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HS Code |
199387 |
| Chemical Name | 4-Methylthiazole-5-Carboxylic Acid |
| Cas Number | 50890-83-0 |
| Molecular Formula | C5H5NO2S |
| Molecular Weight | 143.16 g/mol |
| Appearance | White to off-white solid |
| Melting Point | 120-125°C |
| Solubility Water | Moderately soluble |
| Purity | Typically ≥98% |
| Boiling Point | Decomposes before boiling |
| Storage Conditions | Store at 2-8°C, tightly sealed |
| Smiles | CC1=NC=C(S1)C(=O)O |
| Inchi | InChI=1S/C5H5NO2S/c1-3-6-2-4(9-3)5(7)8/h2H,1H3,(H,7,8) |
As an accredited 4-Methylthiazole-5-Carboxylic Acid factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | A 25-gram amber glass bottle with a screw cap, clearly labeled “4-Methylthiazole-5-Carboxylic Acid,” and hazard symbols. |
| Shipping | 4-Methylthiazole-5-Carboxylic Acid is shipped in tightly sealed, chemical-resistant containers to prevent contamination and degradation. It is transported in compliance with relevant regulations, including labeling and safety documentation. The package includes appropriate cushioning and is handled at ambient temperature unless otherwise specified by the product’s safety data sheet (SDS). |
| Storage | 4-Methylthiazole-5-carboxylic acid should be stored in a cool, dry, and well-ventilated area away from incompatible substances, such as strong oxidizing agents. Keep the container tightly closed and protected from moisture and light. Store at room temperature and avoid excessive heat. Ensure proper labeling and handle in accordance with good laboratory practices to prevent contamination and degradation. |
Applications of 4-Methylthiazole-5-Carboxylic Acid in Industrial ManufacturingAs a direct manufacturer specializing in fine chemicals, we supply high-purity 4-Methylthiazole-5-Carboxylic Acid to advanced sectors that rely on precise synthetic inputs. Below, we detail core application tracks where this intermediate delivers value in regulated, formulation-driven, and quality-critical downstream industries. 1. Active Pharmaceutical Ingredient (API) SynthesisAPI manufacturers depend on 4-Methylthiazole-5-Carboxylic Acid as an essential precursor in constructing thiazole-based molecular frameworks found in targeted drug molecules, including anti-infective and metabolic modulators. Process engineers typically introduce the carboxylic acid moiety at the early stage of heterocyclic assembly to achieve structural integrity and functionalization demanded by finished intermediates. Its purity and low residual solvent are essential for meeting global drug quality benchmarks. Industry compliance standards
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2. Agrochemical Active Ingredient Formulation4-Methylthiazole-5-Carboxylic Acid serves as a building-block for the development of modern thiazole-ring crop protection agents, including herbicides and fungicides. Agrochemical formulators introduce it at dedicated high-purity synthesis stages to ensure regulatory-compliant residue management. Its use allows downstream partners to enable crop-specific efficacy and tailor active loadings for resistance management. Industry compliance standards
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3. Pharmaceutical Intermediate Supply for Contract ManufacturingCMO partners source 4-Methylthiazole-5-Carboxylic Acid as a key intermediate for multistep custom synthesis of complex molecules, especially where thiazoles function as privileged scaffolds. CMOs adhere to full traceability and require consistent batch specifications, aligning with their own quality release protocols and third-party audits. Industry compliance standards
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4. Specialty Fine Chemical Synthesis (Flavor & Fragrance Intermediates)In the specialty chemicals sector, some flavor and aroma compounds originate from thiazole derivatives. R&D and production chemists employ our carboxylic acid to furnish functionalized thiazole rings for use in high-value fine fragrances and flavoring agents. Its addition-level management is tightly regulated due to downstream purity and toxicity thresholds. Industry compliance standards
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5. Advanced Material Chemistry–Heterocyclic Building Block ProductionAdvanced materials labs employ 4-Methylthiazole-5-Carboxylic Acid as a heterocyclic core in the creation of specialty polymers and organic electronic materials. Its unique combination of alkyl and carboxylic groups enables the synthesis of monomers for further polymerization and functional materials manufacturing, often supporting electronic device performance or specialty coatings. Industry compliance standards
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Every day, plant operators and chemists take on the responsibility of producing chemical building blocks that define tomorrow’s pharmaceuticals, agricultural innovations, and specialty ingredients. Among these, 4-Methylthiazole-5-Carboxylic Acid has earned its place as a key intermediate with chemistry that grabs and holds the attention of researchers and formulators alike. In our own production facility, we balance temperature, pressure, and pH hour by hour, batch after batch, to create a consistent product—batch records and lab results guiding our every step.
Years ago, we noticed the rising need for precision heterocyclic building blocks, especially those containing sulfur and nitrogen. Demand didn’t just come from a single industry. Early on, we had inquiries from pharmaceutical teams searching for reliable routes to thiazole-based APIs. Later, specialty materials developers knocked on our door, aiming to introduce sulfur-nitrogen heterocycles into polymers. From our side of the glass, the message was clear: there are few substitutes for genuine 4-Methylthiazole-5-Carboxylic Acid when the structure matters. Some buyers tried to swap with similar thiazole acids, yet after stability tests and analytical reviews, they returned for our precise compound. It rarely pays off to compromise when structure-activity relationships are on the line.
Our version of this acid emerges as a light tan crystalline solid—sometimes with a faint, characteristic odor, sharp to anyone familiar with thiazoles. Melting points land within a tight range because we trust only time-tested purification cycles. Solubility profiles often surprise new customers. Water alone tackles only low levels at ambient temperature, but an organic base or a gentle touch of heat opens new possibilities for processing. Thin-layer chromatography, NMR, and HPLC all affirm a level of purity that removes headaches from downstream purification.
We run our columns and reactors with the product in hand, not just to meet a number, but because complaints about running into “unknowns” or shifting melting points slow down everyone’s day. The difference shows up most when we hand over an analytical COA with each batch—the signatures are real, and every reading links back to our logs.
Anyone involved in heterocyclic chemistry quickly learns that even a minor tweak in a substituent can define product success or failure. Side by side, 4-Methylthiazole-5-Carboxylic Acid stands out against its siblings—such as 2-methyl or unsubstituted versions—by the way it fits into synthesis strategies and by the stability it provides under reaction conditions. From scale-up to pilot batches, our team has handled dozens of related thiazole acids. The methyl group at position 4 defends certain bonds, steers reactivity during coupling, and frequently offers a handle for further functionalization by cross-coupling or amidation.
Synthetic chemists appreciate not having to troubleshoot unexpected side reactions or degradation. We’ve field-tested this compound in Suzuki and Sonogashira couplings and know the difference between a clean reaction and a headache in post-run NMR. If you’ve been cornered by uncooperative raw materials, you understand the relief of a stable, consistent input.
Making 4-Methylthiazole-5-Carboxylic Acid is not just loading a reactor and hoping for the best. Our crew relies on years of method improvement to keep each lot inside strict purity specs. Standard runs come in kilogram lots, but as requests grew, we invested in expanding reactor capacity. For a while, our campaign-style manufacturing cycles struggled to keep pace with custom order surges. After three equipment upgrades, we can supply multi-ton volumes without falling behind, and our analytical team never lets a shipment out without confirming structural integrity.
Across countless projects, customers ask about “the small stuff” that affects real-world outcomes. Tracks of metal contamination—residues from reactor walls or impurer catalysts—can sneak into delicate chemistry downstream. We answer with actual numbers on ICP-MS screens. By minimizing trace impurities, our plant keeps pharmaceutical synthesis teams on track with regulatory filings, and specialty chemical engineers out of troubleshooting mode.
No modern manufacturer can ignore the footprint left behind. Our own journey with 4-Methylthiazole-5-Carboxylic Acid started with more waste and energy consumption than we’d like to remember. Batch after batch, chemists and process engineers pushed for solvent recycling systems. Early solvent choices favored ease over long-term impact. After tightening process windows and switching over to greener reagents, we noticed not only a cleaner effluent but also increased batch consistency.
For us, investing in scrubbers and better catalyst choices minimized both local environmental risk and the hidden costs that show up when disposal costs soar. Our laboratory director keeps a close eye on GHS reporting and maintains contact with regulatory advisors. These choices spring not from pressure, but from daily experience—when you run the plant, you see the benefits of every process improvement first-hand.
Chemists in academic labs often call for gram samples. The difference between a reaction that works in a 50 mL round-bottom flask and one that runs smoothly in a 1000 L reactor is enormous. Exotherms scale faster than most predict. We discovered that subtle tweaks in base addition rates prevented runaway reactions, while overhead cooling matters a lot more in summer than winter. Our process teams consider the exact height at which slurry addition enters a vessel, fine-tuning agitation speeds so that nothing cakes onto the reactor sides. Years of pilot batch mishaps taught these lessons, and every new trainee learns them by shadowing our seasoned operators.
The needs of small-molecule drug development and specialty materials diverge as volume increases. Drug development partners depend on documentation and chain-of-custody to keep regulators satisfied. Each lot report links not only to a production date, but also to a record of calibration maintenance and in-process monitoring. Material suppliers push for low moisture—hydroscopic contamination can ruin physical properties. We train staff to adapt drying processes and monitor final product using proven analytic techniques. These practices evolved from countless honest discussions with buyers who told us exactly where lesser products failed.
We don’t hide the limitations of this acid. Certain reaction partners, especially overly strong oxidizers, create off-products. This reality appears not just in esoteric academic reports, but also in weekly complaints or questions from process engineers. Our team maintains open lines with customer labs, sending replacement samples if analytical profiles don’t line up. Multiple clients’ feedback led us to devise a faster filtration stage and tweak our drying cycles. The result? Variability dropped by half in final product HPLC traces, and fewer headaches for QC chemists at the receiving end.
This ongoing feedback informs our internal standards. Instead of relying solely on published specs, we adapt in real time to what our colleagues in industry request. Analytical data—NMR spectra, HPLC area counts—flow back and forth across the wire, and process tweaks follow close behind. There’s a humility in this process: anyone who pretends a single process stays perfect forever hasn’t spent enough time troubleshooting plant operations.
Pharmaceutical researchers often build heterocyclic scaffolds using this precise compound. Medicinal chemists in our network shared stories of late-stage failures rooted in off-ratio building blocks supplied by traders with questionable provenance. In our own halls, we stress traceability because discovery teams need assurance from early SAR screening to clinical scale. Even small shifts in impurity levels risk knockout results in biological assays. Instead of rumors or hand-waving, we deliver batch data and application notes derived from actual runs—synthesized under our own roof, not rebottled from overseas middlemen.
For polymer researchers, this carboxylic acid introduces new chemical handles that allow direct coupling of thiazole units into larger backbones, lending materials improved thermal or electronic properties. Specialist teams working in OLED development talked us through their solubility headaches—a problem solved with our advice on solvent systems and pH adjustment. The real wins don’t just come from what’s delivered on the drum, but how we guide process integration alongside R&D teams.
We’ve also responded to requests for isotopic labeling and custom-particle size distributions—common needs for those pushing the envelope in mechanistic studies and high-throughput screening. Instead of taking a stock solution off the shelf, our crew discusses every custom project to bring unique requirements to life. Every scientist on our floor knows that a kilogram destined for scale-up demands as much care as a pilot project with a global pharma: there are no shortcuts.
Over recent years, tight export controls and updated hazard classifications reshaped how shipping and documentation take place. Teams in our logistics corner track each change, tailoring shipments and paperwork to the evolving list of international rules. In one notable instance, a customs hold at a major port highlighted a missing SDS update. We went back, retrained our documentation crew, and pushed regular review cycles. The next batch cleared in record time, and fewer client projects missed timelines.
Within regulatory filings, confidence in supply chain sources matters just as much as chemical spec. We back every shipment with archived batch samples and regulatory cross-reference checks. Our force of habit—over-documenting by regular standards—turns into a source of comfort for partners filing with major health authorities. In a field where one failed impurity trace can halt a launch, certainty matters more than bold promises.
Pressure to innovate never pauses. Research teams, particularly those developing complex thiazole derivatives, lean on us for more than a stock answer. Our technical service group isn’t separated from production—they work closely, troubleshooting alongside buyers. Questions about process upsets or new end-use applications reach our on-site chemists, not just a distant helpdesk. We hold regular, informal workshops with key clients, developing technical bulletins in response to live issues with reactivity, solubility, and off-odors. This keeps cycle times down for pilot projects and reduces downtime across the board.
Improvements aren’t just theoretical. A growing partnership with filtration specialists led to a more effective solid-liquid phase separation, which dropped cycle time for a major pharmaceutical client. New batch track-and-trace tools, developed for internal transparency, now let buyers audit their entire supply line, answering questions more quickly and reducing time lost to “where’s my batch” emails.
Disruption has become routine. Delays, shortages, and quality failures from unreliable sources drive more buyers to connect with real producers. Through every market shortage, we kept product flowing by maintaining extra inventory of crucial precursors and never stretching shifts past breaking point. Our commitment comes from years of bruising experiences—every supplier collapse provides another lesson.
Flexible shift schedules and backup vendor relationships mean we can run emergency campaigns when critical intermediates face a run on the market. Our team also monitors broader market signals—if a regulatory change or global supply constraint threatens a key raw material, we preemptively secure reserves. We share these realities with our regular customers. No process is indestructible, but early communication, not last-minute notification, keeps projects afloat in volatile markets.
Anyone can claim to offer 4-Methylthiazole-5-Carboxylic Acid. Fewer back up these claims with an open production history, traceable plant batches, or direct answers to technical questions. We know competitors cut corners—sometimes blending residues, passing off off-spec intermediates, or relabeling stock bought from surplus traders. Every time a buyer chases a discount from a non-producer for this compound, risks multiply: batch-to-batch variation, masking of impurities, or missing spectral data.
Our team takes pride in the clear difference that a straight-from-the-source product offers. Not just in regulatory filings, but in routine benchwork—each batch holds the fingerprint of our controlled workflow, experienced operators, and direct technical support. This difference shows up not just in fewer delayed runs, but also in stronger relationships built on candid, data-driven collaboration.
The future of complex molecule development rides on a handful of reliable building blocks and the steady hands that craft them. Over the years, we’ve stood behind the teams pushing the edges of drug discovery, electronics, and advanced material science, delivering not just a chemical, but peace of mind. In a field where purity, documentation, and technical support make the difference between a breakthrough and a false start, only real manufacturers can guarantee both stability and responsiveness, batch after batch.
Whether your need is an early research batch or a commercial supply chain solution, our approach with 4-Methylthiazole-5-Carboxylic Acid pulls directly from our plant experience and your team’s goals. Each process improvement, each technical upgrade, and each QC check tells the story of a product forged in real-world trials. As we look forward, we welcome every new discussion—no project too small, and no batch too complex. Real results always stem from honest work done together—right from where chemistry and reliability meet.