Microbial Limit Test

Microbial Limit Test (MLT) is a core mandatory microbiological quality control procedure for the full lifecycle safety evaluation of non-sterile pharmaceuticals, serving as a critical firewall to block microbial risks in clinical medication. Unlike sterility tests that require zero viable microorganisms, MLT scientifically quantifies the total microbial load of products and strictly screens for objectionable pathogenic bacteria, effectively avoiding adverse reactions such as skin irritation, gastrointestinal infections and secondary inflammation caused by excessive microbial contamination or hidden pathogens in non-sterile preparations. Compliant with the unified standards of ChP, USP & EP global pharmacopeias, this test is a compulsory batch release inspection item for pharmaceutical finished products, raw materials and auxiliary materials. It standardizes microbial control indicators, eliminates hidden quality hazards in advance, stabilizes batch-to-batch product consistency, and helps enterprises smoothly pass GMP on-site inspections, drug registration filings and cross-border market access audits, fully protecting end-user medication safety and corporate brand credibility.

PharmaAnalytica's standardized MLT services cover all mainstream non-sterile pharmaceutical scenarios and full-compliance detection indicators, matching multi-scenario industrial testing demands. The applicable scope fully covers oral solid preparations such as tablets, capsules and granules, oral liquid preparations including syrups and oral solutions, all conventional topical preparations like ointments, creams, gels and lotions, as well as general pharmaceutical functional excipients.

Our core testing items include Total Aerobic Microbial Count (TAMC), Total Yeast and Mold Count (TYMC), and targeted detection of specified objectionable microorganisms, including Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa and Salmonella, tailored to different dosage form usage routes. We strictly adopt three pharmacopeia-authorized standard testing methods:

• Membrane filtration method for samples with antibacterial activity and low microbial load;
• Plate pouring method for routine microbial enumeration;
• Surface spreading method for slow-growing molds and yeasts.

PharmaAnalytica's Technology Platform

PharmaAnalytica's Microbial Limit Test

As a professional testing brand under STEMart, PharmaAnalytica delivers standardized, compliant, and efficient one-stop Microbial Limit Test solutions, with solid core service advantages to support pharmaceutical enterprises' GMP compliance and product batch release.

Professional Microbiological Technical Team

Our core inspectors are certified pharmaceutical microbiology professionals, with long-term practical experience in USP, EP multi-pharmacopeia interpretation and standardized GLP/GMP laboratory operations. We can efficiently cope with testing difficulties of high-viscosity and antimicrobial complex pharmaceutical samples, avoiding operational deviation affecting test results.

Rigorous Method Suitability Testing

Before every batch of MLT tests, we carry out mandatory independent method suitability tests for different dosage form matrices. We scientifically match neutralizers and optimized filtration processes to completely neutralize the antibacterial and bacteriostatic interference of raw materials and special formulations, ensuring all microbial counting and pathogen detection data are true, valid and pharmacopeia-compliant.

Standardized Data Management & Traceable Reports

We realize automatic data collection, real-time audit trail recording and electronic signature locking throughout the whole testing process. All original data, colony imaging and strain identification records are permanently archived. We issue bilingual standardized official reports that fully meet domestic drug registration, factory inspection and cross-border market filing audit requirements.

Customized Flexible Personalized Testing Services

We tailor exclusive MLT testing schemes according to customer product attributes, production batches and emergency progress demands. We flexibly adjust sample homogenization pretreatment, filtration enrichment methods and testing cycles, provide one-stop pre-test consultation, real-time progress feedback and after-test technical inquiry supporting services, greatly saving customers' compliance time cost.

Choose PharmaAnalytica under STEMart for reliable, compliant, and cost-effective microbial limit testing, and streamline your pharmaceutical quality control and regulatory submission processes with confidence.