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Cholesteryl benzoate

CAS No.:604-32-0
Molecular Weight: 490.76000 Molecular Formula: C34H50O2

Description

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. 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.

Basic Info

Chemical Name

Cholesteryl benzoate

Synonyms:

CAS No.:

604-32-0

Molecular Formula:

C34H50O2

Molecular Weight:

490.76000

PSA:

26.30000

LogP:

9.25340

Properties

Appearance:white powder
Density:1.04 g/cm3
Melting Point:149-150ºC
Boiling Point:563.6ºC at 760 mmHg
Storage temp:Store in a cool, dry place. Store in a tightly closed container.
Vapour:
Refractive Index:1.4803 (150ºC)
Flash Point:252.7ºC
Solubility:INSOLUBLE
Stability:Stable under normal temperatures and pressures.

Safety and Handling

Safety Statements:S22-S24/25

WGK Germany:3

NMR Spectrum

Precursor and Product

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