Laccaic acid

Laccaic acid A
Names
	IUPAC name 7-[5-(2-acetamidoethyl)-2-hydroxyphenyl]-3,5,6,8-tetrahydroxy-9,10-dioxoanthracene-1,2-dicarboxylic acid
	Other names Red lac, Shellac, Lac dye
Identifiers
CAS Number	15979-35-8;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:90186;
ChemSpider	4590519;
PubChem CID	5491415;
	InChI InChI=1S/C26H19NO12/c1-8(28)27-5-4-9-2-3-12(29)10(6-9)15-22(33)19-18(24(35)23(15)34)20(31)11-7-13(30)16(25(36)37)17(26(38)39)14(11)21(19)32/h2-3,6-7,29-30,33-35H,4-5H2,1H3,(H,27,28)(H,36,37)(H,38,39);
	SMILES CC(=O)NCCC1=CC(=C(C=C1)O)C2=C(C3=C(C(=C2O)O)C(=O)C4=CC(=C(C(=C4C3=O)C(=O)O)C(=O)O)O)O;
Properties
Chemical formula	C26H19NO12
Molar mass	537.44 g·mol−1
Density	1.7±0.1 g.cm3
Vapor pressure	0.0±0.3 mmHg at 25°C
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Laccaic acids or laccainic acids are a group of five anthraquinone derivatives, designated A through E, which are components of the red shellac obtained from the insect Kerria lacca, similar to carminic acid and kermesic acid. This article focuses primarily on laccaic acid A (LCA).