Registration Dossier
Registration Dossier
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EC number: - | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
One adsorption / desorption study is available, valid with restrictions. From that study the following conclusion was drawn:
For all soils tested the adsorption percentages were calculated to be very high. These results and the observed adsorption parameters Kd and Koc values showed that the test substance adsorbed very strongly to the soils tested.
The values for desorption percentage and Kdes were observed to be very low.
From literature data a summary on fate and distribution is made.The following conclusion can be made:
The biodegradation of tartaric acid (mTA) complexed with iron (III) in soils is comparable to the half-life of tartaric acid i.e. 10 days at most because the stereoisomeric composition of tartaric acid (mTA), and Fe(III) complexation do not or only slightly influence the degradation rates in soils. The short half-life and mineralization of tartaric acid (mTA) complexed with iron (III) in soil is in line with its ready biodegradability, and evidence of its conversion into carbon dioxide and water by microorganisms. Tartaric acid (mTA) complexed with iron (III) will also degrade in water-logged soils because of the ability of microorganisms to convert this substance in the absence of oxygen (anaerobic conditions). Finally, the antropogenic tartaric acid (mTA) complexed with iron (III) will become part of the natural LMW organic acid pool.
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