Carminic acid

Carminic acid
Carminic acid[1]
Identifiers
CAS number 1260-17-9 YesY
ChemSpider 14068 YesY
UNII CID8Z8N95N YesY
KEGG C11254 YesY
Jmol-3D images Image 1
Properties
Molecular formula C22H20O13
Molar mass 492.38 g/mol
Density  ? g/cm3
Melting point

120 °C (decomp.)

 YesY acid (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

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.[2]

References

  1. ^ Merck Index, 11th Edition, 1850.
  2. ^ Allevi, P. et al. (1991). "The 1st Total Synthesis of Carminic Acid". Journal of the Chemical Society-Chemical Communications 18: 1319–1320. 



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Look at other dictionaries:

  • Carminic acid — Carminic Car*min ic, a. Of or pertaining to, or derived from, carmine. [1913 Webster] {Carminic acid}. Same as {Carmine}, 3. [1913 Webster] …   The Collaborative International Dictionary of English

  • carminic acid — noun Etymology: International Scientific Vocabulary carminic + acid : a red crystalline anthraquinone dye C22H20O13 best known as the essential coloring matter of cochineal and used chiefly as a biological stain * * * carminic acid, a purplish… …   Useful english dictionary

  • carminic acid — Carmine Car mine, n. [F. carmin (cf. Sp. carmin, It. carminio), contr. from LL. carmesinus purple color. See {Crimson}.] 1. A rich red or crimson color with a shade of purple. [1913 Webster] 2. A beautiful pigment, or a lake, of this color,… …   The Collaborative International Dictionary of English

  • carminic acid — karmino rūgštis statusas T sritis chemija apibrėžtis Polihidroksiantrachinonkarboksirūgšties junginys su gliukoze. formulė C₂₂H₂₀O₁₃ atitikmenys: angl. carminic acid rus. карминовая кислота …   Chemijos terminų aiškinamasis žodynas

  • carminic acid — A glucoside of an anthracenequinone carboxylic acid; the essential constituent of carmine. * * * car·min·ic acid kär .min ik n a red crystalline anthraquinone dye C22H20O13 best known as the essential coloring matter of cochineal and used chiefly …   Medical dictionary

  • carminic acid — noun a phenolic quinone that is the main constituent of cochineal Syn: carmine, E120 …   Wiktionary

  • carminic — CARMÍNIC adj.m. Acid carminic = acid extras din coşenilă. [< fr. carminique]. Trimis de LauraGellner, 13.09.2007. Sursa: DN  CARMÍNIC adj. acid carminic = acid extras din coşenilă. (< fr. carminique) Trimis de raduborza, 15.09.2007. Sursa …   Dicționar Român

  • Carminic — Car*min ic, a. Of or pertaining to, or derived from, carmine. [1913 Webster] {Carminic acid}. Same as {Carmine}, 3. [1913 Webster] …   The Collaborative International Dictionary of English

  • Carmine — This article is about the pigment. For other uses, see Carmine (disambiguation). Carmine Carmine (  /ˈ …   Wikipedia

  • Cochineal — Female (left) and male (right) Cochineals. Scientific classification Domain: Eukaryota …   Wikipedia

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