Docosan

Bezeichnung:Docosan

CAS-Nr629-97-0

Englisch Name:Docosane

CBNumberCB0771076

SummenformelC22H46

Molgewicht310.6

MOL-Datei629-97-0.mol

Synonyma

Docosan

Docosan physikalisch-chemischer Eigenschaften

Schmelzpunkt	42-45 °C(lit.)
Siedepunkt	369 °C(lit.)
Dichte	0.778 g/mL at 25 °C(lit.)
Dampfdichte	10.8 (vs air)
Dampfdruck	<1 mm Hg ( 21.1 °C)
Brechungsindex	1.4455
Flammpunkt	>230 °F
storage temp.	room temp
Löslichkeit	soluble in Benzene,Toluene
Aggregatzustand	Crystalline Solid
Farbe	White
Wichte	0.778
Geruch (Odor)	at 100.00%. waxy
Wasserlöslichkeit	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℃)
Stabilität	Stable. Combustible. Incompatible with strong oxidizing agents.
Kosmetik-Inhaltsstoffe Funktionen	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 Datenbank	629-97-0(CAS DataBase Reference)
EPA chemische Informationen	Docosane (629-97-0)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/37/38
S-Sätze:	26-36
WGK Germany	3
TSCA	TSCA listed
HS Code	29011000
Speicherklasse	11 - Combustible Solids
Giftige Stoffe Daten	629-97-0(Hazardous Substances Data)

Gefahreninformationscode (GHS)

Docosane Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Chemische Eigenschaften
colourless crystalline solid
Verwenden
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].
Allgemeine Beschreibung
Solid. Insoluble in water. Used in organic synthesis, calibration, and temperature sensing equipment.
Air & Water Reaktionen
Insoluble in water.
Reaktivität anzeigen
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.
läuterung methode
Crystallise docosane from EtOH or ether. [Beilstein 1 IV 572.]
Einzelnachweise
[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

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