Docosane Chemical Properties

Melting point:

42-45 °C(lit.)

Boiling point:

369 °C(lit.)

Density 

0.778 g/mL at 25 °C(lit.)

vapor density 

10.8 (vs air)

vapor pressure 

<1 mm Hg ( 21.1 °C)

refractive index 

1.4455

Flash point:

>230 °F

storage temp. 

room temp

solubility 

soluble in Benzene,Toluene

form 

Crystalline Solid

color 

White

Specific Gravity

0.778

Odor

at 100.00%. waxy

Water Solubility 

Insoluble in water. Soluble in alcohol.

BRN 

1702206

Henry's Law Constant

5.4×10^-8 mol/(m³Pa) at 25℃, Hilal et al. (2008)

Dielectric constant

2.0（50℃）

Stability:

Stable. Combustible. Incompatible with strong oxidizing agents.

Cosmetics Ingredients Functions

PERFUMING

InChI

1S/C22H46/c1-3-5-7-9-11-13-15-17-19-21-22-20-18-16-14-12-10-8-6-4-2/h3-22H2,1-2H3

InChIKey

HOWGUJZVBDQJKV-UHFFFAOYSA-N

SMILES

CCCCCCCCCCCCCCCCCCCCCC

LogP

11.47 at 25℃

CAS DataBase Reference

629-97-0(CAS DataBase Reference)

EPA Substance Registry System

Docosane (629-97-0)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

WGK Germany 

3

TSCA 

TSCA listed

HS Code 

29011000

Storage Class

11 - Combustible Solids

Hazardous Substances Data

629-97-0(Hazardous Substances Data)

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

Docosane Usage And Synthesis

Chemical Properties

colourless crystalline solid

Uses

It is employed as a perfuming agent in cosmetics industry. It is also used in organic synthesis, calibration, and temperature sensing equipment. Docosane is used to investigate commercially available waxes in the form of thin disc samples as possible diffraction intensity standards for macromolecular crystallography synchrotron beamlines.

Definition

ChEBI: Docosane is a straight-chain alkane with 22 carbon atoms. It has a role as a plant metabolite.

Application

Docosane (C₂₂H₄₆) is a long-chain alkane that can be used as an organic phase-change material for thermal energy storage. Pure docosane has a high latent heat of 256.1 J/g, but its thermal conductivity is relatively low, at only approximately 0.2–0.3 W/(m·K), which limits the rate of heat exchange during the thermal storage process. When combined with sponge-like graphene, both its latent heat (262.8 J/g or 262.2 J/g) and thermal conductivity (0.59 W/(m·K)) are enhanced. This composite material can be utilised in solar thermal energy storage systems as a phase-change thermal storage medium with high energy density and rapid thermal response^[1].

General Description

Solid. Insoluble in water. Used in organic synthesis, calibration, and temperature sensing equipment.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

Saturated aliphatic hydrocarbons, such as N-DOCOSANE, may be incompatible with strong oxidizing agents like nitric acid. Charring of the hydrocarbon may occur followed by ignition of unreacted hydrocarbon and other nearby combustibles. In other settings, aliphatic saturated hydrocarbons are mostly unreactive. They are not affected by aqueous solutions of acids, alkalis, most oxidizing agents, and most reducing agents. When heated sufficiently or when ignited in the presence of air, oxygen or strong oxidizing agents, they burn exothermically to produce carbon dioxide and water.

Purification Methods

Crystallise docosane from EtOH or ether. [Beilstein 1 IV 572.]

References

[1] J.F. Li. (2014). Simultaneous enhancement of latent heat and thermal conductivity of docosane-based phase change material in the presence of spongy graphene. Solar Energy Materials and Solar Cells, 128, Pages 48-51. https://doi.org/10.1016/j.solmat.2014.05.018

Docosane(629-97-0)Related Product Information

• N-HEPTACOSANE
• N-PENTACOSANE
• Heneicosane
• Tricosane
• HEXACOSANOIC ACID
• Hyodeoxycholic acid
• Sodium deoxycholate
• 4-Cholesten-3-one
• OCTACOSANOIC ACID
• Taurodeoxycholic acid sodium salt
• LIGNOCERIC ACID
• 1-HEXACOSANOL
• n-Docosanol
• TRICOSANOIC ACID
• Sodium cholate
• 3',4'-(DIDODECYLOXY)BENZALDEHYDE
• Cholesteryl behenate
• BEHENIC ACID