What is Gardeniablue?

Gardeniablue is a natural food coloring from the fruits of gardenia flowers, obtained through biological fermentation. Gardenia is a Rubiaceae plant native to China. Its flowers are very beautiful and can be used for decoration. 

Gardenia fruit contains three main water-soluble components, namely crocin, flavonoids and iridoids. They are used in the color industry to impart blue and yellow hues, and gardenia pigments can also be used as food colorings. Gardenia colorant has high thermal stability, light and PH value range. When the pH value changes, the colorant will not change its hue.

Gardeniablue is soluble in water, propylene glycol aqueous solution and absolute ethanol, but insoluble in organic solvents. It has excellent heat resistance, weak hygroscopicity, and almost odorless. The pH value of 1% aqueous solution is 4.5+0.5, and the stability and hue of the colorant are not affected by the change of pH. The colorant is not affected by calcium ions or aluminum ions, although its color may be darkened by tin and iron ions.