From concept to demonstration, this video explores HEPES (CAS 7365-45-9) Molecular Biology Grade Free Acid 99.5% — showing how this zwitterionic buffer performs in cell culture and biological research. Watch a step-by-step walkthrough of its pH buffering range (6.8–8.2), preparation into clear 1M solutions, and practical lab demonstrations that reveal why HEPES is a go-to buffer for maintaining physiological pH in air-exposed media. Ideal for B2B buyers and lab professionals seeking real use insights, handling tips, and visual proof of performance.