Methyl Yellow used as a pH indicator. It is an acid-base indicator that changes color from below pH 2.9 red to above pH 4.0 yellow and vice versa. Typical use is in the titration of a weak base with a strong acid.
Makoto Nagase.; Yasuhiko Osaki.; Takahiko Matsueda. Determination of methyl yellow, sudan I and sudan II in water by high-performance liquid chromatography. Journal of Chromatography A. 1989, 465 (3), 434-437.
Ross R. Weikel.; Jason P. Hallett.; Charles L. Liotta.; Charles A. Eckert. Self-Neutralizing in Situ Acid Catalysis for Single-Pot Synthesis of Iodobenzene and Methyl Yellow in CO2-Expanded Methanol. Ind. Eng. Chem. Res. 2007, 46 (16), 5252-5257.
Hazard Statements: H301-H351
Toxic if swallowed. Suspected of causing cancer.
Precautionary Statements: P201-P280-P301+P310a-P308+P313-P405-P501a
Obtain special instructions before use. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Immediately call a POISON CENTER/doctor IF exposed or concerned: Get medical advice/attention. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.