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α-Naphtholbenzein is used as a pH indicator. (pH 0.0-0.8/ pH 8.2-10.0).
Acid-base indicator: pH 0.0 - 0.8; 8.2 - 10.0.
Wang, J.; Xu, C.; Song, Q. Rapid and Environmentally Friendly Three-Dimensional-Printed Flow Injection Analysis System for the Determination of the Acid Number in Thermal Conductive Oil. Energy Fuels 2015, 29 (2), 1040-1044.
Özçeşmeci, M. Synthesis, photophysical and photochemical properties of metal-free and zinc(II) phthalocyanines bearing alpha-naphtholbenzein units. J. Organomet. Chem. 2014, 767, 16-21.
Hazard Statements: H315-H319-H335
Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Precautionary Statements: P261-P280a-P305+P351+P338-P304+P340-P405-P501a
Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves and eye/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.