Registration Dossier
Registration Dossier
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EC number: 943-366-5 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
The exposure to soil is unlikely. The target substance is an UVCB substance consisting of adipic acid, di-anhydride with bis(acetic acid) (ca. 57 %), Acetic acid (ca.32.5 %), acetic anhydride (ca. 7.1 %), adipic anhydride (ca. 1.5 %) and oligomeric adipic anhydrides (ca. 1.0 %). Acetic acid is very soluble to water and has low toxicity. Adipic acid is not very soluble and has very low toxicity. Acetic anhydride is slowly soluble to water and forms acetic acid when in contact with water. All of the three main constituents are not bioaccumulative (bioconcentration factor of all three main constituents is 3.16) and are readily biodegradable in water and soil.
Log Koc values of the three main constituents are 1.153 -1.585 (based on the log kow values). Therefore the target substance is expected to have high mobility in environment. Acetic anhydride has some potential for volatilization from soil for acetic anhydride based on the vapor pressure of the substance. Volatilization of acetic acid from moist soil surfaces is not expected based on the Henry's law, but vapour pressure indicates that volatilization may occur from dry soil surfaces. For adipic acid volatilisation from dry or moist soil are not expected based on the Henry's law and vapour pressure of the substance.
Local point sources can be disregarded as there are no sources that emit directly to the terrestrial compartment (ES&RC in sections 9 and 10 of CSR). There are no releases to STP from formulation and manufacture of the substance. Discharge to STP is only relevant from the starch modifying process, but this depends from the local site's permission to release acetates to STP. The possible spreading of STP sewage sludge as fertilizer to soil causes low hazard to soil organisms as the main constituents are readily biodegradable and have low toxicity to environment. Indirect deposition to soil is only possible via air deposition.
Based on the above facts, there is no further need to investigate the toxicity in terrestrial environment.
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