Cholesteryl benzoate

Cholesteryl benzoate
Identifiers
CAS number	604-32-0
PubChem	2723613
ChemSpider	2005815 Y
Jmol-3D images	Image 1 Image 2
SMILES C[C@H](CCCC(C)C) [C@H]4CC[C@@]3 ([H])[C@]2([H]) CC=C1C[C@@H] (OC(c5ccccc5)=O) CC[C@@](C)1[C@] ([H])2CC[C@@]34C O=C(O[C@@H]4C/C3=C/C[C@@H]1[C@H](CC[C@]2([C@H]1CC[C@@H]2[C@H](C)CCCC(C)C)C)[C@@]3(C)CC4)c5ccccc5
InChI InChI=1S/C34H50O2/c1-23(2)10-9-11-24(3)29-16-17-30-28-15-14-26-22-27(36-32(35)25-12-7-6-8-13-25)18-20-33(26,4)31(28)19-21-34(29,30)5/h6-8,12-14,23-24,27-31H,9-11,15-22H2,1-5H3/t24-,27+,28+,29-,30+,31+,33+,34-/m1/s1 Y Key: UVZUFUGNHDDLRQ-LLHZKFLPSA-N Y InChI=1/C34H50O2/c1-23(2)10-9-11-24(3)29-16-17-30-28-15-14-26-22-27(36-32(35)25-12-7-6-8-13-25)18-20-33(26,4)31(28)19-21-34(29,30)5/h6-8,12-14,23-24,27-31H,9-11,15-22H2,1-5H3/t24-,27+,28+,29-,30+,31+,33+,34-/m1/s1 Key: UVZUFUGNHDDLRQ-LLHZKFLPBM
Properties
Molecular formula	C34H50O2
Molar mass	490.76 g/mol
Melting point	149-150 °C
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Cholesteryl benzoate, also called 5-cholesten-3-yl benzoate, is an organic chemical, an ester of cholesterol and benzoic acid. It is a liquid crystal material forming cholesteric liquid crystals with helical structure.

It can be used with cholesteryl nonanoate and cholesteryl oleyl carbonate in some thermochromic liquid crystals.

It is used in some hair colors, make-ups, and some other cosmetic preparations.^[1]

It can be also used as a component of the liquid crystals used for liquid crystal displays.

Cholesteryl benzoate was the first material in which liquid crystal properties were discovered. In the late 1880s Friedrich Reinitzer, an Austrian botanist, while studying the chemicals in plants, heated cholesteryl benzoate. At 145 °C the material melted, yielding a cloudy fluid, which changed to the originally expected clear liquid at 178.5 °C. In 1888, the German physicist Otto Lehmann concluded the cloudy fluid presents a new phase of matter, and coined the term liquid crystal.

References

1. ^ Record in the Household Products Database of NLM