Methyl red, also called C.I. Acid Red 2, is an indicator dye that turns red in acidic solutions. It is an azo dye, and is a dark red crystalline powder.
Methyl Red is Shiny purple or red-brown crystalline powder, soluble in ethanol and acetic acid, almost insoluble in water; ethanol solution by the time saved can be played by carboxyl esterification leaving a significant reduction in sensitivity; maximum absorption wavelength of 410nm.
Usage instructions:
Protozoa in vivo staining; acid-base indicator, pH color range 4.4 (red) to 6.2 (yellow); titration of ammonia, a weak organic bases and alkaloids, but does not apply in addition to organic acids other than oxalic acid and picric acid; with bromine cresol green and methylene blue mixed indicator composition to reduce discoloration and improve the color of the field sensitivity; precipitation titration of the adsorbed indicator, such as the fluoride ion with thorium nitrate titration; test free chlorine, chlorite and other oxidants;
AS No. :493 -52-7
Molecular formula: C15H15N3O2
Linear Formula: (CH3) 2NC6H4N = NC6H4CO2H
Molecular Weight: 269.30
Level: Ind
MDL number: MFCD00002425
Beilstein No.: 750,102
EC No. :207 -776-1
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