1-octadecanol

Structural formula
General
Surname	1-octadecanol
other names	Cetanol; Stearyl alcohol; Octadecan-1-ol; STEARYL ALCOHOL ( INCI ) ; Lanette 18th;
Molecular formula	C 18 H 38 O
Brief description	white scales with a faint odor
External identifiers / databases
EC number	204-017-6
ECHA InfoCard	100.003.652
PubChem	8221
Wikidata	Q632384
properties
Molar mass	270.49 g mol −1
Physical state	firmly
density	0.83 g cm −3
Melting point	59 ° C
boiling point	336 ° C
Vapor pressure	1.33 h Pa (at 150.3 ° C )
solubility	almost insoluble in water: <0.01 g · l −1 ; soluble in ethanol , acetone , diethyl ether , chloroform , benzene ;
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	no GHS pictograms
H and P phrases	H: no H-phrases
	P: no P-phrases
Toxicological data	> 20,000 mg kg −1 ( LD 50 , rat , oral )
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

1-Octadecanol (often also stearyl alcohol ) is a long-chain, monohydric alcohol that belongs to the group of fatty alcohols . Due to its low polarity , in contrast to the short-chain alcohols, it is no longer soluble in water, but is soluble in numerous non-polar solvents .

presentation

The starting material is stearic acid , obtained from fats and fatty oils . The alcohol is produced using alkyl esters (stearates) by hydrogenation .

1-Octadecanol is one of the chemical substances that are produced in large quantities (" High Production Volume Chemical ", HPVC) and for which the Organization for Economic Cooperation and Development (OECD) collects data on possible hazards (" Screening Information Dataset ") , SIDS).

properties

The compound has a flash point of approx. 185 ° C and an ignition temperature of 450 ° C.

INCI -compliant indication of the ingredients (including stearyl alcohol = stearyl alcohol) of a cosmetic on the bottom of the back of the pack.

use

1-Octadecanol belongs to the group of nonionic surfactants that stabilize water-in-oil emulsions (also known as W / O emulsions for short ). Because of its relatively weak surfactant effect, it is mostly used in combination with other surfactants , mostly with cetyl alcohol (so-called cetyl stearyl alcohol ). 1-Octadecanol is often used as an ointment base in cosmetic articles .

It is also used in the production of fatty alcohol sulfates ( surfactants ) and as a lubricant in the metal and textile industries.

Individual evidence

↑ Entry on STEARYL ALCOHOL in the CosIng database of the EU Commission, accessed on December 28, 2019.
↑ ^a ^b ^c ^d ^e ^f Entry on 1-octadecanol in the GESTIS substance database of the IFA , accessed on September 8, 2014(JavaScript required) .
↑ ^a ^b ^c ^d OECD : Screening Information Dataset (SIDS) Initial Assessment Report (SIAR) for 1-octadecanol , accessed on October 3, 2014.
↑ Data sheet 1-octadecanol (PDF) at EDQM , accessed on February 17, 2011.
↑ Austrian Chamber of Pharmacists: Miscibility of ointment bases with selected active ingredients

[CosIng-1] Entry on STEARYL ALCOHOL in the CosIng database of the EU Commission, accessed on December 28, 2019.

[GESTIS-2] ↑ ^a ^b ^c ^d ^e ^f Entry on 1-octadecanol in the GESTIS substance database of the IFA , accessed on September 8, 2014(JavaScript required) .

[SIDS-3] OECD : Screening Information Dataset (SIDS) Initial Assessment Report (SIAR) for 1-octadecanol , accessed on October 3, 2014.

[EDQM-4] Data sheet 1-octadecanol (PDF) at EDQM , accessed on February 17, 2011.

[Apothekerkammer-5] Austrian Chamber of Pharmacists: Miscibility of ointment bases with selected active ingredients