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EC number: 941-064-8 | CAS number: -
Surface tension
Administrative data
Link to relevant study record(s)
Description of key information
No surface tension
Key value for chemical safety assessment
Additional information
The surface tension of Salt reaction of cobalt(2 +) and C3/C10 carboxylates is not expected. Two tests on the surface tension according to OECD TG 115 were recently conducted for cobalt acetate (carbon chainlength: 2) and cobalt stearate (carbon chainlength: 18), yielding a result of not surface active for cobalt acetate (71.1 mN/m) and a weakly active for cobalt stearate (57.3mN/m). Since the Salt reaction of cobalt(2+) and C3/C10 carboxylates represents an inorganic salt containing anions of acids with carbon chainlength of 3 or/and 10, it can safely be assumed that this substance is of weaker surface activity than cobalt stearate. As stated in the ECHA endpoint specific guidance R7.1.18.1, p.182, a low surface tension (of below 33 mN/m) is one indicator for aspiration hazard. Since the surface active property of the Salt reaction of cobalt(2+) and C3/C10 carboxylates is considerably higher that the given value, further testing is not required (in accordance with regulation (EC) 1907/2006, Annex VII, section 7.6, Column 2).
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