Registration Dossier
Registration Dossier
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EC number: 439-840-1 | CAS number: 20846-91-7
Surface tension
Administrative data
Link to relevant study record(s)
Description of key information
In a GLP study conducted according to OECD Guideline 115, the surface tension of an aqueous solution of trisodium EDDS at a concentration of 1.01 g/L was 73.3 mN/m at 20oC (van Helvoirt, 1993c).
Key value for chemical safety assessment
- Surface tension:
- 73.3
- in mN/m at 20°C and concentration in mg/L:
- 1 010
Additional information
In a GLP study conducted according to OECD Guideline 115, the surface tension of a aqueous solution of trisodium EDDS was determined using the suspended ring method. The test material was prepared as a solution in double-distilled water (1.01 g/L) and the tensiometer used had a platinum-iridium wire ring with a radius of 9.545 mm. The mean corrected surface tension determined from five measurements was 73.3 mN/m at 20°C. Trisodium EDDS is not considered a surface-active agent based on EEC criteria (van Helvoirt, 1993c), and a similar result would expected for EDDS acid.
[Data on trisodium EDDS is considered relevant to use for understanding the potential surface tension of EDDS acid, and is acceptable for using as read-across information. On structural grounds the surface tension is not expected to differ significantly.]
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