|
HS Code |
550827 |
| Cas Number | 118-47-8 |
| Molecular Formula | C10H9N2O3S |
| Molecular Weight | 237.25 g/mol |
| Appearance | White to off-white powder |
| Melting Point | 330-332°C (decomposes) |
| Solubility In Water | Soluble |
| Density | 1.55 g/cm³ |
| Synonyms | 1-(4-Sulfophenyl)-3-methyl-5-pyrazolone, MSP, Metz' Reagent |
| Ph 1 Solution | 4.5-6.0 |
| Storage Conditions | Store in a cool, dry place, tightly closed |
| Purity | Typically ≥98% |
| Ec Number | 204-272-6 |
| Usage | Analytical reagent, colorimetric detection of iron |
| Hazard Statements | Irritant |
As an accredited 1-(4-Sulfophenyl)-3-Methyl-5-Pyrazol One factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 500g white HDPE bottle with a screw cap, labeled with product name, CAS number, hazard pictograms, and supplier details. |
| Container Loading (20′ FCL) | 20′ FCL loads 10,000 kg net of 1-(4-Sulfophenyl)-3-Methyl-5-Pyrazol One, packed in 25 kg woven bags on pallets. |
| Shipping | 1-(4-Sulfophenyl)-3-Methyl-5-Pyrazol One is shipped in tightly sealed containers to protect it from moisture and light. It is classified as non-hazardous but should be transported in accordance with standard chemical handling procedures. Appropriate labeling and documentation are provided to ensure safe and compliant shipment. Avoid extreme temperatures during transit. |
| Storage | **1-(4-Sulfophenyl)-3-Methyl-5-Pyrazol One** should be stored in a tightly sealed container, in a cool, dry, and well-ventilated area. Protect from light, moisture, and incompatible materials, such as strong oxidizers. Store at room temperature and clearly label the container. Ensure appropriate chemical safety protocols are followed and keep away from sources of heat or ignition. |
| Shelf Life | Shelf life of 1-(4-Sulfophenyl)-3-Methyl-5-Pyrazol One is typically 5 years when stored in a cool, dry place. |
Competitive 1-(4-Sulfophenyl)-3-Methyl-5-Pyrazol One prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615371019725 or mail to sales7@boxa-chem.com.
We will respond to you as soon as possible.
Tel: +8615371019725
Email: sales7@boxa-chem.com
Flexible payment, competitive price, premium service - Inquire now!
At our chemical facility, we do more than batch out drums and tote loads. We pay close attention to the demands of our partners worldwide, who work with dyes, developers, and specialty chemical blends. Too often, the story about chemical supply chain ends at the distributor’s warehouse or with a generic product sheet. We think the real story starts with synthesis on the factory floor and ends with the satisfaction of end users—whether they run a textile dye house or a busy analytical lab.
Nobody in our production team mistakes 1-(4-Sulfophenyl)-3-Methyl-5-Pyrazol One for a run-of-the-mill intermediate. The moment this material started showing advantages over the much-touted EDTA family or older pyrazolone derivatives, we began to hear from formulators who were tired of unexplained variability in their color intensity or signal response. It’s not just a catalog number—it’s a solution to headaches that usually don’t get discussed outside technical support calls.
Producing 1-(4-Sulfophenyl)-3-Methyl-5-Pyrazol One is a multi-step walk that rewards precision at every stage. We take special care with the introduction of the sulfonic acid group because inconsistent sulfonation can cripple downstream solubility or signal stability. Only rigorous controls and years of batch experience deliver the fine-tuned product customers now expect.
Crystallization remains the crucial finish for our team. Impurity profiles that seem minor on paper can sabotage color indices or chelation efficiency when scaled up for industrial runs. We go the extra length with careful solvent choices that minimize residual organics and give a consistent solid—usually a high-purity, pale powder that dissolves clear and leaves no unexpected haze.
Laboratories tend to chase ideal conditions; production environments throw in a thousand unpredictable variables. Keeping particle size distribution consistent, ensuring fast dissolution in water, and guaranteeing that the final material won’t throw odd signals—these are practical problems that come up every week. Our QC staff doesn’t stop at confirming a CAS or melting point. They run application-mimicking batch trials that predict performance hiccups before the product leaves our dock.
Attention to real-world application runs through our entire batch record process. From the temperature at which methylation occurs to the duration of sulfonation, we’ve logged the little changes that mean the difference between a failed analytical test and a grade-A shipment. That’s why customers writing in with “clean spectra, batch-to-batch, zero visible contamination” stand out in our records—feedback like this gets circulated at our process review meetings.
1-(4-Sulfophenyl)-3-Methyl-5-Pyrazol One started gaining ground as a replacement in dye manufacturing and photometric analysis teams who once relied on older pyrazolone compounds. Our production engineers noticed most clients didn’t want the broadest possible range of specs. They preferred consistent absorbance at the right wavelength, stable reactivity in complex matrices, and straightforward handling. If you’ve been saddled with raw materials that clump, cake, or throw particulates, you’ll recognize those pains.
Lab technicians switching from less pure sources have commented that consistency in colorimetric detection curves is what keeps them ordering from direct producers. High-purity product means no weird noise in calibration curves, and no trouble reproducing results day after day. The feedback loop between our filter-press team and QC chemists ensures every kilo is ready for fast integration into downstream processes.
Many new customers ask what sets our product apart from other suppliers or from older compounds such as 1-Phenyl-3-Methyl-5-Pyrazolone. What we hear often is, “batch consistency, dust control, and moisture content”—not just what’s printed on a certificate of analysis, but how the material actually behaves in a mixing tank or weigh room.
While both compounds play a role in the lab, the added sulfonic group in 1-(4-Sulfophenyl)-3-Methyl-5-Pyrazol One opens up water solubility. This means faster dissolution, easier mixing, and far less caking over time, especially in humid environments. A less soluble analog clogs systems, ruins filters, and disrupts automated processing. More than once, a frustrated plant manager has called us about this very issue after trying a less functional compound.
Customers who’ve moved from less potent or less pure suppliers notice the difference with our material after just a few test batches. There’s no lag time fussing over dissolving powders, and product blend times shorten. Waste is reduced because the full content of each drum integrates efficiently.
We set shelf-stable moisture levels and hold particle size to a tight range. Granule sizing and evenness come from cumulative tweaks—changes in dryer settings, screening techniques, blending habits. These measures carry over to better solubility and improved handling in both lab and production settings. Each order moves out the door tailored to ensure ease-of-use, not just to hit a specification on paper.
If you work in color chemistry, chromatography, or analytical detection, it makes a difference. In dye manufacture, cleaner end products stem straight from high-purity intermediates. Color reproducibility stays high, and abnormal background signals become rare rather than routine. For analytical labs—where this compound steps in for spectrophotometric reagent roles—the assurance is immediate: low background and crisp response.
Our rail and export teams have observed that global shippers love the stable nature of this product. Freight moisture shifts, container swings from tropical to cold climates, and even delays at customs all put less stress on a batch that resists caking and has optimized granule size. Bulk buyers absorb less loss to handling and can store loads longer without worry.
We’ve watched certain customers try to stretch old standbys like 1-Phenyl-3-Methyl-5-Pyrazolone, only to hit a wall with batch reproducibility or solubility bottlenecks. Moves in environmental compliance increasingly steer formulators away from less soluble, less process-friendly intermediates. Sulfonated analogs fit stricter wastewater management guidelines, since they don’t persist as long in run-off. Laboratories concerned about “unknowns” in spectra and possible regulatory rubs lean into materials with cleaner side product profiles.
Since standardization matters, our plant handles each campaign as a learning opportunity. QC pulls cross-sectional samples, not just top and bottom of a bulk load. Customer return feedback cycles into full-batch reviews. Repackagers notice granular size stays the same, and buyers managing internal QC see spectra line up batch after batch. Consistency on these metrics is what keeps us in the direct manufacturer’s seat, not chasing complaints after product leaves our facility.
With specialty chemicals, it doesn’t take much to derail a smooth operation. Our technical service group receives unusual requests—tailoring granules or pre-dissolving pilot batches—especially from teams trialing new dye formulations or integrating automated dosing systems. These aren’t “standard” specs, but for fitted chemical solutions, small tweaks matter. Our crew logs application problems and traces them back up the production line. That way, improvements emerge from lived user experience, not distant technical memos.
One global client called us out for delivering a product that handled better in high-speed weighing systems, trimming measurable downtime. They went from routine recalibration headaches to uninterrupted runs. This kind of user-driven commentary moves right into our next scale-up review, where we discuss further improvements in screening and anti-dust treatment.
Some analytical clients pursue ever-tighter detection limits. Our role is to ship cleaner product, with lower trace metals and less organic carryover. Minimizing contaminants isn’t just a theoretical exercise. For labs investing in high-sensitivity equipment, a “cleaner” 1-(4-Sulfophenyl)-3-Methyl-5-Pyrazol One equals fewer false signals, better peaks, and more usable results per run. We treat these requests with gravity, not as add-ons.
Bulk storage tests in our own barrels keep surprises to a minimum. Caking, lumping, or visible discoloration trigger deeper digs into root causes. Repeated cycles of open-close handling mirror what customers face in ongoing operations. Adjustments in bulk packaging and anti-caking measures stem directly from these in-house trials.
The material is robust enough for extended shelf life in varied climates. Over decades manufacturing, we found that temperature swings or transit delays don’t degrade quality or generate storage odors, as sometimes happens with less stable intermediates. Field reports from partners running outdoor storage affirm this reliability. Nobody wins if a vital batch fails in the warehouse or loses value just sitting in a drum.
There’s an assumption out there that all chemical products flow through a similar pipeline, passing through so many hands that the difference between manufacturer and distributor fades. Our approach rejects that shortcut. In every kilo of 1-(4-Sulfophenyl)-3-Methyl-5-Pyrazol One, you see controlled lineage—from raw material sourcing to final packaging. No commingling, no broad-stroke blending from multiple facilities. This focus ripples through to smoother application work and easier troubleshooting.
For those who’ve had to chase after off-spec lots or unexplained batch failures, the discipline of a single-source manufacturer with transparent records turns into real peace of mind. Traceability shows up at the sample level; records actually match production runs. Our audit trail can follow each drum back to a controlled batch log, complete with real-time correction notes.
The landscape changes fast. Clients in textiles or industrial dyeing face regulatory, environmental, and competitive pressures. Our technical team keeps ahead by learning from every batch that crosses our plant floor. If a customer flags potential discharge issues or worries over polymer compatibility, we evaluate not just with on-paper properties, but with full-scale process trials. One dyehouse project turned our attention to the need for even purer intermediates, which led to revised purification steps and stricter dust control.
Our chemists carefully select raw material sources with compliance in mind. The total absence of regulated heavy metals, consistent with EU REACH and other standards, is audited regularly. More than lip service, it’s a practice built into every reorder and every container loaded. Running a clean, modern manufacturing operation keeps surprises out of customer processes. Over the years, repeat audits from multinational clients have helped refine our own sourcing demands.
We often field inquiries that rarely turn up on product sheets. Plant engineers wonder about optimal feed rates for blending tanks, or how the material performs in small-run powder dosing systems. Analytical chemists ask about possible background peaks or stability in long-term storage. Our technical team provides answers that draw from actual production and field use—not generic advisories or cut-and-paste warnings.
We've handled requests to modify packaging, tweak granulation for automated dealers, or even produce dissolved forms for quick solution prep in laboratory settings. Not every manufacturer will flex batch parameters or packaging that way. Doing so means a closer partnership where both sides share insights that keep production lines running.
In one instance, a buyer struggling with dusting and static during weighing called for a modified granule size. We trialed process changes at the pilot level, and the solution reduced airborne powder by nearly half. Any client facing similar difficulties can count on a willingness to invest time and expertise to meet their requirements—not simply shipping a standard product and calling the job done.
As industry demands shift, the old “good enough” approach gives way to chemistry that listens to end-user realities. We continue to refine our offering of 1-(4-Sulfophenyl)-3-Methyl-5-Pyrazol One because our partners keep us grounded in what matters—not only chemical purity, but practical runnability and reliability in the factory and the lab. Each detail, from synthetic route improvements to packaging reviews, reflects lessons picked up on the ground and carried through by people who work with these materials every day.
With every bulk load, every special request, and every feedback note, we maintain an open channel with clients adapting to tighter tolerances and environmental boundaries. That’s the strength of dealing directly with a real manufacturer, not just a name on an invoice. Each batch carries the stamp of attention, correction, and care that only comes from seeing a product through its full life—from chemical design to end application.