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Physical & Chemical properties

Surface tension

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Given the higher hydrophilicity of TEPA compared to TETA we expect the measured surface tension value obtained for TOFA DimerFA TEPA to be at the upper limit of the Cluster 2 PAAs described by the reaction adducts of monomeric and dimeric fatty acids with polyamines and with a residual free amine content of ~10wt%.  The surface tension of TOFA DimerFA TEPA was determined using the Pt ring method and ranged from 63.93 to 68.92 mN/m.  The surface tension of DimerFA_PEPA_PAA is expected to be similar or lower than these values.  From the surface tension results, the CMC was estimated to be 60 mg/L (corrected for amine 54 mg/L).

Key value for chemical safety assessment

Surface tension:
in mN/m at 20°C and concentration in mg/L:

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