CAS Registry Number: 90-47-1
CAS Name: 9H-Xanthen-9-one
Additional Names: 9-oxoxanthene; diphenylene ketone oxide; dibenzo-g-pyrone
Molecular Formula: C13H8O2
Molecular Weight: 196.20
Percent Composition: C 79.58%, H 4.11%, O 16.31%
Literature References: Prepd by heating phenyl salicylate: Graebe, Ann. 254, 279 (1889); Holleman, Org. Synth. coll. vol. I (2nd ed., 1941) p 552.
Properties: Polymorphic needles from alcohol, mp 174°. bp730 351°. Sparingly volatile with steam. Dipole moment 3.0. Solubility: 0.55 g/100 ml of cold alcohol; 6.71 g/100 ml of boiling alcohol. Freely sol in chloroform. Slightly sol in hot water, ether, petr ether, benzene, toluene, xylene. Dissolves in concd H2SO4 to a yellow soln with pale blue fluorescence.
Melting point: mp 174°
Boiling point: bp730 351°
Derivative Type: Oxime
Additional Names: Xanthoxime
Properties: mp 161°.
Melting point: mp 161°
Use: In the prepn of xanthydrol. Ovicide for codling moth eggs; less effective as larvicide.