- Carminic acid
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Carminic acid[1] 7-α-D-Glucopyranosyl-9,10-dihydro-
3,5,6,8-tetrahydroxy-1-methyl-9,10-
dioxoanthracenecarboxylic acidOther namesCarminic acid
C.I. Natural Red 4
C.I. 75470Identifiers CAS number 1260-17-9 ChemSpider 14068 UNII CID8Z8N95N KEGG C11254 Jmol-3D images Image 1 - O=C(O)c2c(c3C(=O)c1c(O)c(c(O)c(O)c1C(=O)c3cc2O)[C@H]4O[C@@H]([C@@H](O)[C@H](O)[C@H]4O)CO)C
- InChI=1S/C22H20O13/c1-4-8-5(2-6(24)9(4)22(33)34)13(25)10-11(15(8)27)16(28)12(18(30)17(10)29)21-20(32)19(31)14(26)7(3-23)35-21/h2,7,14,19-21,23-24,26,28-32H,3H2,1H3,(H,33,34)/t7-,14-,19+,20-,21-/m1/s1
Key: DGQLVPJVXFOQEV-NGOCYOHBSA-N
InChI=1/C22H20O13/c1-4-8-5(2-6(24)9(4)22(33)34)13(25)10-11(15(8)27)16(28)12(18(30)17(10)29)21-20(32)19(31)14(26)7(3-23)35-21/h2,7,14,19-21,23-24,26,28-32H,3H2,1H3,(H,33,34)/t7-,14-,19+,20-,21-/m1/s1
Key: DGQLVPJVXFOQEV-NGOCYOHBBS
Properties Molecular formula C22H20O13 Molar mass 492.38 g/mol Density ? g/cm3 Melting point 120 °C (decomp.)
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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
Bond Geometry Glycone Aglycone biochemical families: prot · nucl · carb (glpr, alco, glys) · lipd (fata/i, phld, strd, gllp, eico) · amac/i · ncbs/i · ttpy/iCategories:- Anthraquinone dyes
- Anthraquinone glycosides
- Hydroxyquinols
- Glucosides
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