Dodécan-1-ol

Dodécan-1-ol
Image illustrative de l’article Dodécan-1-ol
Image illustrative de l’article Dodécan-1-ol
Identification
Nom UICPA dodécan-1-ol
Synonymes

dodécanol
1-dodécanol
alcool dodécylique
alcool laurylique

No CAS 112-53-8
No ECHA 100.003.620
No CE 203-982-0
No RTECS JR5775000
PubChem 8193
SMILES
InChI
Apparence solide blanc à l'odeur caractéristique
Propriétés chimiques
Formule C12H26O  [Isomères]
Masse molaire[1] 186,334 2 ± 0,011 7 g/mol
C 77,35 %, H 14,06 %, O 8,59 %,
Propriétés physiques
fusion 24 °C[2]
ébullition 261 °C[2]
Solubilité 0,004 g·l-1 (eau, 25 °C)[2]
Paramètre de solubilité δ 16,6 MPa1/2 (25 °C)[3];

20,6 J1/2·cm-3/2 (25 °C)[4]

Masse volumique 0,83 g·cm-3[2]
d'auto-inflammation 250 °C[2]
Point d’éclair 121 °C[2]
Limites d’explosivité dans l’air 0,5 vol. % - 39 g/m3[2]
Pression de vapeur saturante 0,016 9 mbar (30 °C)
0,037 7 mbar (40 °C)
0,079 9 mbar (530 °C)[2]
Propriétés optiques
Indice de réfraction  1,443 0[5]
Précautions
SGH[2]
H315, H319, H335, H410, P261, P273, P305+P351+P338 et P501
Transport[2]
   3077   
Écotoxicologie
DL50 >12 800 mg·kg-1 (rat, oral)[6]
LogP 5,13[2]

Unités du SI et CNTP, sauf indication contraire.

Le dodécan-1-ol, aussi couramment appelé simplement dodécanol ou sous les noms triviaux d'alcool dodécylique, alcool laurylique ou alcool laurique est un alcool gras. C'est un solide blanc à incolore, insoluble dans l'eau avec une odeur florale.

Utilisation

Le dodécan-1-ol est utilisé dans des tensioactifs, des huiles lubrifiantes et dans certains médicaments.

En cosmétique, il est utilisé comme crème hydratante.

Toxicité

Le dodécan-1-ol est un irritant cutané léger. Il est moitié moins toxique que l'éthanol, mais est particulièrement néfaste aux organismes marins[7].


Notes et références

  1. Masse molaire calculée d’après « Atomic weights of the elements 2007 », sur www.chem.qmul.ac.uk.
  2. a b c d e f g h i j k et l Entrée « 1-Dodecanol » dans la base de données de produits chimiques GESTIS de la IFA (organisme allemand responsable de la sécurité et de la santé au travail) (allemand, anglais), accès le 23 novembre 2011 (JavaScript nécessaire)
  3. (en) James E. Mark, Physical Properties of Polymer Handbook, Springer, , 2e éd., 1076 p. (ISBN 978-0-387-69002-5 et 0-387-69002-6, lire en ligne), p. 294
  4. (en) Yitzhak Marcus, The Properties of Solvents, vol. 4, England, John Wiley & Sons Ltd, , 239 p. (ISBN 0-471-98369-1)
  5. a et b Fiche Alfa Aesar, consultée le 23 novembre 2011
  6. Medizin und Ernaehrung. Vol. 8, Pg. 244, 1967.
  7. MSDS Safety Sheet

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