Registration Dossier
Registration Dossier
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EC number: 283-985-1 | CAS number: 84776-57-8
Surface tension
Administrative data
Link to relevant study record(s)
- Endpoint:
- surface tension
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study does not need to be conducted because water solubility is below 1 mg/L at 20°C
Reference
Description of key information
The surface tension is not considered to be relevant for substance Fatty acids, C18-24, zinc salts.
Key value for chemical safety assessment
Additional information
This study does not need to be conducted if the water solubility of the substance is below 1 mg/L at 20 degree C (cf. Annex VII, section 7.6, column 2 of Regulation (EC) No 1907/2006). The water solubility of substance Fatty acids, C18 -24, zinc salts is < 0.63 mg/L. Thus waiving in accordance with Annex VII, section 7.6, column 2 of Regulation (EC) No 1907/2006 is justified.
Moreover, it can safely be assumed that substance fatty acids, C18-24, zinc salts is not surface active based on read-across to a structural analogue.
Surface tension of the structural analogue substance Fatty acids, C16-18, zinc salts, whose water solubility ranges from 0.3 to 1.8 mg/L depending on test conditions, has been measured and is given here as supplementing information. The surface tension of a 90 % saturated aqueous solution of substance Fatty acids, C16-18, zinc salts was 64.56 mN/m (standard deviation 0.05 mN/m). Due to the fact that the surface tension is > 60 mN/m, substance Fatty acids, C16-18, zinc salts is classified as not surface-active substance. The substance Fatty acids, C18-24, zinc salts (carbon chain length: 18-24) can be regarded as being not surface-active as well, since surface activity depends mainly on the chain length and the water solubility of a substance which is comparable for the substances Fatty acids, C16-18, zinc salts and Fatty acids, C18-24, zinc salts.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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