Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Adsorption / desorption:

C9-14 Aliphatics (≤ 2% aromatic) are hydrocarbon UVCBs. Standard tests for this endpoint are intended for single substances and are not appropriate for these complex substances. However, this endpoint is characterized using quantitative structure property relationships for representative hydrocarbon structures that comprise the hydrocarbon blocks used to assess the environmental risk of these substances with the PETRORISK model (see Product Library  in PETRORISK spreadsheet attached to Section 13 of the dossier).

Koc of decane has been estimated by calculation in the Concawe Library of Petrorisk, using SPARC v4.2 program (May 2008). The calculated value is 1.45 x10^4 L/kg, using a log Kow of 5.86.

Koc of undecane has been estimated by calculation in the Concawe Library of Petrorisk, using SPARC v4.2 program (may 2008). The calculated value is 5.62 x10^4 L/kg, using a log Kow of 6.42.

Koc of dodecane has been estimated by calculation in the Concawe Library of Petrorisk, using SPARC v4.2 program (May 2008). The calculated value is 1.10 x10^5 L/kg, using a log Kow of 6.98.

Koc of tretradecane has been estimated by calculation in the Concawe Library of Petrorisk, using SPARC v4.2 program (May 2008). The calculated valueis 7.59 x10^5 L/kg, using a log Kow of 8.11.

Volatilisation:

Volatilisation is dependent on Henry's Constant (HC) which is not applicable to complex substances. However, HC values for representative structures are included in the PETRORISK spreadsheet attached to IUCLID Section 13.

Henry's law constant for decane has been estimated in the Concawe library, using SPARC v4.2 program. The obtained value is 3.311 atm-m3/mol.

Henry's law constant for undecane has been estimated in the Concawe library, using SPARC v4.2 program. The obtained value is 4.47 atm-m3/mol.

Henry's law constant for dodecane has been estimated in the Concawe library, using SPARC v4.2 program. The obtained value is 6.17 atm-m3/mol.

Henry's law constant for tetradecane has been estimated in the Concawe library, using SPARC v4.2 program. The obtained value is 11.48 atm-m3/mol.

Distribution modelling:

The distribution ofC9-14 Aliphatics (≤ 2% aromatic)in the environmental compartments, air, water, soil, and sediment, has been calculated using the PETRORISK Model, version 5.2/5.3.Computer modeling is an accepted method for estimating the environmental distribution of chemicalsDistribution modelling results are included in the 'Multimedia distribution modelling results' tab in the PETRORISK spreadsheet attached to IUCLID section 13.

Based on the regional scale exposure assessment, the multimedia distribution of Hydrocarbons, C9-C11, n-alkanes, isoalkanes, cyclics, <2% aromatics is 80.0 % to air, 3.6 % to water, 3.4 % to soil and 13.0 % to sediment.

Based on the regional scale exposure assessment, the multimedia distribution of Hydrocarbons, C9-C11, isoalkanes, cyclics, <2% aromatics is 69.5 % to air, 5.5 % to water, 5.2 % to soil and 19.8 % to sediment.

Based on the regional scale exposure assessment, the multimedia distribution of decane is 48.62 % to air, 5.98 % to water, 9.49 % to soil and 35.91 % to sediment.

Based on the regional scale exposure assessment, the multimedia distribution of Hydrocarbons, C10-C13, isoalkanes, cyclics, <2% aromatics is 46.1 % to air, 2.7 % to water, 15.1 % to soil and 36.1 % to sediment.

Based on the regional scale exposure assessment, the multimedia distribution of of Hydrocarbons, C10-C14, (even numbered), n-alkanes, isoalkanes, <2% aromatics is 45.2 % to air, 2.5 % to water, 16.1 % to soil and 36.2 % to sediment.

Based on the regional scale exposure assessment, the multimedia distribution of undecane is 41.8 % to air, 2.71 % to water, 8.17 % to soil and 47.32 % to sediment.

Based on the regional scale exposure assessment, the multimedia distribution of dodecane is 39.52 % to air, 2.4 % to water, 20.04 % to soil and 38.04 % to sediment.

Based on the regional scale exposure assessment, the multimedia distribution of Hydrocarbons, C12-C13, isoalkanes, cyclics, <2% aromatics is 28.0 % to air, 2.81 % to water, 22.03 % to soil and 47.04 % to sediment.

Based on the regional scale exposure assessment, the multimedia distribution of Hydrocarbons, C13-C15, n-alkanes, isoalkanes, cyclics, <2% aromatics is 3.9 % to air, 1.1 % to water, 8.9 % to soil and 86.1 % to sediment.

Based on the regional scale exposure assessment, the multimedia distribution of tetradecane is 4.25 % to air, 0.61 % to water, 7.83 % to soil and 87.31 % to sediment.

Based on the regional scale exposure assessment, the multimedia distribution of hexadecane is 5.13 % to air, 0.1 % to water, 89.03 % to sediment and 5.74 % to soil.

Based on the regional scale exposure assessment, the multimedia distribution of isododecane is 39.52 % to air, 2.4 % to water, 20.04 % to soil and 38.04 % to sediment.

Additional information