Chrysoine resorcinol
Encyclopedia
Chrysoine resorcinol is a synthetic azo dye which was formerly used as a food additive
. In Europe, it was banned as a food additive in 1984. In the US, it was banned in 1988.
Chrysoine resorcinol can be used as a pH indicator
with a color change between pH 11 and pH 12.7.
In colorimetry
it has an absorption maximum of 387 nm
.
Food additive
Food additives are substances added to food to preserve flavor or enhance its taste and appearance.Some additives have been used for centuries; for example, preserving food by pickling , salting, as with bacon, preserving sweets or using sulfur dioxide as in some wines...
. In Europe, it was banned as a food additive in 1984. In the US, it was banned in 1988.
Chrysoine resorcinol can be used as a pH indicator
PH indicator
A pH indicator is a halochromic chemical compound that is added in small amounts to a solution so that the pH of the solution can be determined visually. Hence a pH indicator is a chemical detector for hydronium ions or hydrogen ions in the Arrhenius model. Normally, the indicator causes the...
with a color change between pH 11 and pH 12.7.
In colorimetry
Colorimetry
Colorimetry is "the science and technology used to quantify and describe physically the human color perception."It is similar to spectrophotometry, but is distinguished by its interest in reducing spectra to the physical correlates of color perception, most often the CIE 1931 XYZ color space...
it has an absorption maximum of 387 nm
Nanometre
A nanometre is a unit of length in the metric system, equal to one billionth of a metre. The name combines the SI prefix nano- with the parent unit name metre .The nanometre is often used to express dimensions on the atomic scale: the diameter...
.