Third-generation quinolone antibacterial APIs and their intermediates — principally norfloxacin, fleroxacin, gatifloxacin mesylate and pefloxacin mesylate, plus norfloxacin salts for veterinary use and the fine chemicals at the start of the chain.
Do you export outside China?
Yes. The company has held independent import and export rights since January 2000 and ships to more than 30 countries and regions. Write to export@ktpharm.cn with your destination port.
How do I get a certificate of analysis or a specification sheet?
Email the product name and the pharmacopoeia grade you need. We send a representative CoA and the current specification; batch-specific CoAs accompany every shipment.
Which pharmacopoeia grades are available?
Norfloxacin is routinely supplied to USP, CP, EP, IP and JP. Fleroxacin to USP and EP, pefloxacin mesylate to USP and BP, gatifloxacin mesylate to CP. Other grades can be discussed.
Can we audit the plant?
Yes. Customer QA audits and regulatory inspections are hosted regularly. Ask for the plant layout, equipment list and GMP certificates in advance so the visit can be scheduled around production campaigns.
What is the minimum order quantity?
MOQ depends on the product and packing. For development and trial batches smaller quantities can usually be arranged — state the quantity you need in your enquiry.
Batch-by-batch incoming testing does not make your facility audit-proof. Regulators routinely trace quality failures back to supplier controls rather than your own laboratory. The safeguard is pharmaceutical supplier qualification, not the volume of in-house tests you run. The real exposure sits in how you qualify vendors and verify their Certificates of Analysis before materials reach the production line. Why pharmaceutical supplier qualification is what auditors probe first Plenty of quality and procurement teams walk into overseas inspections quietly confident. The main production area, the water system, and the HPLC room look airtight. Raw materials and packaging arrive, get tested lot by lot, and pass before release. Surely no inspector can follow that trail all the way back to a supplier’s plant. That assumption underrates how far an FDA, PMDA, or EU auditor will dig. After four FDA on-site inspections plus PMDA, EU, and multiple multinational audits, the pattern is consistent. S...
Pharmaceutical material management controls how raw materials, excipients, packaging and biological substrates are received, tested, stored and released from R&D to commercial manufacture. It ties quality standards, supplier qualification, warehouse environmental control and retention obligations into one traceable framework. Plain and operational. Every lot that enters a product must be accounted for, with status, result and decision recorded at each step. Background and problem Pharmaceutical material management starts before the drug substance is made. It starts with the material. A finished batch is only as good as the materials that went into it. Regulators treat pharmaceutical material control as a core GMP obligation. When material management is weak, the consequences surface downstream: failed release tests, stability drift, product recalls, and warning letters from the national drug regulator. The difficulty is not one rule. It is the number of interfaces. A material moves...
Mutant prevention concentration is the drug level that blocks growth of first-step resistant mutants. Its distance from the MIC sets the width of the mutant selection window. Across a 100-isolate Gram-negative panel, median MPC/MIC ratios ran from 4 to 16 depending on the molecule. That spread has direct consequences for how a fluoroquinolone such as norfloxacin gets dosed. The numbers below come from a hospital isolate collection and are used here only as class-level read-across. The pharmacology of the selection window does not change with the host species. What changes is the achievable exposure, and that is where a veterinary formulator or a prescribing veterinarian has to do the arithmetic. Why the selection window matters more than the MIC Routine susceptibility testing reports one number: the MIC, the lowest concentration that stops visible growth of the bulk population. That number describes the majority. It says nothing about the small subpopulation already carrying a first-st...
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