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5-Octadecanol

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Identification
Molecular formula
C18H38O
CAS number
20487-53-0
IUPAC name
octadecan-5-ol
State
State

At room temperature, 5-Octadecanol is typically in a solid state. This is due to its relatively high melting point, which leads it to be solid under standard conditions.

Melting point (Celsius)
57.00
Melting point (Kelvin)
330.15
Boiling point (Celsius)
361.00
Boiling point (Kelvin)
634.15
General information
Molecular weight
270.49g/mol
Molar mass
270.4870g/mol
Density
0.8130g/cm3
Appearence

5-Octadecanol appears as a white, waxy solid. It is typically found in the form of needles or flakes and has a faint odor characteristic of long chain alcohols. Its appearance can vary slightly based on the level of purity and the presence of any impurities or additives.

Comment on solubility

Solubility of Octadecan-5-ol

Octadecan-5-ol, also known as 1-octadecanol or simply cetyl alcohol, has unique solubility properties that are noteworthy. This compound is characterized by a long hydrophobic hydrocarbon chain, which significantly affects its solubility in different solvents:

  • Solubility in Water: Octadecan-5-ol is insoluble in water due to the predominance of the non-polar hydrocarbon portion over the polar alcohol group. This highlights the principle of "like dissolves like," where similar polarity leads to better solubility.
  • Solubility in Organic Solvents: Conversely, Octadecan-5-ol is quite soluble in non-polar organic solvents, such as hexane, benzene, and ether. The hydrocarbon tail interacts favorably with these solvents, enhancing solubility.
  • Melts at Higher Temperatures: As a solid at room temperature, it requires heating to reach a temperature where it can dissolve in organic solvents, demonstrating how temperature can influence solubility.

In summary, the solubility characteristics of octadecan-5-ol exemplify the impact of molecular structure on interaction with solvents, where the balance between hydrophilic and hydrophobic parts dictates its solubility behavior in various environments.

Interesting facts

Interesting Facts about Octadecan-5-ol

Octadecan-5-ol, often referred to by its systematic name, is a fascinating compound with unique properties and applications. Here are some intriguing aspects of this fatty alcohol:

  • Structure and Class: Octadecan-5-ol belongs to the class of fatty alcohols, which are characterized by their long hydrocarbon chains. Its structure consists of an 18-carbon chain with a hydroxyl group (-OH) positioned at the fifth carbon, giving it a unique reactivity profile.
  • Natural Occurrence: This compound is a natural component found in various plant oils and animal fats, highlighting its significance in biochemistry and ecology.
  • Applications in Industry: Octadecan-5-ol is used in the production of surfactants, emulsifiers, and stabilizers. It serves as a valuable ingredient in cosmetics and personal care products due to its moisturizing properties.
  • Role in Synthesis: In organic chemistry, octadecan-5-ol serves as an important intermediate for synthesizing other compounds, including fatty acid derivatives and surfactants.
  • Biological Significance: This compound may play a role in various biological processes, including membrane structure and function, making it of interest in membrane biochemistry research.

In summary, octadecan-5-ol is more than just a fatty alcohol; it's a compound with diverse applications and biological significance. Its unique structure and properties provide vast opportunities for further exploration in both scientific and industrial contexts. As you delve deeper into your studies, consider the multifaceted roles of such compounds in our daily lives!

Synonyms
5-octadecanol
HTV990QRZ3
UNII-HTV990QRZ3
79565-94-9
RefChem:103323
octadecan-5-ol
26762-44-7
5-hydroxyoctadecane
UNII-C6BPY2QY39
C6BPY2QY39
SCHEMBL2593772
SCHEMBL7813115
DTXSID70949578
CHEBI:197463
AKOS024274088
ST002866
Q27280099