Methyl Orange

Catalog Number	Quantity
ALFA17604.22	100 g

Catalog number ALFA17604.22

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100 g

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Chemical Identifiers

CAS60456-26-0

IUPAC Name[(2R)-oxiran-2-yl]methyl butanoate

Molecular FormulaC7H12O3

InChI KeyYLNSNVGRSIOCEU-ZCFIWIBFSA-N

SMILESCCCC(=O)OC[C@H]1CO1

Specifications

Appearance (Color)Clear colorless

Assay (GC)≥97.5%

FormLiquid

Refractive Index1.4260-1.4300 @ 20?C

Optical Rotation-32? ± 1.0? (neat)

Methyl Orange is a pH indicator used in titrations for acids. It is also used for histological microscopy. Further, it is used as counter stain to crystal violet in staining pollen tubes.

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 Orange is a pH indicator used in titrations for acids. It is also used for histological microscopy. Further, it is used as counter stain to crystal violet in staining pollen tubes.

Solubility
Soluble in ethanol. Partially soluble in hot water. Slightly soluble in cold water and pyrimidine. Insoluble in ether and alcohol.

Notes
Incompatible with strong oxidizing agents.

RUO – Research Use Only

General References:

Acid-base indicator: pH 3.2 - 4.4.
Gomez-Solís, C.; Ballesteros, J. C.; Torres-Martínez, L. M.; Juárez-Ramírez, I.; Torres, L. A. D.; Zarazua-Morin, M. E.; Lee, S. W. Rapid synthesis of ZnO nano-corncobs from Nital solution and its application in the photodegradation of methyl orange. J. Photochem. Photobiol., A 2015, 298, 49-54.
Varga, M.; Kopecká, J.; Morávková, Z.; Křivka, I.; Trchová, M.; Stejskal, J.; Prokeš, J. Effect of oxidant on electronic transport in polypyrrole nanotubes synthesized in the presence of methyl orange. J. Polym. Sci., Part B: Polym. Phys. 2015, 53 (16), 1147-1159.