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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

 
    

The key studies for Biodegradation are considered to have a reliability rating of 1, however these are being used as read across to a structurally similar substance (Phenol, tetrapropenyl-, sulfurized, calcium salts CAS No. 68855-45-8) as there was no available data to fulfil this endpoint for the test material and so the reliability rating will be reduced to 2, according to the criteria of Klimisch, 1997.

Edwards et al, 1996 (WESTON report number: 96-043) conducted a CO2 evolution test on a test substance. This was conducted according to the EU Method C.4-C (Determination of the “Ready” Biodegradability - Carbon Dioxide Evolution Test).

The study on the ready biodegradability of the test substance in a CO2 Evolution Test (Schaefer et al, 1998, WILDLIFE INTERNATIONAL LTD. PROJECT NO.: 331E-114) was conducted according to OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)

The following information is taken into account for any hazard / risk / persistency assessment:

There are 2 studies for this endpoint which can be considered key studies:

Edwards et al, 1996 (WESTON report number: 96-043) conducted a CO2 evolution test on a test substance. This test was designed to determine the rate and extent of the ultimate biodegradation of the test substance under aerobic conditions.

4.7 - 10.4% degradation was seen in 28 days. Based on these results the test substance would not be considered readily biodegradable under the European Economic Community (EC) criteria, which requires 60% biodegradation within 28 days, achieved within 10 days of reaching 10% biodegradation.

In a study on the ready biodegradability of the test substance in a CO2 Evolution Test by Schafefer et al, 1998 (WILDLIFE INTERNATIONAL LTD. PROJECT NO.: 331E-114) the test substance can be described as not readily biodegradable under the conditions of the test and only 13.4% degradation was seen in 28 days.

Value used for CSA:Biodegradation in water: under test conditions no biodegradation observed

rating of 1, however these are being used as read across to a structurally similar substance (Phenol, tetrapropenyl-, sulfurized, calcium salts CAS No. 68855-45-8) as there was no available data to fulfil this endpoint for the test material and so the reliability rating will be reduced to 2, according to the criteria of Klimisch, 1997.

Edwards et al, 1996 (WESTON report number: 96-043) conducted a CO2 evolution test on a test substance. This was conducted according to the EU Method C.4-C (Determination of the “Ready” Biodegradability - Carbon Dioxide Evolution Test).

The study on the ready biodegradability of the test substance in a CO2 Evolution Test (Schaefer et al, 1998, WILDLIFE INTERNATIONAL LTD. PROJECT NO.: 331E-114) was conducted according to OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)

udy on the ready biodegradability of the test substance in a CO2 Evolution Test (Schaefer et al, 1998, WILDLIFE INTERNATIONAL LTD. PROJECT NO.: 331E-114) was conducted according to OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test) 1, however these are being used as read across to a structurally similar substance (Phenol, tetrapropenyl-, sulfurized, calcium salts CAS No. 68855-45-8) as there was no available data to fulfil this endpoint for the test material and so the reliability rating will be reduced to 2, according to the criteria of Klimisch, 1997.  

The key studies for Biodegradation are considered to have a reliability rating of 1, however these are being used as read across to a structurally similar substance (Phenol, tetrapropenyl-, sulfurized, calcium salts CAS No. 68855-45-8) as there was no available data to fulfil this endpoint for the test material and so the reliability rating will be reduced to 2, according to the criteria of Klimisch, 1997.

Edwards et al, 1996 (WESTON report number: 96-043) conducted a CO2 evolution test on a test substance. This was conducted according to the EU Method C.4-C (Determination of the “Ready” Biodegradability - Carbon Dioxide Evolution Test).

The study on the ready biodegradability of the test substance in a CO2 Evolution Test (Schaefer et al, 1998, WILDLIFE INTERNATIONAL LTD. PROJECT NO.: 331E-114) was conducted according to OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)

The key studies for Biodegradation are considered to have a reliability rating of 1, however these are being used as read across to a structurally similar substance (Phenol, tetrapropenyl-, sulfurized, calcium salts CAS No. 68855-45-8) as there was no available data to fulfil this endpoint for the test material and so the reliability rating will be reduced to 2, according to the criteria of Klimisch, 1997.

Edwards et al, 1996 (WESTON report number: 96-043) conducted a CO2 evolution test on a test substance. This was conducted according to the EU Method C.4-C (Determination of the “Ready” Biodegradability - Carbon Dioxide Evolution Test).

The study on the ready biodegradability of the test substance in a CO2 Evolution Test (Schaefer et al, 1998, WILDLIFE INTERNATIONAL LTD. PROJECT NO.: 331E-114) was conducted according to OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)

Edwards et al, 1996 (WESTON report number: 96-043) conducted a CO2 evolution test on a test substance. This was conducted according to the EU Method C.4-C (Determination of the “Ready” Biodegradability - Carbon Dioxide Evolution Test).

The study on the ready biodegradability of the test substance in a CO2 Evolution Test (Schaefer et al, 1998, WILDLIFE INTERNATIONAL LTD. PROJECT NO.: 331E-114) was conducted according to OECD Guideline 301 B (Ready Biodegradability: CO2lution Test)

The key studies for Biodegradation are considered to have a reliability rating of 1, however these are being used as read across to a structurally similar substance (Phenol, tetrapropenyl-, sulfurized, calcium salts CAS No. 68855-45-8) as there was no available data to fulfil this endpoint for the test material and so the reliability rating will be reduced to 2, according to the criteria of Klimisch, 1997.

Edwards et al, 1996 (WESTON report number: 96-043) conducted a CO2 evolution test on a test substance. This was conducted according to the EU Method C.4-C (Determination of the “Ready” Biodegradability - Carbon Dioxide Evolution Test).

The study on the ready biodegradability of the test substance in a CO2 Evolution Test (Schaefer et al, 1998, WILDLIFE INTERNATIONAL LTD. PROJECT NO.: 331E-114) was conducted according to OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The key studies for Biodegradation are considered to have a reliability rating of 1, however these are being used as read across to a structurally similar substance (Phenol, tetrapropenyl-, sulfurized, calcium salts CAS No. 68855-45-8) as there was no available data to fulfil this endpoint for the test material and so the reliability rating will be reduced to 2, according to the criteria of Klimisch, 1997.

Edwards et al, 1996 (WESTON report number: 96-043) conducted a CO2 evolution test on a test substance. This was conducted according to the EU Method C.4-C (Determination of the “Ready” Biodegradability - Carbon Dioxide Evolution Test).

The study on the ready biodegradability of the test substance in a CO2 Evolution Test (Schaefer et al, 1998, WILDLIFE INTERNATIONAL LTD. PROJECT NO.: 331E-114) was conducted according to OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)

The following information is taken into account for any hazard / risk / persistency assessment:

There are 2 studies for this endpoint which can be considered key studies:

Edwards et al, 1996 (WESTON report number: 96-043) conducted a CO2 evolution test on a test substance. This test was designed to determine the rate and extent of the ultimate biodegradation of the test substance under aerobic conditions.

4.7 - 10.4% degradation was seen in 28 days. Based on these results the test substance would not be considered readily biodegradable under the European Economic Community (EC) criteria, which requires 60% biodegradation within 28 days, achieved within 10 days of reaching 10% biodegradation.

In a study on the ready biodegradability of the test substance in a CO2 Evolution Test by Schafefer et al, 1998 (WILDLIFE INTERNATIONAL LTD. PROJECT NO.: 331E-114) the test substance can be described as not readily biodegradable under the conditions of the test and only 13.4% degradation was seen in 28 days.

Value used for CSA:Biodegradation in water: under test conditions no biodegradation observed