Chemistry’s big leaps often begin in academic labs, with researchers obsessed over a tricky synthetic route. The molecule known as Disodium 5-[5-[4-(5-Chloro-2,6-Difluoropyrimidin-4-Ylamino)Benzamido]-2-Sulfonatophenylazo]-1-Ethyl-6-Hydroxy-4-Methyl-2-Oxo-3-Pyridylmethylsulfonate traces its history back to the late twentieth century, a period marked by growing demand for new dye components and innovative bioactive compounds. Back then, clever organic chemists started tinkering with functional groups, using sulfonation and pyridylmethylsulfonate scaffolds to generate molecules with tunable properties. The years that followed brought better methods for azo-coupling and halogenated pyrimidine insertion, shaping this compound's current form. Patents and journal articles tell the story of slow but steady improvements, especially as industries looked for molecules that could push performance while meeting tighter regulatory limits.
This isn’t some everyday chemical sitting forgotten on a warehouse shelf. It stands out for its bright color, stability, and the way its chemical backbone invites so many uses. Labs first took notice because of the strong azo bond—well-known in the dye world for producing vibrant pigments. But things changed when pharmaceutical groups found that modified analogs displayed useful bioactivity. That kicked off a race to tweak the molecule for better water solubility and more predictable interaction with biological targets. Today, it shows up in dye, diagnostics, and sometimes in specialty coatings that need reliable performance under tough conditions. The product draws attention wherever high-grade, carefully engineered molecules carve a niche.
Look at this molecule up close and you’ll spot several telling features. The color, a brilliant red-orange, comes from its azo linkage, stretching absorbance into the visible region. In water, it dissolves quickly, the sodium salt form making it much easier to handle than its free acid cousins. Chemically, the structure stays stable under neutral and slightly acidic conditions, but alkaline washes will start to break down the azo bond. Its high molecular weight and the presence of both hydrophilic and hydrophobic domains shape solubility and reactivity. Thermal stability reaches up to about 160°C before significant decomposition. The dual presence of halogens and sulfonic acid groups adds further complexity, with each group playing a distinct role—halogens tweak electron density, sulfonates drive solubility.
Anyone serious about handling this product expects a clear technical data sheet. Labs specify minimum purity thresholds, typically above 98%, verified by HPLC or NMR. The sodium content and residual organic solvents receive special scrutiny. Moisture, often the enemy of shelf-life, must stay below a half percent, checked through Karl Fischer titration. Each drum or bottle carries a unique identifier, shipment batch, and best-before date. Labels lay out full chemical names, signal words, pictograms, handling requirements, and emergency contacts, all driven by regulatory mandates like REACH and GHS. Proper identification doesn’t just keep regulators happy—it gives users confidence that the material inside matches published data.
This compound takes effort to synthesize. Most syntheses begin with a stepwise strategy: start by preparing the difluoropyrimidine amine component, typically through selective halogenation, then couple to an appropriately activated benzoic acid. The sulfonation comes next, usually on the phenyl ring, followed by azo-coupling with the substituted pyridyl component. At each step, chemists look for clean conversion, monitoring by TLC, LC-MS, or even in-process NMR. Intermediate purification—crystallization, liquid-liquid extraction, or preparative chromatography—removes by-products before the final sodium salt forms out in aqueous base. Each reagent’s quality, solvent grade, and reaction temperature need careful control. Yields above 70% are possible, but even a skilled team faces lost product if moisture sneaks in or a pH shift derails a coupling step.
Azo and pyridyl linkages open the door to versatile chemical transformations. Azoreduction, using mild reducing agents, splits the molecule into separate amine and pyridyl fragments—handy for downstream modifications. Halogen substituents allow for Suzuki or Buchwald cross-coupling, giving chemists a grab-and-go anchor for library synthesis. The sulfonate group welcomes converses like ion-exchange or conversion into amide bonds, suiting biomedical uses. In industry, certain modifications enable polymer attachment or surface grafting, shifting the compound’s role from standard dye toward sensor component or diagnostic label. Each new modification brings the risk of losing color fastness or lowering water solubility, so every change gets tested for real-world performance.
This compound’s IUPAC mouthful rarely makes it into casual conversation. Laboratories often assign shorthand like “Disodium Pyridyl-Sulfonate Azo Dye” or catalog codings from major chemical suppliers. Some firms patent brand names for specialized work in diagnostics or as marker molecules in complex assays. Trade names focus on application: you might spot it listed as a food dye under E numbers, or popped into proprietary lab kits under names ending in "-Red" or “Sulfo-Dye 347”. Across the literature, sticking to the core identifier helps in database searches and safety checks, preventing mix-ups in regulatory filings or hazardous materials transport.
Working with halogenated azo-sulfonate demands a safety culture, not just paperwork formality. Inhalation risks fall low, but powdered forms can irritate eyes and mucous membranes. Spills need prompt cleaning to prevent stains and accidental exposure. Disposal runs into tighter scrutiny: regulators watch for the by-products of incomplete incineration or reduction. Production lines must follow strict containment practices, with engineering controls, personal protective equipment, and continuous air monitoring. Storage calls for dry, sealed containers, away from oxidizers or reducing agents. Any facility that mishandles the product risks more than regulatory fines—they could miss out on market access or lose the trust of customers who demand assurance of operational integrity.
Dyes and pigments built from this scaffold color everything from textiles and paper to food packaging, standing up to sunlight and repeated washing. In diagnostics, it serves as a chromogenic label, reacting in immunoassays, ELISAs, and other rapid tests where eye-catching color change speeds up decision making. Low-level biomedical research uses derivatives as molecular probes, tracking tough-to-spot proteins or nucleic acids. In coatings and plastics, the durability outperforms simpler, less stable alternatives, helping manufacturers meet customer demands for fade resistance and mild chemical exposure. Some agricultural researchers scout ways to embed these compounds in seed treatments where stress-indicating color might give a heads-up on plant condition. With each new use, technical staff run careful validation to avoid unwanted cross-reactivity or regulatory headaches.
R&D teams in pharma and chemistry departments push this molecule into new territory. Structure-activity studies explore modifications to the pyrimidine ring, aiming for tighter biological target binding. Analytical chemists spin off new detection kits, linking the color change to enzyme action in seconds. Environmental scientists weigh in on the breakdown products, publishing findings that shape the next round of regulatory standards and give formulation chemists feedback loops for redesign. Computer-aided design overlays real-world data, letting chemists move from guesswork to rational design. Collaboration between universities and industry sometimes yields patent battles, but more often it opens new supply chains or inspires second-generation analogs with less toxicity and stronger performance.
Nobody working in chemical safety ignores the legacy of azo dyes and surfactants. Early optimism about application range sometimes led to overuse, only reined in after toxicologists showed up with data on bioaccumulation, organ toxicity, or allergic response. For this compound, safety testing covers more ground than a simple Ames test for mutagenicity. Animal models examine acute and chronic exposure, looking at blood chemistry, organ function, and any neuropathic effects. In vitro metabolism studies measure breakdown in simulated digestive or aquatic environments, flagging any products that might cause long-range ecological harm. Manufacturers now share new toxicity data not just with regulators but directly with customers, driven by consumer demand for transparency and tighter sustainability gates.
Market and research pull shape the road ahead for engineered molecules like this. Regulatory pressure nudges firms to lower impurity profiles, cut down persistent by-products, or shift toward biodegradable analogs. At the same time, demand rises for bright, long-lasting pigments in new fields like OLED displays or smart textiles. In diagnostics, the molecule continues as a backbone for faster, multiplexed assay kits that work on a single drop of blood. Synthetic chemists look for greener routes—solvent-free methods, enzyme mediation, or controlled crystallization. For those of us watching from the bench or industry floor, the compound serves as a proof that small changes—better synthesis, tighter specs, sharper safety checks—add up to keep even “old” molecules at the center of innovation.
Most people won’t recognize Disodium 5-[5-[4-(5-Chloro-2,6-Difluoropyrimidin-4-Ylamino)Benzamido]-2-Sulfonatophenylazo]-1-Ethyl-6-Hydroxy-4-Methyl-2-Oxo-3-Pyridylmethylsulfonate by name, but plenty of us have seen its vibrant color pop in household products and textiles. This tongue-twister belongs to a group called azo dyes, which chemists rely on for their bold, lasting colors and water solubility. Dye companies count on these compounds to make sure colors don’t fade after a few washes. It always struck me how much effort goes into something most folks hardly notice—the blue shirt in a store window or the red streak in their shampoo.
Manufacturers pick dyes like this because stability counts in products that see regular use. In industrial settings, workers rely on chemicals with predictable behavior. This makes life easier for clothing brands, paper producers, and even the people filling bottles in cleaning factories. Textile plants want the same shade every time a batch rolls through the machines. Personal care companies need color to stay true across years of shelf life. Removing this dye from the system turns into a headache for any business that values consistency—something that keeps factories running smoothly and customers coming back.
The conversation around synthetic dyes always comes with questions. Azo compounds, including this one, have seen their share of scrutiny. Regulatory groups like the FDA set limits and testing standards. The fact that these substances face strict checks means most uses are safe for consumers under current practices. In my own work with product safety, I’ve learned how a single dye can spark a months-long review, complete with lab tests and thick safety documents. There’s always pushback from consumers who want fewer chemicals in their purchases—nobody wants a potential irritant near their skin or mouth.
Some companies look for natural sources, but switching from synthetic dyes brings new issues. Plant or mineral-based colors can fade faster or react unpredictably with certain soap formulas or textiles. These options often cost more and need more raw material, which also impacts sustainability. Education helps: being upfront about why companies use certain ingredients builds trust. If customers understand safety protocols and see companies investing in non-toxic alternatives, they’ll likely stick with those brands.
Sewage plants and waterways get hit hardest by the run-off from dyes. Years ago, I joined a team looking at local river water in an industrial town—traces of dyes colored everything. Problems like this push the industry to search for better water treatment solutions, like improved filtration and using less toxic substances. Public demand for greener practices also pushes companies. Businesses adopting newer, safer dyes or investing in cleaner disposal protect the environment and win public favor. This shift isn’t easy, but it moves everyone closer to a cleaner, safer world.
So much of chemical manufacturing quietly shapes the products we trust daily. By focusing on smarter ingredients and open communication, companies help people feel secure—both about what they’re using and what they’re washing down the drain.
With chemical names like Disodium 5-[5-[4-(5-Chloro-2,6-Difluoropyrimidin-4-Ylamino)Benzamido]-2-Sulfonatophenylazo]-1-Ethyl-6-Hydroxy-4-Methyl-2-Oxo-3-Pyridylmethylsulfonate, most people usually just see a mouthful. For folks who don’t spend their days reading up on food additives or pharmaceutical excipients, such chemicals tend to blend into the background of everyday life. Still, questions come up: is this stuff safe? Does it matter if it shows up in food, medicine, or even as a dye in fabrics?
Finding unfamiliar names on ingredient lists used to push me toward simple grocery options — you grow up avoiding mysteries you can’t pronounce. In college, a basic toxicology course and a trip through regulatory agency documents taught me that complexity doesn’t always mean danger, but it sure does demand caution.
This compound crops up mostly in specialized applications. Its structure, packed with aromatic rings and a few halogens, hints at a synthetic dye or certain types of targeted pharmaceuticals. The story proves bigger than one long name: it reveals how tangled modern chemistry gets with health and safety.
Regulatory watchdogs like the FDA, EFSA, and Japan’s FSSAI run tight ships when letting chemicals near the human body. They review studies on acute and chronic toxicity, how the substance breaks down in the body, and its potential to cause allergic reactions or cancer. For most new additives or excipients, labs chart effects through animal models before anything gets close to a human trial.
Public records show little open human safety data for this exact compound outside highly technical journals. Results depend on use. For colorants, purity and breakdown products matter — impurities or decomposition products sometimes do more harm than the main compound. In pharmaceuticals, unexpected side effects can force a recall after approval. This is why vigilance goes hand in hand with innovation.
Some synthetic dyes and sulfonate-based chemicals present allergy or intolerance risks. Long chemical tails sometimes resist breaking down, leading to build-up in the environment or in body tissue. Halogens, such as chlorine and fluorine in the structure here, make chemists look twice because related compounds might produce toxic metabolites.
History offers plenty of cautionary tales. Substances like tartrazine or certain azo dyes, once seen as harmless, later showed links to hyperactivity in children or rare allergic reactions. Others turned out fine, but no outsider can tell the difference by the name alone.
Getting the green light for any new ingredient takes years of testing. Trust grows only with real evidence: studies reviewed by independent experts, updates based on new findings, and open lines for consumers to report side effects. Labels mean something, but open databases where people can look up plain-language safety data count as a step in the right direction.
If a doctor or public health group starts warning about a chemical, that’s worth paying attention to. No ingredient is risk-free across all uses, and what counts as “safe” shifts with updates and better science. The smart route: check ingredients, read what trusted regulatory sources say, and push for better transparency so that every person has a fair shot at understanding what lands on their plate or in their medicine.
Few people recognize this tongue-twisting chemical by name, yet it pops up in many industries thanks to its coloring and binding properties. Many sources group it with synthetic dyes used in food, textiles, and even some pharmaceuticals. Seeing a name like this on an ingredient label may stir curiosity, or even worry. My own curiosity over years of work in food safety led me to dig deep into what we actually know about it—especially the reaction some people might have after exposure.
Common symptoms usually start with mild stomach complaints—think nausea, stomachache, or diarrhea. I remember someone contacting my old workplace after their child felt nauseated from a drink colored with an azo dye in the same chemical family. Many children, particularly those prone to stomach sensitivity or allergies, react faster and more obviously than adults. Skin rashes and itching sometimes show up in people with known dye allergies, and asthma-like symptoms might appear in those with a history of breathing problems. Most of the time, reactions show up pretty quickly after exposure and clear up in a day or two.
Anyone with an already overactive immune system—think allergies, eczema, or asthma—should be extra careful. Doctors report that synthetic dyes in this class can set off hives or even anaphylactic shock in those with severe allergies. Young children, especially kids diagnosed with ADHD, may react with hyperactivity or problems focusing after eating or drinking products containing this type of synthetic dye, according to various studies flagged by pediatricians worldwide. This has fueled ongoing debates about safer alternatives and stricter food labeling laws.
Studies in animals give us a bigger-picture warning. Scientists link certain azo compounds to possible cell changes and DNA problems after long-term use. The European Food Safety Authority reviewed a handful of similar synthetic coloring agents and flagged concerns about cancer risk in lab rats exposed to large amounts over their lives. No one has drawn a direct line to cancer in people just yet, but there’s enough on the table for many regulators to recommend using as little as possible in food and consumer goods.
Manufacturers in Europe and several parts of Asia already use less of this compound, swapping it for natural colors made from beets, carrots, or turmeric. Scrutiny in the United States is growing, but the rules haven't caught up everywhere. As a shopper, I started reading labels and choosing more foods and household goods with shorter, recognizable ingredient lists. For parents, keeping an eye out for any reactions in kids after eating vividly colored snacks makes a difference. Health workers urge doctors and nurses to ask about colored foods or supplements when evaluating mysterious rashes or stomach troubles.
Safer choices often mean choosing the simplest options. Food makers and regulators could work together to add clear warnings or push forward on replacing synthetic dyes with less reactive, plant-based ones. People living with allergies or asthma can talk with their healthcare providers about what to watch for and keep records of any bad reactions. None of these steps need complicated tech or big budgets. They just rely on paying attention, learning from experience, and valuing health over bright colors or fancy packaging.
Walking into any well-run laboratory or chemical warehouse, clear organization and strict protocols hit you right away. It might sound like overkill, but a careful approach pays off. Disodium 5-[5-[4-(5-Chloro-2,6-Difluoropyrimidin-4-Ylamino)Benzamido]-2-Sulfonatophenylazo]-1-Ethyl-6-Hydroxy-4-Methyl-2-Oxo-3-Pyridylmethylsulfonate, as long as that name is, deserves that attention to detail. Not every chemical brings the same set of challenges. This compound, like many complex organics and dyes, can react to moisture, light, and air exposure. It can lose potency. Sometimes it even changes color or produces unwanted byproducts if left in the wrong conditions.
I’ve stood in basements where forgotten containers grew lumps and fused to shelves. Controlling temperature makes all the difference. Keep this compound in a cool, dry space, well under 25°C. Humidity puts chemical stability at risk, so silica gel packs and sealed containers save lots of time, money, and headaches. Mold rarely warns you before it invades, so a dehumidifier or climate control system brings relief you won’t regret.
Certainty doesn't come from guesswork. In my experience, staff sometimes skip labeling or forget to screw lids back on. This turns a reliable product into an uncertain risk. Dark, airtight bottles and secondary containment give you peace of mind that light and atmospheric oxygen won’t start slow damage that compounds over weeks.
Storing chemicals close to acids, aldehydes, or oxidizers adds unnecessary variables. I've seen dyes wrecked this way, their color thrown off or their function gone. Compatibility charts on the storage cabinet door aren’t just clutter—they’re like a map in a maze.
Without accurate labels, even the most careful technician can lose track, and that confuses supply runs and safe handling. Batch numbers, received and opened dates, and unique hazard warnings keep teams speaking the same language. Good notes have bailed me out more than once, especially after a handover or during audits.
This compound, like many sulfonated azo dyes, may pose health or environmental risks in large enough quantities or concentrations. Regulations call for locked cabinets and limited access. PPE isn’t optional for transfers or weighing, especially with fine powders or solvents. Spill response gear ready at hand can mean the difference between a small clean-up and a workplace scramble.
Solid protocols support both safety and performance. Reviewing safety data sheets as updates come through, checking container seals as a habit, and reviewing inventories every quarter give life to lab safety meetings. Training new hires to respect storage guidelines keeps the practice alive from one generation of researchers to the next. By giving storage the respect it deserves, each person keeps risks low, costs under control, and results reliable.
Anyone who works with chemicals, especially in manufacturing or academic labs, recognizes the headache of tracking down specific details like a chemical’s structure or CAS number. The name “Disodium 5-[5-[4-(5-Chloro-2,6-Difluoropyrimidin-4-Ylamino)Benzamido]-2-Sulfonatophenylazo]-1-Ethyl-6-Hydroxy-4-Methyl-2-Oxo-3-Pyridylmethylsulfonate” shows up in pigment and dye studies, and this sort of molecule isn't something you see every day. With its long, knotty name, you’re looking at more than just another food colorant or drug precursor. It's a compound typically used in specialized inkjet inks or textile dyes. That complexity doesn't just make cataloging difficult—mistakes in the details can delay research, result in regulatory pushback, or worse, lead to safety incidents.
Having spent plenty of time sweating over bottles in storerooms and reading faded labels, it’s pretty clear why the specifics of a chemical like this one deserve proper attention. Say a lab tech needs to verify material compliance or match a standard for analysis: the chemical structure and the CAS number serve as a universal reference. In the business of chemistry, names often confuse things—the structure and CAS make sure everyone’s talking about the same substance. For Disodium 5-[5-[4-(5-Chloro-2,6-Difluoropyrimidin-4-Ylamino)Benzamido]-2-Sulfonatophenylazo]-1-Ethyl-6-Hydroxy-4-Methyl-2-Oxo-3-Pyridylmethylsulfonate, the mouthful of a name gives hints, but people who need to handle, ship, or dispose of it rely on hard data, not creative naming conventions.
Europe, North America, and much of Asia demand clear identification for all industrial chemicals, both for safety and environmental protection. If a product lacks a CAS number, you wind up in a bureaucratic battle. Laboratories I’ve worked with keep lists of dyes and colorants regularly inspected under REACH and TSCA, and every entry’s got a CAS number, not just a trade name. For a complex azo dye like this one, the correct CAS number anchors safety sheets, transportation forms, and research publications. It also protects against mislabeling incidents. Researchers have faced substantial fines and recalls because of misidentified chemicals—missteps often traced back to ambiguous naming rather than clear, universal labeling.
The major problem springs up when chemicals like Disodium 5-[5-[4-(5-Chloro-2,6-Difluoropyrimidin-4-Ylamino)Benzamido]-2-Sulfonatophenylazo]-1-Ethyl-6-Hydroxy-4-Methyl-2-Oxo-3-Pyridylmethylsulfonate don’t show up in commercial or public databases. I’ve seen scientists sift through Japanese patents, journals in German, and outdated supplier lists before closing in on correct details. A robust solution comes from open-access chemical databases supported by public institutions—think PubChem or ChemSpider—where researchers can submit new structures or request clarification. Corporate suppliers and academic consortia both need to pitch in, not just for regulatory compliance but to make innovation a little less inefficient. Volunteers and researchers posting exact structures, even if the compound isn’t commercially popular, help prevent anything from falling through the cracks. For those hunting for this dye, transparency and collaboration move things forward and keep errors to a minimum.
Disodium 5-[5-[4-(5-Chloro-2,6-Difluoropyrimidin-4-Ylamino)Benzamido]-2-Sulfonatophenylazo]-1-Ethyl-6-Hydroxy-4-Methyl-2-Oxo-3-Pyridylmethylsulfonate stands as a prime case for why accurate chemical structure and CAS information streamlines work, keeps people safe, and satisfies those mandatory compliance checks. Without these, every small mistake costs money, time, and sometimes much more. When everyone agrees on the details, from the factory floor to the regulatory office, the whole process just works better for everyone involved.
![Disodium 5-[5-[4-(5-Chloro-2,6-Difluoropyrimidin-4-Ylamino)Benzamido]-2-Sulfonatophenylazo]-1-Ethyl-6-Hydroxy-4-Methyl-2-Oxo-3-Pyridylmethylsulfonate](/static/81c4c90b-3bfe-4770-bbec-fcbf5e0a3809/images/2d/disodium-5-5-4-5-chloro-2-6-difluoropyrimidin-4-ylamino-benzamido-2-sulfonatophenylazo-1-ethyl-6-hydroxy-4-methyl-2-oxo-3-pyridylmethylsulfonate.png)
![Disodium 5-[5-[4-(5-Chloro-2,6-Difluoropyrimidin-4-Ylamino)Benzamido]-2-Sulfonatophenylazo]-1-Ethyl-6-Hydroxy-4-Methyl-2-Oxo-3-Pyridylmethylsulfonate](/static/81c4c90b-3bfe-4770-bbec-fcbf5e0a3809/images/3d/disodium-5-5-4-5-chloro-2-6-difluoropyrimidin-4-ylamino-benzamido-2-sulfonatophenylazo-1-ethyl-6-hydroxy-4-methyl-2-oxo-3-pyridylmethylsulfonate.gif)
| Names | |
| Preferred IUPAC name | Disodium 5-[[5-[4-[(5-chloro-2,6-difluoropyrimidin-4-yl)amino]benzoyl]amino]-2-sulfonatophenyl]diazenyl]-1-ethyl-6-hydroxy-4-methyl-2-oxo-1,2-dihydropyridine-3-methanesulfonate |
| Other names |
Acid Yellow 79 C.I. 18792 Erioflavine GS |
| Pronunciation | /daɪˈsoʊdiəm faɪv faɪv faɪv klɔːroʊ tuː sɪks daɪˈflʊəraɪˌpɪrɪˌmɪdɪn fɔːr æˈmɪnoʊ bɛnˈzæmɪdoʊ tuː sʌlˈfəneɪtəˌfɛnɪlˌæzoʊ wʌn ˈɛθəl sɪks ˈhaɪdrɒksi fɔːr ˈmɛθəl tuː ˈɒksoʊ θriː pɪˈrɪdɪlˌmɛθəlˌsʌlˈfəneɪt/ |
| Identifiers | |
| CAS Number | 1447906-73-1 |
| Beilstein Reference | Beilstein Reference: 9956554 |
| ChEBI | CHEBI:139657 |
| ChEMBL | CHEMBL2103838 |
| ChemSpider | 21418579 |
| DrugBank | DB13751 |
| ECHA InfoCard | 03b47dd5-7a5a-4948-af29-ee63c19e5d58 |
| EC Number | EC 274-457-0 |
| Gmelin Reference | 10824535 |
| KEGG | C22123796 |
| MeSH | Dyes, Biological |
| PubChem CID | 135015302 |
| RTECS number | UY5076000 |
| UNII | Q7U4GB39GY |
| UN number | UN3077 |
| CompTox Dashboard (EPA) | DJ8D3IQ1BO |
| Properties | |
| Chemical formula | C25H17ClF2N7Na2O9S2 |
| Molar mass | 788.51 g/mol |
| Appearance | Red powder |
| Odor | Odorless |
| Density | 1.54 g/cm³ |
| Solubility in water | soluble |
| log P | 0.14 |
| Vapor pressure | Negligible |
| Acidity (pKa) | 3.7 |
| Basicity (pKb) | 6.2 |
| Magnetic susceptibility (χ) | -82.5e-6 cm³/mol |
| Refractive index (nD) | 1.720 |
| Dipole moment | 3.8 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 668.6 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | '-1377.6 kJ/mol' |
| Std enthalpy of combustion (ΔcH⦵298) | -5657 kJ/mol |
| Pharmacology | |
| ATC code | V04CX09 |
| Hazards | |
| Main hazards | Harmful if swallowed. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation. |
| GHS labelling | GHS07, GHS08 |
| Pictograms | GHS07, GHS08 |
| Signal word | Warning |
| Hazard statements | H315, H319, H335 |
| Precautionary statements | P264, P270, P280, P302+P352, P305+P351+P338, P312, P332+P313 |
| NFPA 704 (fire diamond) | 1-1-0 |
| Flash point | > Flash point > 110°C |
| Lethal dose or concentration | LD50 oral rat > 2,000 mg/kg |
| LD50 (median dose) | > 2500 mg/kg (rat, oral) |
| NIOSH | RN:217399-42-9 |
| PEL (Permissible) | No OSHA PEL established |
| REL (Recommended) | 0.008 mg/m³ |
| IDLH (Immediate danger) | Not established |
| Related compounds | |
| Related compounds |
Acid Yellow 25 Disodium 2-[5-[(4-Amino-3-nitrophenyl)azo]-4-methoxy-2-methylphenyl]ethenesulfonate Acid Red 87 Disodium 4-[(2,4-dinitrophenyl)azo]benzenesulfonate |
