Registration Dossier
Registration Dossier
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EC number: 273-489-3 | CAS number: 68987-29-1
Surface tension
Administrative data
Link to relevant study record(s)
Description of key information
The substance1-Octadecanol, phosphate, potassium salt has to be considered as surface active substance.
Key value for chemical safety assessment
- Surface tension:
- 53.49
- in mN/m at 20°C and concentration in mg/L:
- 198.68
Additional information
- Drew Myers: Surfactant Science and Technology, 3. Aufl., John Wiley & Sons, 2006.
- Tony Hargreaves: Chemical formulation. An overview of surfactant based chemical preparations used in everyday life. The Royal Society of Chemistry, 2003.
- Thomas M. Schmitt: Analysis of surfactants, 2. Aufl. Surfactant Science Series Vol. 96. Vlg. Marcel Dekker, 2001.
- J.-L- Salager: Surfactants. Types and Uses. FIRP Booklet # E300-A. 2002
- U. Zoller (Hrsgb.): Handbook of Detergents. Part F: Production. Surfactant Science Series Vol. 142. Taylor & Francis, 2009.
Measured data are available for 1-Octadecanol, phosphate, potassium salt, the substance to be registered and the read-across substance Phosphoric acid, C16-18-alkyl esters, potassium salts. For both substances the measured values lay around the threshold value for identification as surfactant of 60 mN/m.
1-Octadecanol, phosphate, potassium salt
Surface tension: 67.6 – 69.21 mN/m (20 °C; 52.04 mg/L)
Phosphoric acid, C16-18-alkyl esters, potassium salts
Surface tension: 47.59 – 59.47 mN/m (20 °C; 198.68 mg/L)
Furthermore, in his own laboratory the registrant has obtained values of 40.4 – 58.3 mN/m and 52.4 – 53.1 mN/m for a 0.5 % and 1 % 1-Octadecanol, phosphate, potassium salt (Silastol H 200 TS), respectively.
Phosphoric esters of long-chain alcohols are described as surfactants in literature; furthermore the substance class is used as emulsifier in cosmetics.
In a weight of evidence approach is was considered to be suitable to use the measured mean value from the read-across substance for assessment, as these data describe more appropriate to the common uses and known physico-chemical profile of the substance.
Literature:
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