Calconcarboxylic acidCalconcarboxylic acid (IUPAC name 3-hydroxy-4-[(2-hydroxy-4-sulfonaphthalen-1-yl)diazenyl]naphthalene-2-carboxylic acid; commonly called Patton and Reeder's Indicator) is an azo dye that is used as an indicator for complexometric titrations of calcium with ethylenediaminetetraacetic acid (EDTA) in the presence of… Read from the Chembox of the Wikipedia article Calconcarboxylic acid, revision 1380080389.

Property

Value

Formula

C21H14N2O7S, 438.42 g/mol

Melting point

300 °C

Density

1.6 g/cm³

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