LINEAR ALKYLBENZENE SULFONATE (LAS) - UNEP Chemicals

OECD SIDS LINEAR ALKYLBENZENE SULFONATE (LAS)
1.3 Physico-Chemical properties
Table 1 Summary of physico-chemical properties
Property Value Method Reference (Reliability)
Physical state Solid Dossier 1.1B
Melting point
198.5ºC
274ºC
279ºC
284ºC
290ºC
Experimental (C12.0)
Calculated as C10*
Calculated as C11*
Calculated as C12*
Calculated as C13*
Experimental (C12.0)
Dossier 2.1a (2)
Dossier 2.1b (2)
Dossier 2.1c (2)
Dossier 2.1d (2)
Dossier 2.1e (2)
Decomposition onset
at 444ºC
Dossier 2.2a (2)
Boiling point
630ºC
642ºC
Calculated as C10*
Calculated as C11*
Dossier 2.2b (2)
Dossier 2.2c (2)
654ºC
Calculated as C12* Dossier 2.2d (2)
665ºC
Calculated as C13* Dossier 2.2e (2)
Relative density 1.06 g/cm 3 Experimental (C11.6) Dossier 2.3a (4)
Bulk density 450-550 kg/m 3
Vapor pressure (at 25ºC)
Partition coefficient noctanol/water
(log value)
Critical micelle
concentration
3 x 10 -13 Pa
2.88 x 10 -12 Pa
1.22 x 10 -12 Pa
5.13 x 10 -13 Pa
2.16 x 10 -13 Pa
3.32
1.94
2.43
2.92
3.42
Experimental (C11.6,
C12.0)
Calculated as C12
[using all phenyl
position isomers]
Calculated as C10*
Calculated as C11*
Calculated as C12*
Calculated as C13*
Calculated as C11.6
[using all phenyl
position isomers]]
Calculated as C10*
Calculated as C11*
Calculated as C12*
Calculated as C13*
Dossier 2.3b,c (4)
Dossier 2.4a (4)
Dossier 2.4b (2)
Dossier 2.4c (2)
Dossier 2.4d (2)
Dossier 2.4e (2)
Dossier 2.5a (2)
Dossier 2.5b (2)
Dossier 2.5c (2)
Dossier 2.5d (2)
Dossier 2.5e (2)
0.1 g/L Experimental (C12) Dossier 2.6Aa (2)
Water solubility 250 g/L Experimental (C11.6) Dossier 2.6Ab (2)
pH 10.0 ± 1 1% solution (C12.0) Dossier 2.6Ba (4)
pKa