Carminic Acid Colour / Cochineal Extract Colour

 

CARMINIC ACID COLOUR / COCHINEAL EXTRACT COLOUR
Shade

pH 3.0

pH 4.0

pH 7.0

pH 9.0

orange

orange

red

violet

Acceptable pH Range 2.0 - 9.0
Stability

heat

light

acid

excellent

excellent

excellent

Forms powder, liquid
Solubility water, ethanol, propylene glycol

Carminic Acid

 

Carminic acid (C22H20O13) is a red glucosidal hydroxyanthrapurin that occurs naturally in some scale insects, such as the cochineal and the Polish cochineal. The insects produce the acid as a deterrent to predators. Carminic acid is the colouring agent in carmine. Synonyms are C.I. 75470 and C.I. Natural Red 4.

The chemical structure of carminic acid consists of a core anthraquinone structure linked to a glucose sugar unit. Carminic acid was first synthesized by organic chemists in 1991.

Source, Wikipedia


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