Registration Dossier
Registration Dossier
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EC number: 601-238-3 | CAS number: 113163-37-4
Endpoint summary
Administrative data
Description of key information
Additional information
Stability
The stability of the substance was determined according to the OECD guideline 111 and the EU method, C. 7 (Currenta, 2009). Based on kinetic parameters, the following dissipation half-lives for a temparature of 25 °C were extrapolated based on the Arrhenius equation: pH 4 (25 °C): > 1 year
pH 7 (25 °C): 745 days
pH 9 (25 °C): 20 days.
Phototransformation in air:
As the substance is a UVCB substance 2-[2-(2-hydroxypropoxy)ethoxy]ethyl 2-hydroxypropyl phthalate and 1-O-{2-[(2-hydroxypropoxy)carbonyl]benzoyl}-6-O-(2-hydroxypropyl)hexitol were used as representative substances for the calculation of the phototransformation in air.
In the atmosphere half-lives of 0.21 and 0.33 h for two representative substances are estimated due to indirect photolysis with hydroxyl radicals, considering an OH-concentration of 500,000 radicals/cm³ as a 24-h average (Currenta, 2017)
Biodegradation
The substance is considered to be not readily biodegradable. After 28 days 67 % of the test substance had been degraded in a manometric respiratory test ( EU Method C.4-D), but failing the 10-day window (Currenta, 2009).
Bioaccumulation
A BCF of 3.16 is estimated for both, 2-[2-(2-hydroxypropoxy)ethoxy]ethyl 2-hydroxypropyl phthalate and 1-O-{2-[(2-hydroxypropoxy)carbonyl]benzoyl}-6-O-(2-hydroxypropyl)hexitol, two representatives of this UVCB-substance, using the EPI Suite program, v. 4.0 (Currenta, 2017), indicating that the substance has no bioaccumulation potential.
Adsorption / desorption
The measured Koc-value of the test item is 50 at pH 6.3 estimated by OECD Guideline 121 (Estimation of the Adsorption Coefficient (Koc) on Soil and on Sewage Sludge using High Performance Liquid Chromatography (HPLC) (Currenta, 2009).This indicates only a low potential for adsorption.
Henry's Law constant
The Henry's Law Constant of the substance is calculated for two representatives of the UVCB substance to be 0.00013 Pa m³/mol at a temperature of 25 °C for 2-[2-(2-hydroxypropoxy)ethoxy]ethyl 2-hydroxypropyl phthalate and 0.00016 Pa m³/mol for 1-O-{2-[(2-hydroxypropoxy)carbonyl]benzoyl}-6-O-(2-hydroxypropyl)hexitol. It is directly calculated as a ratio of the vapour pressure to the water solubility (Currenta, 2017). According to the classification scheme of Thomas (1990), the substance is low volatile from surface waters.
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