Registration Dossier
Registration Dossier
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EC number: 619-057-3 | CAS number: 94667-33-1
Endpoint summary
Administrative data
Description of key information
The test substance is a colourless liquid with a weakly aromatic odour. The test substance has no freezing point down to a temperature of -50°C, whereas boiling ranges from 180 - 195°C. The relative density D420is 0.942. Its vapour pressure, extrapolated from the experimental vapour pressure curve LogPvapvs. 1/T, is 1.8E-06 Pa, 4.0E-06 Pa and 1.4E-05 Pa at 20°C, 25°C, and 50°C, respectively. Didecylmethylpoly(oxyethyl)ammonium propionate is completely miscible in water in the pH range 5 -9 at RT, as well as in ethanol and octanol (solubility > 250 g/L) at ca. 20°C in either case). The partition coefficient is not determinable. EC method A.8 is not applicable for surface active substances such as the test item. Also assessment by KOWWIN is considered inaccurate, being the software database very limited for surfactants. On the other hand, log Pow can be roughly obtained from solubility in pure n-octanol and water (log Pow ca. 0). However this calculation is of no use with regard to environmental fate & behaviour. Since no decomposition or chemical transformation is observed below 150°C, the test item can be considered stable. Didecylmethylpoly(oxyethyl)ammonium propionate has proved to have an auto-ignition temperature of 264°C, with flash point of 134°C. On the basis of experience in use and/or structural formula (absence of reactive groups), it does no show explosive properties or oxidizing properties. The test item has also proved to be a surfactant (surface tension: 30.5 mN/m at 20°C for an 1 g/L aqueous solution) and a non-newtonian fluid (dynamic viscosity: 3000 mPa.s and 400 mPa.s at 20°C and 40°C, respectively).
Additional information
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