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Methyl red

Chemical compound
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 a pH indicator; it is red in pH under 4.4, yellow in pH over 6.2, and orange in... Wikipedia
Formula: C15H15N3O2
Molar mass: 269.3 g/mol
Density: 791 kg/m³
Solubility: soluble in ethanol
Ph range: 4.4–6.2
3D model (JSmol): Interactive image
Hazard statements: H351, H411