Methyl Yellow, indicator

CAS: 60-11-7 | C14H15N3 | 225.30 g/mol

Catalog Number	Quantity
ALFB21145.14	25 g

Catalog number ALFB21145.14

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Chemical Identifiers

CAS105-39-5

IUPAC Nameethyl 2-chloroacetate

Molecular FormulaC4H7ClO2

InChI KeyVEUUMBGHMNQHGO-UHFFFAOYSA-N

SMILESCCOC(=O)CCl

Specifications

Infrared spectrumConforms

Refractive index1.4200 to 1.4220 (20°C, 589 nm)

Appearance (Color)Clear colorless

GC>=98.5 %

Appearance (Form)Liquid

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.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications
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.

Solubility
Insoluble in water. Soluble in alcohol.

Notes
Transition interval: pH 2.9 (red) to pH 4.0 (yellow)

RUO – Research Use Only

General References:

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.