Arachidyl alcohol, also 1-icosanol, is a waxy substance used as an emollient in cosmetics. It is a straight-chain fatty alcohol with 20 carbon atoms, typically obtained via the hydrogenation of arachidic acid or arachidonic acid, both of which are present in peanut oil. Its name is derived from that of the peanut plant (Latin: arachis).

Arachidyl alcohol

Names
Preferred IUPAC name Icosan-1-ol[1]
Other names Arachidalcohol Arachidic alcohol Hydroxyicosane Icosalcohol Icosanol 1-Icosanol n-Icosanol Icosyl alcohol Icosyl hydrate Icosylic alcohol Nonadecylcarbinol 1-Eicosanol
Identifiers
CAS Number	629-96-9 Y
3D model (JSmol)	Interactive image Interactive image
Beilstein Reference	1705104
ChEBI	CHEBI:75627 N
ChEMBL	ChEMBL451717 Y
ChemSpider	11898 Y
ECHA InfoCard	100.010.110
EC Number	211-119-4
PubChem CID	12404
UNII	1QR1QRA9BU Y
CompTox Dashboard (EPA)	DTXSID0027272
InChI InChI=1S/C20H42O/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21/h21H,2-20H2,1H3 Y Key: BTFJIXJJCSYFAL-UHFFFAOYSA-N Y InChI=1/C20H42O/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21/h21H,2-20H2,1H3 Key: BTFJIXJJCSYFAL-UHFFFAOYAC
SMILES CCCCCCCCCCCCCCCCCCCCO OCCCCCCCCCCCCCCCCCCCC
Properties
Chemical formula	C20H42O
Molar mass	298.555 g·mol−1
Appearance	White, translucent crystals
Melting point	64 °C (147 °F; 337 K)
Boiling point	372 °C (702 °F; 645 K)
Solubility in water	1.51 × 10−6 g dm−3
log P	8.99
Vapor pressure	<0.01 kPa (at 20 °C)
Hazards
Flash point	195 °C (383 °F; 468 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references