GSP Chem supplies high-purity Bromothymol Blue (CAS 76-59-5) for accurate pH testing, photosynthesis studies, enzyme activity monitoring, and lab microscopy. Dye content >95%, transition range pH 5.8–7.6 (yellow to blue). Meets Merck and Sigma-Aldrich global benchmarks. Bulk stock available above 2500 kg. Free pre-shipment samples provided.