2,6,10,15,19,23-hexamethyltetracosane: biodegradation in water: screening tests: 001 key | experimental result
HERO ID
5016725
Reference Type
Technical Report
Year
2011
Language
English
| HERO ID | 5016725 |
|---|---|
| Year | 2011 |
| Title | 2,6,10,15,19,23-hexamethyltetracosane: biodegradation in water: screening tests: 001 key | experimental result |
| Authoring Organization | European Chemicals Agency |
| Abstract | The ready biodegradation of the squalane was determined by the carbon dioxide evolution test method (OCDE guideline 301B). Tests of ready biodegradability are stringent tests that provide limited oppotunity for acclimation and biodegradation to occur. In the CO2 test, inoculated mineral medium was dosed with a known amount of test substance as the nominal sole source of organic carbon and aerated with CO2 -free air. The CO2 produced from the mineralization of organic carbon within the test chambers was displaced by the ow of CO2 -free air and trapped as K2CO3 in KOH trapping solution. The amount of CO2 produced by the test substance is expressed as a percentage of the theoretical amount of CO2 that could have been produced if complete biodegradation of the substance occurred. The test contained a blank control, three reference groups and one treatment group. Each group contained two replicate test chambers. The blank control was used to measure the background CO2 production of the inoculum and was dosed with a carbon source. The reference chambers were dosed with either canola oil, Synuid or Ultra Low Sulfur Diesel at a concentration of 10 mg C/L. The treatment group test chambers were used to evaluate the test substance at concentration of approximately 10 mg C/L. The results indicated that the activated sludge inoculum was active, degrading the canola oil reference 99.9%. The average cumulative percent biodegradation for squalane was 64.7%. However, squalane may be considered inherently biodegradable because it reached 60% of TCO2, though not within a 10 -days window of reaching 10% TCO2. |
| Url | https://echa.europa.eu/registration-dossier/-/registered-dossier/14412/5/3/2 |
| Is Certified Translation | No |
| Dupe Override | No |
| Number Of Pages | 3 |
| Is Public | Yes |
| Language Text | English |