Thermo Scientific Chemicals

Methyl Orange

Catalog number: A17604.22
100 g, Each
Thermo Scientific Chemicals

Methyl Orange

Catalog number: A17604.22
100 g, Each
Quantity
Catalog number: A17604.22
also known as A17604-22
Price (USD)
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Chemical Identifiers

CAS
547-58-0
IUPAC Name
4-{2-[4-(dimethylamino)phenyl]diazen-1-yl}benzene-1-sulfonate
Molecular Formula
C14H14N3O3S
InChI Key
IETWCRRCPURZOC-UHFFFAOYSA-M
SMILES
CN(C)C1=CC=C(C=C1)N=NC1=CC=C(C=C1)S([O-])(=O)=O
Appearance (Color)
Pale orange to dark orange
Solution Test
Passes ACS Test
Visual transition interval
From pH 3.2 (pink/red) to pH 4.4 (yellow/orange)
Form
Crystals or powder or crystalline powder
Solution Test
Soluble in 500 parts water

Description

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

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