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7-α-D-Glucopyranosyl-9,10-dihydro- 3,5,6,8-tetrahydroxy-1-methyl-9,10- dioxoanthracenecarboxylic acid
Carminic acid C.I. Natural Red 4 C.I. 75470
Cc1c(C(O)=O)c(O)cc2C(=O)c3c(O)c (O)c([C@H]4O[C@H](CO)[C@@H](O) [C@H](O)[C@H]4O)c(O)c3C(=O)c12
C 22H 20O 13
? g/cm 3
120 °C (
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references Carminic acid (C 22H 20O 13) is a red glucosidal hydroxyanthapurin that occurs naturally in some scale insects, such as the cochineal and the Polish cochineal. The insects produce the acid as a feeding deterrent. Carminic acid is the colouring agent in carmine. Synonyms are C.I. 75470 and C.I. Natural Red 4.
Additional recommended knowledge
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.
^ Merck Index, 11th Edition, 1850. Allevi, P. et al. 1991. The 1st Total Synthesis of Carminic Acid. ^ Journal of the Chemical Society-Chemical Communications 18:1319-1320.
This article is licensed under the
GNU Free Documentation License. It uses material from the Wikipedia article "Carminic_acid". A list of authors is available in Wikipedia.
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