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ROJO CONGO has its roots planted deep in the industrial revolution, when synthetic dyes started reshaping textiles and scientific research. During the late nineteenth century, the hunt for affordable and vibrant colorants led to a chemistry breakthrough in the form of azo dyes. ROJO CONGO found its way from a lab experiment to a staple for fabric coloring and, more surprisingly, for scientific indicators in laboratories. My early encounters with ROJO CONGO came from undergraduate chemistry kits, trusted for their reliable color shift, which always signaled that something fundamental was taking place on the molecular level. Chemists valued this substance not only for its colorfastness but for the unique chemical reactions that made it stand out from natural dyes. Over decades, demand shifted between textile applications and its steady place in analytical techniques, cementing its legacy as more than just a color—but a tool for observation and discovery.
ROJO CONGO is not a vague marketing term. It refers explicitly to a family of azo dyes characterized by deep red color, water solubility, and strong visual presence. Early fabric dyers adopted the substance for its ability to bond well with natural fibers, creating vivid hues without degrading during washing or exposure to light. Researchers and educators, though, often remember it as a go-to pH indicator: it provides a visible and quick color change across a defined pH range, acting as a diagnostic tool in chemistry experiments. Out in the field, I’ve seen dyes like ROJO CONGO debated fiercely at industry trade shows over their strengths against newer synthetic alternatives. Its role evolved and diversified, touching sectors as varied as food safety, biology, and textile arts, each finding a new way to use its reliable chromatic punch.
Take a glance at ROJO CONGO, and the metallic, deep red hue stands out. It dissolves easily in water, creating a red solution that's more than just visually appealing—in chemical circles, that color marks a conjugated system of double bonds typical of azo dyes. Its structure contains benzidine units and sulfonate groups, which make it both vibrant and distinctly polar. Handling the raw powder, you quickly realize the connection between structure and function: strong hydrogen bonds contribute to its solubility and make it interact readily with fabric molecules. The dye’s stability under most laboratory conditions lends it a robust character, which pushed manufacturers to explore large-scale production. Concentration, pH, and presence of specific salts modify its form, and these tiny shifts become visible in lab tests. Across various settings, these properties directly impact performance, translating molecular intricacies into hands-on outcomes.
Reading a technical data sheet for ROJO CONGO, certain entries always catch the eye: its exact molecular weight, typically around 696 g/mol, and its absorption maxima in the visible spectrum, centered near 497 nm. Any chemist working with this dye scans for information on purity—impurities cause more trouble than some newcomers expect—and the presence of regulated substances. In the textile world, labeling standards focus on maximum allowable limits for aromatic amines, keeping health impacts and regulatory compliance in view. Experience tells me that a clear hazard statement and instructions for storage cannot be skipped. Proper marking involves full chemical names and hazard pictograms, serving both occupational health and end-user transparency. In practice, workers appreciate straightforward instructions, not buried under jargon, but stated plainly on packaging to avoid missteps on the production floor or in the classroom.
Making ROJO CONGO on an industrial scale is not an art form so much as a science-driven process. Synthesis relies on diazotization of benzidine, followed by coupling with naphthionic acid. The method requires careful control of temperature, acidity, and timing. Small deviations can seriously impact yield and purity, which every production chemist learns the hard way. Filtration, washing, and purification steps remove unwanted byproducts that would otherwise mess with its stability or performance as a dye. As the final salt crystallizes, techniques for drying and grinding become crucial—too much moisture and the product clumps, too little and it becomes an inhalation risk. Safety controls cannot be overlooked, since several starting materials and byproducts bear toxic or carcinogenic reputations. Over time, continuous improvements in containment and waste treatment raised production standards, aiming to shield workers and the environment alike.
ROJO CONGO owes its red color and versatility to a series of strong covalent bonds and extended conjugation, a trait it shares with other azo compounds. It reacts rapidly with acids and bases, shifting color and signalizing pH changes, making it popular for scientific detection. In labs, chemists sometimes modify its structure with the goal of tuning the color range or improving fixation to specific substrates. Sulfonate groups open the door to ionic interactions, key to its affinity for fibers like cotton. Throughout its life cycle, exposure to strong reducing agents can break azo bonds, leading to decolorization—an important feature for textile recycling and wastewater treatment. My first memorable lesson about ROJO CONGO’s limitations came during a classroom experiment: under certain conditions, the dye breaks down and produces potentially harmful aromatic amines, which has stirred a wave of research around safer alternatives and stricter regulatory checks.
Market shelves and catalogs rarely stick with a single name for any chemical, and ROJO CONGO stands as no exception. Chemists know it by its systematic chemical names, manufacturers use trade designations, and regional markets attach their own variations. “Congo Red” appears on most labels, but synonyms include sodium salt names and alternative designations rooted in its origins as a benzidine-based azo dye. This patchwork of names has created some confusion, especially for those cross-referencing regulatory lists or conducting international business. My advice from years of hard-earned experience: always double-check the full chemical identifier to avoid costly mix-ups, since reactivity and safety implications hinge on which precise compound ends up in your supply chain.
Handling ROJO CONGO calls for more than gloves and a safety mask. Benzidine-based dyes carry long histories of occupational hazards, particularly linked to carcinogenic risk upon prolonged exposure. Modern regulations place firm restrictions on manufacturing and workplace handling, with robust ventilation and mandatory personal protective equipment. In my early laboratory days, instructors hammered home the importance of avoiding skin contact and inhalation—a small, invisible misstep can lead to long-term consequences. Standard operating procedures require spill kits, eye wash stations, and safe disposal containers readily available to anyone working with this dye. Environmental discharge is tightly monitored, especially since breakdown products create concerns far beyond the plant gates. Commitment to safety means not just following the rules, but constantly reviewing each step to lower exposure and environmental impact. These standards have improved markedly over time, but continual vigilance remains the only reliable route to protecting workers and communities.
ROJO CONGO’s uses reach far beyond early textile dyeing. In research settings, it provides a reliable pH indicator, shifting colors from blue to red as acidity rises—a visual cue invaluable to both teachers and scientists. Pathologists adopted it for amyloid staining, giving doctors a tool to diagnose diseases like Alzheimer’s with clarity. Its presence on the lab bench signifies not just tradition but a proven record of reproducibility. In manufacturing, ROJO CONGO once dominated cotton and natural fiber dyeing, though its use today is sharply reduced due to toxicity concerns. Despite that, specialty applications in science persist, especially in niche analytical methods. From classroom demonstrations to protein detection, this dye leaves a visible mark on how information gets gathered, communicated, and acted upon. In my experience guiding young scientists, nothing beats the moment a solution flashes from blue to red—ROJO CONGO remains a teaching staple for that reason alone.
Research involving ROJO CONGO hasn’t slowed down, even as some of its traditional roles fade. Scientists in academic and industrial labs focus on developing safer dye alternatives with lower environmental and health risks, taking cues from ROJO CONGO’s unique structure to create next-generation indicators and stains. There’s a clear trend toward “green chemistry” solutions: novel synthesis methods, biodegradable molecular modifications, and improved waste treatment. Analytical chemists explore hybrid molecules that retain the color-shifting prowess of ROJO CONGO while sidestepping the drawbacks of benzidine components. Some efforts shine in the field of biomedical diagnostics, where new dyes outperform the old gold standard in sensitivity, speed, or safety. Real innovation keeps the discussion about ROJO CONGO current, as each advancement pays homage to what made this dye indispensable in the first place. Teams with diverse expertise—chemists, toxicologists, engineers—push the envelope, ensuring that core features survive while sidestepping the pitfalls that gave rise to regulatory scrutiny.
As experience shows, no story about ROJO CONGO makes sense without a discussion on toxicity. Early adopters didn’t know much about long-term health impacts, but mounting evidence connected prolonged exposure to increased cancer risk, especially among dye plant workers. The dye’s metabolic breakdown produces aromatic amines, which further contribute to its toxic reputation. Toxicology studies forced regulatory agencies in the United States, Europe, and elsewhere to reclassify and restrict the use of benzidine-based dyes. In aquatic environments, breakdown products pose risks to organisms, impacting ecological balance even at low concentrations. Laboratory protocols adapted, phasing out ROJO CONGO in many consumer and industrial settings. For those still using it in scientific analysis, safe handling, containment, and disposal define the responsible path forward. Researchers continue to probe the interaction of ROJO CONGO and its metabolites with living systems, aiming to fill gaps in our understanding and reduce unforeseen impacts. From my perspective, this field exemplifies how science adapts to new evidence, revising practices and products in response to hard-won knowledge.
Looking ahead, the story of ROJO CONGO branches in two directions. On one hand, strict safety standards and green chemistry innovations push industries toward new alternatives that protect health and planet alike. On the other, the legacy of ROJO CONGO’s reliability as a chemical indicator keeps it relevant in academic and research settings. Modern materials scientists develop synthetic dyes that mimic its properties without the liabilities, using data from years of trials and regulatory reports. Universities and companies collaborate on biodegradable variants, aiming to keep the color-changing magic while shedding the baggage. In education, safer analogues already grace undergraduate labs, yet ROJO CONGO’s name still rings out in textbooks and research papers, attesting to its role as a benchmark in chemical science. Future prospects hinge not on nostalgia, but on the capacity to learn from the past, keep what worked, and shed what threatens well-being or the environment. Ongoing research, careful regulation, and collective engagement across industries promise to take the legacy of ROJO CONGO into a new generation of safer, more sustainable colorants and analytical tools.
Many plant lovers hunt for foliage that doesn’t just sit quietly in the background. If dramatic leaves and a bold splash of color catch your eye, the Rojo Congo is easy to spot. Originating from tropical regions—mainly Africa—this plant mixes deep green with rich burgundy-red, making any corner look more lively. Even in rooms short on sunlight, these leaves hold their glossy shine, changing slightly as they grow from new, reddish leaves to mature, darker ones.
Having kept a Rojo Congo for years, I can say it’s more than just a pretty face. Houseplants like this one offer real air-quality boosts. In 1989, NASA researchers found that Philodendrons (the Rojo Congo’s broader family) pull toxins out of indoor air. That makes them not only decorative, but useful for city apartments or home offices where ventilation runs low. Kids and pets still need watching around this plant because, like its relatives, Rojo Congo’s leaves contain compounds that can irritate lips and throats if chewed. Common sense and a high plant shelf solve that problem.
Rojo Congo doesn’t sprawl or vine like the more famous heart-leaf Philodendron. Instead, new leaves grow upright, tightly packed, giving it a bushy, manageable shape. You won’t end up with a wild tangle that dominates a bookshelf. Keep it somewhere warm, out of cold drafts, and water it just enough to keep the soil gently moist—overwatering turns leaves yellow, so letting the top inch of soil dry out pays off.
After 2020, the demand for houseplants exploded in the U.S. as people stayed indoors. The Rojo Congo saw its price rise at some nurseries, partly because it doesn’t propagate as quickly as pothos or spider plants. Growers use tissue culture—a lab method—to multiply stocks, which lets smaller plants hit shops a bit more quickly, but at a higher cost. My experiences in garden centers show customers drawn to its rich color, asking for low-maintenance recommendations. The Rojo Congo fits the bill more than finicky showpieces like calatheas or palms.
Watering gets tricky for some newcomers. Too much or too little leaves permanent marks on the foliage. I learned a simple hack: stick a wooden chopstick straight into the pot and pull it out—if it comes out mostly clean, time to water; if it’s damp and dirt sticks, wait. Feeding it a basic liquid fertilizer every month keeps leaf color crisp. Hard tap water can also stain those glossy leaves, so filtered water sidesteps white streaks.
Sharing plant stories and advice between owners helps everyone avoid the same mistakes. I’ve swapped tips on pest control—like wiping leaves down with neem oil to prevent spider mites, a problem in dry, heated homes. Social media groups or local plant swaps build a support network and keep plants in healthy rotation, so fewer end up abandoned or neglected.
As cities grow and green space feels far away, plants like the Rojo Congo connect people with nature, reduce stress, and clean the air. They reward steady, hands-on care with steady growth and reliable color. Even in small apartments—or busy offices—they remind us that nature adapts to our lives, not the other way around.
Rojo Congo pushes out leaves like a champion but sometimes gets a reputation for being dramatic. I picked up my first Rojo Congo at a plant swap. It looked so bold—thick red stems, wide green leaves with that rich hue. Not a fragile plant, but not a cactus either. Everyone asks how I kept it so healthy. My answer? I paid attention, not just with watering cans, but with a little respect for how this plant behaves.
Rojo Congo won’t thrive in a dark corner. Many guides claim it works in low light, but from experience, it sulks. I left mine by a north-facing window for a month, and new leaves grew slow and small. Once I moved it near bright, indirect sunlight, growth took off. Direct midday rays scorch its leaves, but filtered morning light works just right. Busy people put it too far from windows and end up with a sad-looking plant.
Overwatering kills more Rojo Congos than anything else. The thick roots don’t like to swim, and soggy soil means rot. I test the top inch with my finger—dry means go ahead, damp means wait another day. People use fancy moisture meters, but the real feedback is from the leaves. Curling, pale leaves usually come from too much water. Droopy leaves with dry soil mean it’s thirsty. Big pots stay wet longer, so use small ones unless the root ball fills out.
Rojo Congo grows fast in spring and summer. I feed it with a balanced liquid fertilizer every three or four weeks, and I skip it in winter. Too much fertilizer burns roots, and not enough stalls those gorgeous leaves. Always flush the soil every few months to wash out any fertilizer salts. For soil, I mix standard potting mix with chunky perlite or orchid bark. The soil should drain quickly, never turning into a swamp.
Rojo Congo likes it humid. Cold drafts or dry heaters make the edges brown and crisp. My old radiator kept leaves crispy until I got a cheap humidifier. Even a tray with pebbles and water gives a nice boost. Its leaves collect dust quickly, blocking light. Every couple weeks, I wipe them clean with a soft damp cloth—no glossy polish, just water. Healthy leaves breathe easier, and you’ll see more shine and new growth.
I check the undersides of leaves every week. Spider mites sneak in during dry months, leaving fine webbing. Fungus gnats show up with soggy soil, and mealybugs love to hide near the stems. Regular inspection stops infestations before they begin. Neem oil works well. Remove yellowing leaves with sanitized scissors so disease doesn’t spread.
Rojo Congo rewards those who listen to it—watching the leaves, checking the roots, giving morning sunlight. Growing one taught me patience and observation beats rigid schedules or labels. Every home has a different environment, so let your plant show you what feels right.
ROJO CONGO, that striking houseplant also called Philodendron ‘Rojo Congo’, stands out with leaves that look waxy and almost painted in reds and bronzes. Plenty of folks start their indoor plant journey with pothos or peace lilies, but a Rojo Congo quickly shows if something in its setup falls short—especially the lighting. I learned this after losing one too many lower leaves in my early plant-collecting years, and it all traced back to where I parked the pot in the house.
Sunlight fuels everything the plant does, from growing fuller foliage to keeping its colors bold. Tuck it in a corner that rarely sees sun, and it gives you flat, pale growth. If you shove it under a window baking in southern summer rays, those beautiful leaves can burn and crisp up fast.
ROJO CONGO enjoys light that feels like walking under a tree canopy. So, leave it near a window where morning or late afternoon rays land, but steer clear of sills blasted by the midday sun. The sweet spot has always been an east-facing window in my experience—enough morning sunshine to keep colors vibrant, never harsh enough to scorch.
Artificial light can pick up slack, too. Not all homes have ideal windows, especially in winter or in apartments. LED grow lights work wonders, giving consistent brightness without the heat. I ran a small, full-spectrum light over mine during Minnesota’s gray winters and found leaf color held up just as well as it does in June. Position the grow light about a foot above the plant, running for 10-12 hours. Every few weeks, rotate the pot to keep the leaves evenly colored and shaped.
Too little light, and stems elongate—an unmistakable sign the plant is stretching for brightness. You’ll spot gaps between the leaves, which lose color and feel thinner to the touch. Too much sun, and a yellow tinge or brown tips start popping up, telling you the light's too intense or too direct. And don’t trust all online advice—some guides ignore how seasons, latitude, even window treatments can play a role in plant health.
Many plant owners lose faith at the first sign of leaf loss. In my circle, trial and adjustment keeps the Rojo Congo thriving. I swapped a sheer curtain for a thinner fabric to bump up the brightness; friends switched rooms or bought inexpensive light meters from garden stores. Not every home has the same light, and every Rojo Congo carries a little personality.
A bit of observation goes a long way. Look to the leaves—the shinier and sturdier, the happier the plant. Catch problems early, and you rarely lose more than a leaf or two. If in doubt, start with more filtered light than less. You can always nudge the plant closer to a window or bring in a grow light if you see it flagging.
Healthy lighting means fewer pests, deeper color, and a Rojo Congo that becomes a statement in any room. Plenty of resources, from scientific journals to hands-on houseplant forums, back up the balance between light intensity and plant vigor. It comes down to matching what a rainforest floor gets: steady, gentle brightness, no harsh direct rays, and plenty of observation and small changes as needed.
Rojo Congo shows off its broad, glossy leaves and bold colors. This plant isn’t just for show — it responds to changes in the home. I’ve seen mine perk up when I figure out a routine, but too much guesswork can leave leaves droopy or curled. Learning its rhythm means less fuss and fewer surprises.
The soil in the pot tells most of the story. Once the top inch feels dry, water becomes a good idea. In my place, this usually means a glass of water every seven to ten days. If direct sunlight sneaks in, the soil dries out faster. I use my finger to check before watering, never relying on a strict calendar. The signs become clearer over time: limp leaves indicate thirst, and mushy or yellow tips tell me I’ve gotten overzealous.
Rojo Congo loves a bit of humidity. Dry air from winter heaters dries leaves out and the edges brown. A small humidifier or a tray of pebbles with water under the pot helps a lot. In my own set-up, a little morning misting keeps foliage fresh without soaking the soil. Rooms with lots of dry air or fan movement dry pots out sooner, and plants can’t hold on for as long between drinks.
I learned early that wet soil isn’t always a good thing. Waterlogged roots rot. Yellow, mushy leaves and a sour smell from the pot told me my plant sat in water far too long. Roots suffocate in wet soil, losing their grip and shriveling. Fungus gnats start buzzing — a sign I’d rather not see. Letting soil dry a little between waterings makes all the difference. I switched to a soil mix that drains well. A drainage hole in the pot sends excess water clear of the roots.
Spring and summer bring faster growth, so Rojo Congo gets thirsty quicker. Every week the soil dries up, signaling watering time. Autumn and winter, bright sun weakens, and growth slows. During these months, it’s plenty to water every other week. My plant stands near a window but out of direct sun, living its best life with this simple routine.
The American Society for Horticultural Science says overwatering is the top reason houseplants die. The Rojo Congo’s tropical roots mean it handles a missed watering better than sitting in soggy compost. Water quality counts too. I let tap water sit overnight so chlorine evaporates. That step spares sensitive root hairs from chemical burns, a tip I picked up after noticing odd leaf marks.
Learning to care for Rojo Congo never stops. Each plant reacts to its corner of the house, the temperature and the light. Listening to its cues works better than memorizing a schedule. Over time, the plant finds its stride — and so do I.
Philodendron ‘Rojo Congo’ attracts plant lovers because of its glossy, dark leaves and ability to live indoors with less sunlight. I see these plants in offices, apartments, and even vet clinics. People enjoy plants like this because leafy greenery makes any space feel friendlier and more alive. Caring for houseplants also helps people slow down after work and pay attention to small changes. Yet, not every houseplant works well in homes with pets.
The concern with ROJO CONGO, and many other philodendrons, comes down to its sap. Inside the leaves and stems, microscopic crystals of calcium oxalate sit in bundles. Cats and dogs chew on things—especially when left alone. Nibbling even a small piece of ROJO CONGO brings serious discomfort. I’ve seen dogs drool uncontrollably and cats try to paw at their mouths after a quick bite. This isn’t a mild issue—the plant can cause burning pain in the mouth, swelling of the lips and tongue, and difficulty swallowing.
In rare cases, a pet that eats a large chunk might face vomiting, trouble breathing, or show signs of stomach upset. The ASPCA warns about all philodendrons, not just ROJO CONGO. Years ago, my neighbor’s young dog needed an emergency vet trip after chewing a philodendron leaf. He lived, but the bill and the fright left a big mark.
Calcium oxalate crystals pierce soft tissues. For a pet, this means a raw, burning tongue and a sore throat. Most pets get the message fast and spit the plant out, but chewed-up pieces can stick around in the mouth and cause more irritation. Some online advice suggests a single, tiny bite brings only mild symptoms. That might be true for an adult dog but not a kitten or a smaller animal. My own experience has taught me that pets don’t always stop at one bite. Curious puppies and cats may keep munching, especially if they’re bored or teething.
If you notice your cat drooling, pawing at her mouth, or struggling to swallow, take a look around for missing leaves or chewed stems. In any case of plant chewing, rinse the mouth with cool water and call your vet. Small pets and young animals can lose fluids rapidly from vomiting or excessive drooling, and swallowing plant parts brings bigger risks.
Serious poisoning from ROJO CONGO isn’t common, but every pet owner I know would rather avoid the risk than test their luck. Some cats and dogs wind up at the vet for overnight fluids just to manage pain and dehydration from a bad chew.
Plant lovers with pets don’t have to give up greenery altogether. Plenty of safe options add color to a room without the worry. Spider plants, Boston ferns, and parlor palms grow well indoors and don’t bother curious pets. In homes where plants like ROJO CONGO already stand, placing pots up high helps—but cats often find a way. If you have both, it’s smart to choose pet-friendly plants, or at least keep the toxic ones out of reach and always know the name of every plant in your home.
I’ve learned to ask about toxicity every time I pick a new plant. No style upgrade is worth a scared, sick pet or a rush to the animal ER. Every houseplant owner with pets deserves that peace of mind.
| Names | |
| Preferred IUPAC name | 1-amino-4-[(4-diaminophenyl)diazenyl]benzene-3,4-disulfonic acid |
| Other names |
PHILODENDRON ERUBESCENS PHILODENDRON RED EMERALD |
| Pronunciation | /ˈroʊ.hoʊ ˈkɒŋ.ɡoʊ/ |
| Identifiers | |
| CAS Number | 3530-19-6 |
| Beilstein Reference | 128701 |
| ChEBI | CHEBI:86166 |
| ChEMBL | CHEMBL272311 |
| ChemSpider | 14623 |
| DrugBank | DB11110 |
| ECHA InfoCard | String: 100.002.889 |
| EC Number | EC 221-062-5 |
| Gmelin Reference | Gmelin 1561 |
| KEGG | C.I. 22120 |
| MeSH | Congo Red |
| PubChem CID | 11313 |
| RTECS number | BO9625000 |
| UNII | F19L2M7D5H |
| UN number | UN1219 |
| Properties | |
| Chemical formula | C32H22N6Na2O6S2 |
| Molar mass | 696.98 g/mol |
| Appearance | Large, glossy, heart-shaped leaves with a deep burgundy-red to dark green color; new growth emerges bright red and matures to a rich, dark hue; compact, upright, and bushy form. |
| Odor | Fresh, floral |
| Density | 0.87 g/cm³ |
| Solubility in water | Soluble |
| log P | 5.15 |
| Acidity (pKa) | ~4.1 |
| Basicity (pKb) | 10.0 |
| Magnetic susceptibility (χ) | '−0.000012' |
| Refractive index (nD) | 1.631 |
| Viscosity | 10 - 20 CPS |
| Dipole moment | 12.9872 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 211.0 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | no data |
| Pharmacology | |
| ATC code | V03AZ04 |
| Hazards | |
| Main hazards | May cause cancer. Causes serious eye damage. Causes skin irritation. May cause an allergic skin reaction. Suspected of damaging fertility or the unborn child. Harmful to aquatic life with long lasting effects. |
| GHS labelling | GHS07,WARN |
| Pictograms | Flame, Exclamation mark, Health hazard |
| Signal word | DANGER |
| Hazard statements | Harmful if swallowed. Causes serious eye irritation. May cause respiratory irritation. Suspected of causing cancer. |
| Precautionary statements | Keep out of reach of children. Do not breathe dust. Avoid contact with skin and eyes. In case of insufficient ventilation, wear suitable respiratory equipment. If swallowed, seek medical advice immediately and show this container or label. |
| NFPA 704 (fire diamond) | 3-0-0 |
| Autoignition temperature | 600°C |
| Explosive limits | Lower Explosive Limit: 4.8%, Upper Explosive Limit: 45.6% |
| Lethal dose or concentration | LD50 (oral, rat): >15,000 mg/kg |
| LD50 (median dose) | LD50 (median dose): 2,930 mg/kg (rat, oral) |
| NIOSH | NIOSH: "TC-84A-8146 |
| PEL (Permissible) | 0.5 mg/m3 |
| REL (Recommended) | 60 kg/ha |
| Related compounds | |
| Related compounds |
Azure A Azure B Azure C Methylene blue Trypan blue |
