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EC number: 264-731-9 | CAS number: 64216-15-5
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
3,5,5-trimethylhexanoic acid is readily biodegradable (OECD 301 B: Hoechst AG, 1986).
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
The ready biodegradability of 3,5,5 -trimethylhexanoic acid was studied in a DOC Die-Away Test according to OECD 301A (Harlan, 2010). The biodegradation reached 96% after 21 d based on DOC removal. The 10 -d window was passed. In conclusion, 3,5,5 -trimethylhexanoic is readily biodegradable.
Test method |
Inoculum |
Result |
Evaluation |
Reliability |
Source |
OECD 301 A |
activated sludge, domestic, non-adapted |
96% in 21 d |
readily biodegradable |
1 |
Harlan (2010) |
OECD 301 B |
no data |
73 % ThCO2/DOC removal in 25 d |
readily biodegradable* |
4 |
Wellens (1986a) |
OECD 301 B |
no data |
63 % ThCO2/DOC removal in 25 d |
(not) readily biodegradable and failing 10-d window* |
4 |
Wellens (1986b) |
OECD 302 B |
activated sludge |
100 % DOC removal in 20 d |
inherently biodegradable* |
2 |
Wellens (1986c) |
Batch method (similar to OECD 302 B) |
activated sludge, not adapted |
60 % BOD of ThOD in 5 d |
inherently biodegradable* |
2 |
Zahn & Wellens (1980) |
Batch method (similar to OECD 302 B) |
activated sludge, not specified |
95 % of COD removal in 15 d |
inherently biodegradable* |
2 |
Wellens (1975a) |
*: Tests performed with 3,5,5 -Trimethylhexanoic acid (CAS 26896-18-4).
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