Registration Dossier

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Adsorption / desorption:

Hydrocarbons, C12-C16, n-alkanes, isoalkanes, cyclics, aromatics (2-25%) is a hydrocarbon UVCB. Standard tests for this endpoint are intended for single substances and are not appropriate for this complex substance. However, this endpoint is characterised using quantitative structure property relationships for representative hydrocarbon structures that comprise the hydrocarbon blocks used to assess the environmental risk of this substance with the PETRORISK model (see Product Library in PETRORISK report attached in IUCLID section 13).

Adsorption coefficient has been calculated using Petrorisk.  The log Koc for this substance ranges from 2.67 - 8.33.  The Koc for this substance ranges from 4.68 x10^2 - 2.14 x10^8.

 

Distribution modelling:

There is no data available for Hydrocarbons, C12-C16, n-alkanes, isoalkanes, cyclics, 2-25% aromatics. Data is read across from structural analogues such as Hydrocarbons, C9-C14 aliphatics, 2-25% aromatics and Hydrocarbons, C14-C20 aliphatic, 2-30% aromatics.

Hydrocarbons, C12-C16, n-alkanes, isoalkanes, cyclics, aromatics (2-25%) straddles Hydrocarbons, C9-C14, Aliphatics, (2-25% Aromatics) and Hydrocarbons, C14-C20, Aliphatics (2-30% Aromatics). Read across justification documents have been provided for the same in Section 13 of the dossier. For this substance, a worst case scenario approach has been used for each endpoint.

The distribution of Hydrocarbons, C9-C12, n-alkanes, isoalkanes, cyclics, aromatics (2-25%) in the environmental compartments, air, water, soil, and sediment, has been calculated using the PETRORISK Model, version 5.2. Based on the regional scale exposure assessment, the multimedia distribution of the substance is 96 % to air, 1.4 % to water, 0.077 % to soil and 1.3 % to sediment.

 

The distribution of Hydrocarbons, C10-C13, n-alkanes, isoalkanes, cyclics, aromatics (2-25%) in the environmental compartments, air, water, soil, and sediment, has been calculated using the PETRORISK Model, version 5.2. Based on the regional scale exposure assessment, the multimedia distribution of the substance is 91 % to air, 1.9 % to water, 0.11 % to soil and 4.4 % to sediment.

 

The distribution of Hydrocarbons, C14-C18, n-alkanes, isoalkanes, cyclics, aromatics (2-30%) in the environmental compartments, air, water, soil, and sediment, has been calculated using the PETRORISK Model, version 5.2. Based on the regional scale exposure assessment, the multimedia distribution of the substance is 91.9% to air, 1.6% to water, 3.2% to sediment and 3.3% to soil.

These data are used as read across data for Hydrocarbons, C12-C16, n-alkanes, isoalkanes, cyclics, 2-25% aromatics.

Distribution modeling results are included in the 'Multimedia distribution modeling results' tab in the PETRORISK spreadsheet attached to Section 13 of the dossier.