At Dextrose Technologies Pvt. Ltd., we provide Preservative & Biocidal Efficacy Testing to help validate how well preservatives, disinfectants, and antimicrobial formulations control microbial growth under defined test conditions. These studies support product development, comparative screening, and quality investigations with clear documentation and actionable reporting. Preservative Efficacy Testing (PET / Challenge Test) We perform preservative challenge testing to assess whether a formulation can inhibit or reduce microbial growth over time. Testing is executed using defined organisms/timepoints as per the agreed scope, and results are reported as microbial counts/log reduction trends to support performance evaluation. Disinfectant and Biocide Efficacy Studies We evaluate disinfectants/biocides for microbial reduction under controlled contact time and concentration conditions. Studies can be designed for screening or comparative benchmarking based on your intended use case. Antimicrobial Screening of Formulations We screen formulations to compare antimicrobial performance across versions, preservative systems, or concentration ranges—helping you select the best candidate before larger validation studies. Deliverables * Study plan summary (organisms, inoculum approach, contact time, and timepoints as applicable) * Microbial count results (CFU) and log reduction trends * Interpretation notes and clear pass/fail-style conclusions where applicable to the protocol * Contamination controls and observation notes Get started Share your product type (cosmetic/personal care/pharma/industrial), preservative system, target organisms (if specified), and testing standard or expectation. We’ll recommend the right test design and reporting format.