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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Readily biodegradable: 78- 100% (ThCO2) in 28 days (OECD 301B)

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

Comparing all available readily biodegradation studies, the members of the AES category are generally to be found readily biodegradable (HERA [1] & Danish EPA [2]).

Since no biodegradability tests are available for AES (C10 -12, 1-2.5EO) Na (CAS 68610-66-2) a read-across approach from the two structural comparable AES (C12-14, 1-2.5EO) MIPA (CAS 1187742 -72 -8) and AES (C12-14, 1-2.5EO) Na (CAS 68891-38-3) was applied.

The first GLP-study was performed according to OECD guideline 301B and non-adapted domestic sludge was used (Sasol, 2004). After 28 days a biodegradation rate between 78 - 100% (CO2 evolution) was reported for the MIPA salt.

The second GLP-study was performed with non-adapted domestic sludge according to EU-guidelines (C.4-A) (Sasol, 1993a). This test shows a biodegradation rate of 100% (DOC removal) after 28 days for the Na salt. 

Therefore, AES (C10 -12, 1-2.5EO) Na (CAS 68610-66-2) is considered to be readily biodegradable.

[1] Danish EPA - Environmental and Health Assessment of Substances in Household Detergents and Cosmetic Detergent Products (2001). Environmental Project No. 615, pp. 24-28

[2] HERA - Human & Environmental Risk Assessment on ingredients of European household cleaning products (2004). Alcohol Ethoxysulphates (AES).