Synthesis chemical lab is one of the best and leading supplier of chemical wholesale and retail traders. We are leading supplier of chemicals speciality chemicals. Synthesis chemical lab are the supplier of 1-Naphthol benzein - synthesis chemical lab. 1-naphtholbenzein, also known as alpha-naphthol benzein, is a dye used as a pH indicator and in other applications: pH indicator 1-naphtholbenzein is used to indicate pH levels between 8.2 and 10.0. It's often used in acid-base titrations. For example, a 0.2% solution of 1-naphtholbenzein in glacial acetic acid will change from brownish yellow to green when 0.1M perchloric acid is added. Naphthol is made of two aromatic compounds. It has 10 carbon atoms, 8 hydrogen atoms, and one oxygen atom. The carbon and hydrogen atoms in naphthol form its two benzene rings. A hydroxyl functional group (OH) is attached to one of the benzene rings and is made of one oxygen atom and one hydrogen atom. 1-Naphthol is a precursor to a variety of insecticides including carbaryl and pharmaceuticals including nadolol as well as for the antidepressant sertraline and the anti-protozoan therapeutic atovaquone. Synthesis Chemical lab is a one stop solution for your all kind of chemical needs.- Synthesis Chemical Lab.