaminoazobenzene-4'-arsonic acid with respect isn’t an overreaction but a necessity grounded in what science and lived experience already proved.
4-Dimethylaminoazobenzene-4'-Arsonic Acid doesn’t show up in everyday life; it appears in specialized labs and select manufacturing. For anyone who works around this compound, the way it sits on a shelf can make the difference between safety and a bad situation.
Ask anyone who’s spent time in a research lab—handling chemicals separates a well-run operation from trouble. This substance carries some real baggage. Classified as a hazardous chemical, with possible toxic and carcinogenic effects, the rules about storage are more than red tape. The CDC and OSHA both keep a close eye on how things like this get stored. In my own days as a student assistant in a university chemistry storeroom, even small lapses would get serious pushback from supervisors. The protocols existed for a reason: accidents hurt people who make simple mistakes.
For this kind of compound, a cool, dry spot out of sunlight remains essential. Heat speeds up decomposition, opening the door to dangerous byproducts or a runaway reaction. Companies often recommend between 2°C and 8°C, inside dedicated chemical refrigerators—never a spot where food gets kept.
Keeping the bottle sealed tight fights off moisture from the air. Water spells trouble because it can degrade the acid, create unwanted reactions, or cause clumping that messes with measurements. In real facilities, desiccators pair with solid, screw-top containers to fight humidity. I used to check silica gel packs every week to make sure nothing was going wet.
I once saw a bottle, mislabeled and placed next to acids it shouldn’t have been near, send an entire floor into evacuation. Precise labeling seems tedious—it isn’t. Every hazardous container, especially those with tricky names like 4-Dimethylaminoazobenzene-4'-Arsonic Acid, deserves a clear, chemical-resistant label.
Storing chemicals together encourages cross-reaction risks. This one stays away from strong oxidizers, acids, and bases because those mixtures turn volatile or lead to hazardous gas production. Just last year, a report from the American Chemical Society tallied over 90 lab accidents tied to sloppy segregation.
Direct skin, eye, or inhalation exposure to this compound carries real health risks. Facilities store it in locations with limited access, often locked away from general lab traffic. This step limits curious passersby or under-trained workers from bumping into trouble they didn’t expect.
Strict documentation helps meet local and federal rules. Digital logs track batch numbers, expiry dates, and storage conditions. Regular audits happen, prompted by OSHA standards, so everything stays above board. Any chemical handler who’s faced an audit knows how important accuracy and honesty are for both safety and continued operation.
Practical solutions reach beyond rulebooks. Double-containment, alarmed entry doors, and up-to-date Safety Data Sheets posted where the work goes on all reduce risks. Training hands-on with mock situations, not just reading manuals, gives staff a much clearer mind when real incidents threaten. Groups that foster a strong safety culture never regret the investment. Proper storage conditions don’t just protect workers—they protect everyone who might come near.
4-Dimethylaminoazobenzene-4'-Arsonic Acid isn’t a household name. Still, research labs, chemical plants, and sometimes university classrooms pull out bottles labeled with it. This compound’s long chemical structure comes with both complexity and risk. It has ties to arsenic and aromatic amines—ingredients known for hazardous side effects if someone isn't careful. I remember my earliest days in a chemistry teaching lab, students thinking gloves and goggles were overkill until a glass bottle broke or a drop hit a bench. Those moments change your mindset pretty fast.
Safety protocols pop up for a reason, and history teaches these lessons the hard way. Arsenic compounds can cause skin irritation, liver problems, and even cancer after prolonged exposure. Aromatic amines aren’t much kinder—plenty of scientific evidence documents their link to toxicity and carcinogenicity. Peer-reviewed studies from institutions like the National Institute for Occupational Safety and Health (NIOSH) stress that chronic, even low-level, contact can spark health crises decades later.
I’ve watched senior chemists, ones who let complacency creep in, pay for minor slips. A single drop on the skin or a whiff at the bench sometimes unravels years of good health. The real lesson? Don’t lean on luck—assume any exposure is too much.
Every time I enter a research lab with hazardous chemicals, I do a lot more than put on a pair of gloves. A snug lab coat, splash-proof goggles, and—most crucial—work inside a fume hood keep accidents from turning into medical stories. The fume hood pulls away vapors and dust, stopping those invisible risks from floating around the workspace. Always trade cotton gloves for nitrile or neoprene, since arsonic acids slip right through common fabrics.
When spills happen, and they do, following spill protocols keeps everyone safe. It starts with alerting folks nearby, then hopping into action with the right neutralizing agents and absorbent pads. Throw out contaminated gloves and paper towels in hazardous waste bins—don’t let them blend into regular trash. Regular cleaning of the workspace and frequent hand washing brings peace of mind.
Years in the field teach you never to trust a mystery bottle buried on a bottom shelf. 4-Dimethylaminoazobenzene-4'-Arsonic Acid belongs in a tight-sealed, clearly labeled container away from acids, bases, or light-sensitive materials. Store it in a chemical-resistant cabinet marked for toxic or carcinogenic substances—never in a high-traffic or food storage area. Double-check inventory logs and expiration dates so you don’t wind up working with a compromised or decomposing batch.
Every work site benefits from regular safety training—refresher courses, drills, and updates help the details stick. I always encourage coworkers to speak up if a protocol seems off. A healthy workplace invites questions and suggestions from every level of the staff. If something feels off—if the fume hood doesn’t work, if gloves look thin—say something before a mistake happens. Lab safety isn’t just paperwork; it’s a lived habit.
Protecting health and meeting regulatory guidelines pays off over the long run. This doesn’t just keep people safe; it also protects careers and reputations. Safety habits with dangerous chemicals belong at the top of everyone’s to-do list.
Science has a way of making complicated things simple if you dig beneath the jargon. The compound in focus, 4-Dimethylaminoazobenzene-4'-arsonic acid, is more than a mouthful — it stands as a classic example in organic and inorganic chemistry, especially for those who spend hours figuring out what the letters and numbers in a chemical’s name mean. To break it down, the molecule’s common formula is C14H17AsN4O2. The numbers come from the arrangement and connection of its atoms: carbon, hydrogen, nitrogen, arsenic, and oxygen. It combines an azo group (a chain of nitrogen atoms connecting two aromatic rings), a dimethylamino group, and an arsonic acid group.
People in the lab remember these details because every group adds its own story. The azo group, sporting that bright color, made this class of compounds useful in dye chemistry. The arsonic acid bit gives it a heavy presence, throwing arsenic into the mix, which is rare in today’s synthetic world, except for very specific research needs. C14 tells us the skeleton holds fourteen carbon atoms, organizing the molecule’s framework. Pair these with seventeen hydrogens, four nitrogens, an oxygen duo, and that single but attention-grabbing arsenic atom.
Molecular weight is not just a number scientists scribble in lab books. In practice, it helps with everything from preparing solutions to calculating doses in toxicology studies. The molecular weight of 4-Dimethylaminoazobenzene-4'-arsonic acid stands at about 332.23 grams per mole. That value comes from adding up the weighted contributions of each atom type: carbon (12.01 g/mol), hydrogen (1.01 g/mol), nitrogen (14.01 g/mol), arsenic (74.92 g/mol), and oxygen (16.00 g/mol). Even a slight miscalculation messes up a reaction or risk assessment — as any lab worker who rushed a prep knows too well.
In my time working in student laboratories, molecular weight calculations led to the most chewing on pencils. Accuracy means more than getting a number right for a quiz: it avoids ruining experiments and keeps work safe, especially when arsenic enters the picture. With proper knowledge of the compound’s formula and weight, chemists manage risks better. In the past, dyes and research tools included these molecules before anyone worried about chronic toxicity. It’s no coincidence that today, researchers keep a close eye on arsenic derivatives, measuring everything down to the last decimal.
Understanding chemistry’s fine print makes a tangible difference. The details behind one compound’s structure and size echo outward. If you run a lab, purchase standards, or work with chemical databases, formula and molecular weight matter at every step. These details influence how a compound gets handled, shipped, and labeled. Appropriate safety measures get put in place only if details are right — nobody wants to find out late that a brightly colored powder is an arsenic-laden substance that shouldn’t be in reach without gloves, masks, and a working fume hood.
There’s the issue of responsible sourcing, too. Some places ban or restrict import and use of arsenic compounds. Companies and researchers need identifiers like molecular formula and weight to prove what’s inside the bottle and meet legal standards. Accuracy on these points protects both the people using them and the communities where products travel.
Making chemistry safer and smarter depends on a culture of accuracy. Open access to correct molecular information lowers risks and enables advances in fields like toxicology, environmental monitoring, and analytical chemistry. Doing the work to learn what those formulas and weights actually mean, and double-checking them, pays off for everyone — from students first encountering an intimidating compound to seasoned professionals charting regulations and safe practices. Every detail counts in the world of molecules.
| Names | |
| Preferred IUPAC name | 4-[(4-Dimethylaminophenyl)diazenyl]benzenearsonic acid |
| Other names |
Methyl Yellow AA Butter Yellow AA DABAA 4-[(4-Dimethylamino)phenylazo]benzenearsonic acid |
| Pronunciation | /ˌdaɪˌmɛθɪl.əˌmiː.noʊˌæz.oʊˈbɛn.ziːn ˈɑːr.sɒn.ɪk ˈæs.ɪd/ |
| Identifiers | |
| CAS Number | 2819-74-3 |
| 3D model (JSmol) | Here is the **JSmol 3D model string** for **4-Dimethylaminoazobenzene-4'-arsonic acid**: ``` CCN(C)C1=CC=C(C=C1)N=NC2=CC=C(C=C2)As(=O)(O)O ``` This is the **SMILES string** representing the structure, which can be used in JSmol to generate the 3D model. |
| Beilstein Reference | 1718732 |
| ChEBI | CHEBI:83615 |
| ChEMBL | CHEMBL23485 |
| ChemSpider | 65642 |
| DrugBank | DB14055 |
| ECHA InfoCard | ECHA InfoCard: 100.007.693 |
| EC Number | 4.1.3.8 |
| Gmelin Reference | 84178 |
| KEGG | C19057 |
| MeSH | D004062 |
| PubChem CID | 11703 |
| RTECS number | BW5600000 |
| UNII | Q9FY2GSM2H |
| UN number | UN3465 |
| CompTox Dashboard (EPA) | DTXSID6022812 |
| Properties | |
| Chemical formula | C14H17N4O3As |
| Molar mass | 337.23 g/mol |
| Appearance | yellow solid |
| Odor | Odorless |
| Density | 1.17 g/cm³ |
| Solubility in water | Slightly soluble |
| log P | -0.22 |
| Vapor pressure | 1.16E-21 mmHg at 25°C |
| Acidity (pKa) | 2.25 |
| Basicity (pKb) | 7.49 |
| Magnetic susceptibility (χ) | -0.00002 |
| Refractive index (nD) | 1.613 |
| Dipole moment | 8.27 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 251.2 J mol⁻¹ K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | -63.5 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | -3387 kJ/mol |
| Pharmacology | |
| ATC code | A16AX05 |
| Hazards | |
| Main hazards | Carcinogenic, toxic if swallowed, suspected of causing genetic defects, may cause damage to organs |
| GHS labelling | GHS02, GHS06, GHS08 |
| Pictograms | GHS06 |
| Signal word | Danger |
| Hazard statements | H302: Harmful if swallowed. H350: May cause cancer. |
| Precautionary statements | P261, P280, P301+P312, P304+P340, P305+P351+P338, P308+P313 |
| NFPA 704 (fire diamond) | 2-2-2-Yes |
| Lethal dose or concentration | LD50 (oral, rat): 495 mg/kg |
| LD50 (median dose) | LD50 (median dose): 280 mg/kg (oral, rat) |
| NIOSH | RN105-55-5 |
| PEL (Permissible) | PEL (Permissible Exposure Limit) for 4-Dimethylaminoazobenzene-4'-Arsonic Acid: Not established |
| REL (Recommended) | 0.01 mg/m3 |
| Related compounds | |
| Related compounds |
p-Aminodimethylaniline p-Dimethylaminobenzaldehyde Methyl Orange Sulfanilic acid Azobenzene |
