rosolic acid, CAS No. 603-45-2

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603-45-2

Catalog No. EBD2204646

CAS 603-45-2

Name rosolic acid

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Basic Information

Synonyms: 4-(4,4'-Dihydroxy-benzhydryliden)-cyclohexa-2,5-dienon rosolicacid Aurin C.I.43800 4-[bis(4-hydroxyphenyl)methylidene]cyclohexa-2,5-dien-1-one p-rosolicacid

Molecular Formula: C19H14O3

Molecular Weight: 290.31

MDL Number: MFCD00001624

Categories: Materials Chemistry > Optoelectronic and Organic Semiconductor Materials > Dye Precursors Synthetic Chemistry > Organic Building Blocks > Phenols and Ethers

Product Description:

Aurin, also known as Rosolic acid or 4-[Bis(4-hydroxyphenyl)methylene]-2,5-cyclohexadien-1-one, is a triphenylmethane dye derivative. It exists as a dark red to brown powder or crystalline solid and is sparingly soluble in water but soluble in alcohols and alkaline solutions. Its primary industrial application is as a key intermediate in the synthesis of various triphenylmethane dyes and pigments. These dyes are widely used in the textile, paper, and leather industries for coloring purposes. Furthermore, aurin serves as a pH indicator, changing color from yellow (acidic) to red (alkaline) around pH 6.8-8.2, which finds use in analytical chemistry and laboratory settings. Beyond its role as a dye precursor and indicator, aurin has been investigated in materials science research, particularly in the development of organic semiconductors and photoelectronic materials due to its conjugated π-electron system. It also finds niche applications as a biological stain in microscopy.

Physical Properties

Boiling Point: 543 °C at 760 mmHg

Flash Point: 296.2 °C

Density: 1.315 g/cm3

Analytical Data

Appearance: red crystals or powder