Methyl Orange

CAS: 547-58-0 | C14H14N3NaO3S | 327.334 g/mol

Catalog Number	Quantity
ALFA17604.22	100 g

Catalog number ALFA17604.22

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Quantity:

100 g

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Specifications

Chemical Name or MaterialMethyl Orange

Melting Point>300°C

CAS547-58-0

Health Hazard 1Danger

Health Hazard 2GHS H Statement
H301
Toxic if swallowed.

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.