Title: d-Carotene
CAS Registry Number: 472-92-4
CAS Name: e,y-Carotene
Molecular Formula: C40H56
Molecular Weight: 536.87
Percent Composition: C 89.49%, H 10.51%
Literature References: Extracted from the fruit of Gonocaryum pyriforme Mig., Icacinaceae: Winterstein, Z. Physiol. Chem. 219, 249 (1933). Occurs also in carrots and certain varieties of tomatoes. Isoln from tomato mutants: Porter, Murphey, Arch. Biochem. Biophys. 32, 21 (1951). Structure: Kargl, Quackenbush, ibid. 88, 59 (1960). Synthesis: Manchand et al., J. Chem. Soc. 1965, 2019. Absolute configuration: Buchecker, Eugster, Helv. Chim. Acta 54, 327 (1971).
Properties: Long orange-red needles from CS2 + hexane + ethanol, mp 140.5°. [a]Cd +317°; [a]D25 +352° ±16% (hexane). Absorption spectrum: Kargl, Quackenbush, loc. cit.
Melting point: mp 140.5°
Optical Rotation: [a]Cd +317°; [a]D25 +352° ±16% (hexane)
Deltamethrin delta-Tocopherol Demanyl Phosphate Demecarium Bromide Demeclocycline

Skeletal formula
Space-filling model
CAS number 472-92-4
PubChem 5281230
ChemSpider 4444642
Jmol-3D images Image 1
Molecular formula C40H56
Molar mass 536.873
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

δ-Carotene or ε,ψ-carotene is a form of carotene with an ε-ring at one end, and the other uncyclized. It is an intermediate synthesis product in some photosynthetic plants between lycopene and α-carotene (β,ε-carotene) or ε-carotene (ε,ε-carotene).[1] δ-Carotene is fat soluble.