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HS Code |
777111 |
| Chemical Name | Rosolic Acid |
| Synonyms | Aurine; Corallin |
| Cas Number | 603-45-2 |
| Molecular Formula | C20H14O3 |
| Molecular Weight | 302.33 g/mol |
| Appearance | Reddish-yellow powder |
| Melting Point | 316 °C (decomposes) |
| Solubility | Slightly soluble in water; soluble in alcohol |
| Usage | pH indicator, dye, laboratory reagent |
| Color Change Range | pH 5.2 (yellow) to pH 7.0 (red) |
| Storage Conditions | Store in a cool, dry place; keep container tightly closed |
As an accredited Rosolic Acid factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Rosolic Acid is typically packaged in a 25g amber glass bottle with a secure screw cap, labeled with hazard and product information. |
| Shipping | Rosolic Acid is shipped in tightly sealed containers, protected from light, moisture, and incompatible substances. Packages are clearly labeled and handled as hazardous material, following relevant safety and regulatory guidelines. During transit, precautions are taken to prevent spills, leaks, or exposure, ensuring safety for handlers and the environment. |
| Storage | Rosolic Acid should be stored in a cool, dry, and well-ventilated area, away from direct sunlight and incompatible substances such as strong oxidizers. The container must be tightly closed and clearly labeled to prevent contamination and moisture absorption. Handling should involve proper protective equipment to avoid inhalation or skin contact. Keep away from ignition sources and store according to chemical regulations. |
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Purity 98%: Rosolic Acid with purity 98% is used in analytical chemistry laboratories for pH indicator preparations, where it ensures precise and reliable colorimetric analysis. Melting Point 220°C: Rosolic Acid with a melting point of 220°C is used in high-temperature staining protocols in histology, where it maintains structural integrity during sample processing. Particle Size ≤10 μm: Rosolic Acid with particle size ≤10 μm is used in fine particulate formulations for inkjet printing, where it provides uniform dispersion and sharp image resolution. Molecular Weight 272.26 g/mol: Rosolic Acid with molecular weight 272.26 g/mol is used in organic synthesis for fluorescent dye production, where accurate stoichiometry improves yield and purity. Stability Temperature up to 100°C: Rosolic Acid with stability temperature up to 100°C is used in biologically relevant staining solutions, where it resists degradation and extends reagent shelf-life. Aqueous Solubility 5 mg/mL: Rosolic Acid with aqueous solubility of 5 mg/mL is employed in biochemical assays, where it achieves efficient dye dissolution for consistent reagent performance. |
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Rosolic Acid earned its reputation in laboratories and industrial settings for its reliable performance. Used as a pH indicator and laboratory reagent, this aromatic compound shows its versatility in different analytical and manufacturing processes. Some may remember the deep coral-red hue it gives off, either in water or alcohol, which makes it easy to spot in titrations and other experiments. That’s where the value of Rosolic Acid stands out—clear, pronounced color change that doesn’t leave the user in doubt.
Chemists recognize Rosolic Acid by its molecular formula C20H14O5. Often available in powder or crystalline form, the product generally carries a high purity mark—usually around 98% or higher—meaning that users can rely on consistent results with every batch. The melting point typically ranges from 316°C to 320°C, which lends thermal stability during most laboratory operations.
Most reputable suppliers ensure each batch reflects tight quality controls and minimal impurity levels. Moisture and insoluble matter rarely make an appearance in dependable stock, so the end user faces fewer headaches during sensitive experiments or syntheses. Rosolic Acid does not tend to clump or cake under normal storage conditions. Its shelf life stretches for years if kept cool and dry in an amber bottle, as light or moisture can break down any organic dye.
Rosolic Acid sees daily use as a pH indicator between range 5.0 to 7.0, where it shifts color from yellow to deep red, depending on the acidity of the medium. Anyone who’s conducted titrations during organic or analytical chemistry labs probably grew familiar with that vivid transition. Beyond school or university labs, industrial QC technicians rely on Rosolic Acid in similar titrimetric procedures, where clear endpoint detection is critical.
There’s more to Rosolic Acid than pH measurement, though. Histologists and microscopists count on its staining ability, applying it as a counterstain in tissue slides or for highlighting neuronal cells. Its affinity for certain tissue structures under a microscope gives it a well-earned spot among biological dyes. Rosolic Acid finds roles in ink formulation, plastics research, and some dye manufacturing routes, although less so these days compared to newer, specialized compounds.
Decades of experience show that Rosolic Acid behaves consistently as long as one handles it with care. The powder can irritate skin and mucous membranes, so gloves and goggles never go out of style. Even after years in the lab, users come back to Rosolic Acid for its reliability and straightforward handling protocols.
Rosolic Acid stands apart from indicators such as phenolphthalein or methyl orange. Each indicator has its strengths, but Rosolic Acid fills a unique place for its pH transition range. Phenolphthalein might serve better in basic titrations, flipping from colorless to pink above pH 8.2. Methyl orange, by contrast, works down at lower pH levels.
When working with biological stains, Rosolic Acid brings a certain specificity. Stains like eosin and Hematoxylin often take center stage in histology, yet only Rosolic Acid lends that coral red hue and reliable counterstaining for brain and nerve cells. Its chemical structure provides a different set of binding sites within tissues, so what works for one application may not for another.
In terms of safety, Rosolic Acid’s handling profile tracks closely alongside phenolic dyes. Both require careful attention, but years of documented use give a well-established safety footprint if basic precautions are followed. Chronic exposure risks remain far lower compared to aniline dyes, especially where skin absorption or respiratory irritation come into play. No dye is completely benign, but a smart lab tech recognizes which compounds pose more significant danger.
Those who spend time running analytical or teaching labs know the headaches that unreliable chemicals can cause. One batch of dye might show a strong endpoint; another might fade out too soon or leave muddy hues. Even in large-scale production, dye purity impacts not just results, but safety and equipment longevity. That’s why Rosolic Acid’s purity claims matter so much—less background interference, clearer reactions, and lower risk of side products.
In routine practice, small impurities can stack up across hundreds of tests or preparations. Water-insoluble grit, leftover solvents, or dust introduce uncertainty and can gunk up fine glassware and instrument tubing. Pay attention to product certificate of analysis before placing an order—the more transparent the supplier, the less trouble awaits down the road.
Anyone who worked through a chemistry degree or who’s spent hours wrangling titrations in a teaching lab recognizes the way Rosolic Acid cuts through confusion during pH endpoint detection. The color shift reads easily in daylight or under standard lamp lighting. That certainty can shave precious minutes off every experiment, especially when checking many samples back-to-back.
In my experience, Rosolic Acid meets its real test in student or training labs—where mistakes multiply and chemical stock takes a beating. Container lids get left ajar, scoops pick up unintended moisture, and powders mix in less-than-ideal fashion. Through it all, batches with high purity consistently yield better results. Fewer repeat tests, less wasted time, and students build confidence seeing a repeatable result each time.
The biggest challenge I see comes down to storage. Rosolic Acid slowly absorbs humidity and can degrade under prolonged sunlight. Those expensive, amber glass bottles serve a clear purpose—they keep the dye potent toward the tail end of its shelf life. One missed storage protocol, and that bright, sharp red turns dull before anyone gets a chance to use it.
No chemical indicator deserves a cavalier approach, and Rosolic Acid is no exception. Powdered dyes can linger in the air, so it’s smart to open containers in well-ventilated areas. Old habits, pressed from years of lab work, make a difference—never scoop above face level, always recap after each use, and label secondary containers well in advance.
Contact with Rosolic Acid means reaching for gloves and a lab coat at minimum. Accidental spills clean up easily enough on a benchtop if fresh, but letting dye settle into grout or porous surfaces leaves stubborn stains. Ordinary cleaning solutions struggle to lift that deep reddish tint after a few days. Inhalation hazards remain low if handled with respect, and no mass-market industrial accidents involving Rosolic Acid have set off industry-wide alarm bells, but real safety lessons come from seeing what happens when attention falls short.
Proper disposal often gets overlooked with dyes. They should never go down the sink, especially since municipal water treatment isn’t built to handle persistent organic substances. Collecting waste for specialized processing or incineration best fits responsible laboratory practice. Glassware used with Rosolic Acid cleans up faster with a shot of ethanol followed by warm water rinsing. These steps turn good safety protocols into regular, unconscious habits, which is where real protection comes from.
Over the past two decades, digital sensors and automated titration machines have taken on jobs once handled solely by indicators like Rosolic Acid. Still, in resource-limited settings, manual titrations and classical chemical stains stand as the workhorses of everyday analysis. No battery or computer malfunction interferes with a direct color change.
A good indicator stands the test of time and adapts to changing lab environments. For researchers operating on tight budgets, reliable stock like Rosolic Acid gives room to calibrate and teach classic analytical techniques to the next generation. Many modern science instructors notice that hands-on chemical observation—watching the color shift at the endpoint—teaches scientific perception in a way that no digital readout can replicate.
The chemical market today floods with dozens of indicator dyes, each touting specific strengths and technical details. Some firms push cheaper, quick-to-manufacture replacements. Yet decades-old brands built their reputations on delivering Rosolic Acid that doesn’t disappoint. In my own purchasing experience, chasing deep discounts too often led to extra troubleshooting or outright unusable powder.
Globally, suppliers based in North America, Europe, and parts of East Asia dominate the market for high-purity Rosolic Acid. Ensuring a consistent product run means meeting regulatory expectations, such as ISO quality standards. Not every supplier hits this mark. Cross-checking batch numbers, reading into lots, and joining shared user forums help verify claims. A few minutes spent reading behind-the-scenes user reviews and scientific purchasing group feedback pays off. In large teaching labs, coordinating across several campuses or research groups often lands better bulk purchasing prices, maintaining both quality and cost control.
Rosolic Acid descends from the triphenylmethane dye family. Its synthesis, dating back to the 19th century, involved reacting phthalic anhydride with phenol under the influence of sulfuric acid. The rich coral-red outcome, still appreciated by chemists today, once found fleeting fame in textile dyeing, before more resilient dye classes overtook it in commercial settings.
The molecular structure of Rosolic Acid includes three phenolic rings, enhancing its capacity for sharp pH color transitions. This arrangement also explains its success as a biological stain. The aromatic system binds efficiently with tissue proteins, targeting neural and connective fibers for detailed examination by trained microscopists. Small crowd of users still value these staining characteristics in research labs—sometimes forensics, sometimes paleontology, often basic academic research. Anything requiring both clarity and precision in observation draws from Rosolic Acid’s toolbox.
Environmental discussions rarely touch on laboratory dyes, yet chemicals like Rosolic Acid contribute to total organic waste if mishandled. The conversation about green chemistry and sustainable practices hasn’t ignored dye manufacturing altogether. Certain companies now document lower-emission synthesis models, reduced use of chlorinated solvents, and minimized waste streams. Users in regulated environments, such as universities or research hospitals, sometimes request product traceability and origin disclosure. This ensures not only high-quality stock but also reduced environmental footprint and safer conditions for synthesis workers.
Although Rosolic Acid does not appear in large-scale industrial wastewater, small scale, accumulated impact adds up. Disposal guides aimed at university and high-school labs now recommend cataloging dye stock and scheduling routine replacements and bulk disposals through hazardous waste channels. Institutions may rotate between older and newer dyes as part of internal sustainability audits, especially where safer or low-toxicity alternatives arrive on the market.
Use patterns for Rosolic Acid look steady in most academic and research circles. New analytical instruments and non-dye-based detection systems continue gaining ground, but nothing completely eliminates the value of a steadfast indicator on the bench. For microscopists and histologists chasing particular color contrasts, traditional chemical stains still offer more hands-on control than automated imaging software.
Many educators stress the importance of preserving fundamental laboratory skills. Using indicator dyes such as Rosolic Acid connects students with chemistry’s practical foundations—handling, measuring, and observing direct chemical change. Those tactile experiences build intuition that supports more advanced learning later on. Sidelining these skills, or replacing them too early with digital surrogates, might leave future chemists less resourceful in the face of unexpected lab challenges.
Some lab supervisors find routine quality checks maintain dye potency over longer periods. Setting up a yearly check—where a lab tech records absorbance or tests a small sample against a standard—gives early warning if the main stock starts breaking down. Another method involves splitting large orders into smaller, well-labeled containers. Each jar opens less often, so air and moisture reach only a small portion at a time. This approach guards the purity of the unexposed stock and extends service life—especially useful in labs with modest budgets.
Supply chain disruptions affect every chemical, including dyes. Advanced planning for multi-month supply gaps, whether due to customs delays or seasonal shipping interruptions, helps laboratories remain stable. Building cooperative relationships between nearby labs or departments allows short-term stock sharing during shortages, which minimizes research or educational downtime.
Rapid shifts in chemical regulations, particularly for substances on watchlists, can quickly change the landscape. Lab managers and procurement officers stay informed through association newsletters, online databases, and regulatory updates. Early adaptation to regulatory changes, such as required documentation or restriction on certain laboratory uses, avoids last-minute project halts and product disposal headaches.
Rosolic Acid delivers trust and consistency to generations of chemists, science educators, and industrial technicians. Its ease of use, clear pH sensitivity, distinctive deep red color, and robust safety data all build a dependable picture. Users experience fewer hiccups with well-produced Rosolic Acid, whether running a battery of pH titrations or staining fragile tissue sections.
Staying aware of real-world storage and handling hazards means smoother daily operations—better results, less cleanup, and safer personnel. As laboratories look to modernize or adapt to global supply issues, Rosolic Acid’s proven track record and understood characteristics give peace of mind that outlasts technological fads. Experienced users return to it for a simple reason: in practical chemical work, there’s just no substitute for reliability earned over decades.