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EC number: 947-476-4 | CAS number: -
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Endpoint summary
Administrative data
Description of key information
For both alkyl-1,3 -diaminopropane and alkyl-1,3 -diaminopropane oleates sorption/desorption test results are available but because of the high degree of dissociation of R814M the results as observed for 14C octadecyl-1,3 -diaminopropane are used for risk assessment. This is in agreement with the effect assessment.
Table:Distribution constants for alkyl-1,3-diaminopropanes
Kpsoil |
520 L/kg |
Ksoil-water |
780 m3/m3 |
Kpsusp |
1040 L/kg |
Ksusp-water |
261 m3/m3 |
Kpsed |
520 L/kg |
Ksed-water |
261 m3/m3 |
Volatilisation of organic compounds from surface waters is estimated by the Henry’s law constant. The Henry's Law constant at environmental temperature is 0.0159 Pa.m3/mol at 12 C.
Considering the low values, volatilisation at environmental conditions is expected to be negligible.
Additional information
No sorption/desorption tests have been performed with the test substance"Reaction mass of Amines, N-tallow alkyltrimethylenedi-, (2-ethylhexanoates), Amines, N-tallow alkyltrimethylenedi-, acetates and n-tallow-1,3 -diaminopropane ditallate" (R814M). This substance is a salt of tallow-1,3 -diaminopropane (CAS no 1219010 -04 -4) and a mixture of talloil fatty acids, 2 -ethylhexoic and acetic acid.
Under environmental conditions a large extent of the salt is expected to be dissociated and the tallow-1,3 -diaminopropane fraction and is expected to sorb similarly as the 14C octadecyl-1,3 -diaminopropane used in the sorption/desorption test of the alkyl-1,3 -diaminopropanes. Available ecotoxicity test data confirm this high degree of dissociation based in similar aquatic ecotoxicity observed for R814M and tallow or oleyl-1,3 -diamino propane.
For both alkyl-1,3 -diaminopropane and alkyl-1,3 -diaminopropane oleates sorption/desorption test results are available but as indicated because of the high degree of dissociation of R814M the results as presented below of the alkyl-1,3 -diaminopropane will be used for risk assessment.
For 14Coctadecyl-1,3 -diaminopropane a mean KFads value for the four soils of 520 L/kg is observed and used as a realistic worst-case value to derive the distribution constants for the alkyl-1,3-diaminopropanes.
Because there is no principal difference between soil and sediments considering the sorption properties and because for cationic surfactants the degree of sorption is not directly correlated to the organic carbon content, the value for soil will also be used for sediment and suspended particles. For sludge which consists mainly of organic matter the sorption data as observed for soil are not considered to be representative. This is however not a serious problem because the removal by sorption in a waste water treatment plant will be close to what is observed in the waste water treatment simulation test i.e. 4.1% removal.
In the table below, the distribution constants used in this assessment are summarized:
Table:Distribution constants for alkyl-1,3-diaminopropanes
Kpsoil |
520 L.kg-1 |
Ksoil-water |
780 m3.m-3 |
Kpsusp |
1040 L.kg-1 |
Ksusp-water |
261 m3.m-3 |
Kpsed |
520 L.kg-1 |
Ksed-water |
261 m3.m-3 |
With a Kpsuspof 1040 L/kg and a concentration of 15 mg/L suspended matter in surface waters, the adsorbed fraction is calculated as 1.5%.
Volatilisation of organic compounds from surface waters is generally estimated by the Henry’s law constant. The Henry’s law constant is calculated from the ratio of the vapour pressure (Pa) and the CMC (mol/m3). The Henry's Law constant at environmental temperature is 0.0159 Pa.m3/mol at 12 C based on the vapour pressure of 0.0015 Pa, molecular weight of 240 and CMC of 149 mg/L. Considering the low values, volatilisation at environmental conditions is expected to be negligible.
This value is considered to be a worst-case representative for the longer alkyl chain alkyl-1,3 -diaminopropanes and the acetate, 2 -ethylhexanoate and oleate salts.
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