Registration Dossier
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EC number: 938-828-8 | CAS number: 1463474-95-4
Phototransformation in water
Administrative data
Link to relevant study record(s)
Description of key information
Two phototransformation studies are available for a structurally very similar substance to HBED-Fe. The key study is a valid GLP study performed according the guideline. The other study can be used as supporting study. The half-life time for phototransformation of EDDHMA-FeNa at 25 +/- 3 degrees C is determined to be 40.66 and 35.4 hours for the two major components of this UVCB substance, at a light intensity of 4.86E20 photons/second in the wavelength range of 290 - 500 nm.
Key value for chemical safety assessment
- Half-life in water:
- 40 h
Additional information
The degradation of EDDHMA-Fe in water as a result of direct photo-transformation (photolysis) was investigated according to the OECD Draft guidance document "Direct Phototransformation of Chemicals in water".
Chemical analysis of EDDHMA-FeNa resulted not in one peak, but in 4 peaks (2 major peaks at approximately t = 6.5 and t = 19.9 minutes, respectively and two minor peaks at approximately t = 5.5 and t = 18.9 minutes, respectively). So probably, the test substance consists of at least 4 components. For practical reasons, the photochemic degradation of the 2 major components (component A and B) was determined.
The half-life time for phototransformation of EDDHMA-FeNa at 25 +/- 3 degree C is determined to be 40.66 and 35.4 hours for the two major components of this UVCB substance, at a light intensity of 4.86E20 photons/second in the wavelength range of 290 - 500 nm.
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