Title: Karanjin
CAS Registry Number: 521-88-0
CAS Name: 3-Methoxy-2-phenyl-4H-furo[2,3-h]-1-benzopyran-4-one
Molecular Formula: C18H12O4
Molecular Weight: 292.29
Percent Composition: C 73.97%, H 4.14%, O 21.90%
Literature References: From Pongamia glabra Vent., Leguminosae: Beal, Katti, J. Am. Pharm. Assoc. 14, 1086 (1925); Rao, Rao, J. Indian Chem. Soc. 17, 526 (1940); Bhat et al., J. Am. Oil Chem. Soc. 33, 197 (1956). Structure: Limaye, Rasayanam 1, 1 (1936), C.A. 31, 22069 (1937); Manjunath et al., Ber. 72B, 39 (1939). Synthesis: Seshadri, Venkateswarlu, Proc. Indian Acad. Sci. 13A, 404 (1941); 17A, 16 (1943); Kawase et al., Bull. Chem. Soc. Jpn. 28, 273 (1955); Rao, Seshadri, Proc. Indian Acad. Sci. 33A, 168 (1951); Aneja et al., Tetrahedron 2, 203 (1958); Raizada et al., J. Sci. Ind. Res. 19B, 76 (1960).
Properties: Needles from methanol, mp 157-158°. Sol in methanol, ethanol, chloroform, benzene, ether, concd H2SO4, HNO3, HOAc, HCl; practically insol in petr ether, dil mineral acids.
Melting point: mp 157-158°
Karaya Gum Karsil Kava Kawain Kebuzone

Chemical structure of karanjin
CAS number 521-88-0 N=
PubChem 100633
ChemSpider 90925 YesY
Jmol-3D images Image 1
Molecular formula C18H12O4
Molar mass 292.29 g/mol
 N (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Karanjin, a furanoflavonol, a type of flavonoid. It is obtained from the seeds of the karanja tree (Millettia pinnata, aka Pongamia glabra Vent.), a tree growing wild in south India. Karanjin is an acaricide and insecticide. Acaricide means a product that is used to kill mites (Acarina). Karanjin is used as bio pesticide / bio insecticide and is reported to have nitrification inhibitory properties.[1]