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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

36% degradation within 28 days  (% of COD) , cannot be considered as inherently biodegradable (OECD 302 C)

Key value for chemical safety assessment

Additional information

The inherent biodegradability of 2,4 -DTAP was evaluated. The method used followed that described in the OECD Guidelines for Testing of Chemicals / Section 2: Degradation and Accumulation, Test No. 302C "Inherent Biodegradability, Modified MITI Test (II). A mixed population of activated sewage sludge microorganisms was used as inoculum and aniline as reference substance. Initial concentration of test substance was 30 mg/l and reference substance 100 mg/l. 2,4 -DTAP attained 36% degradation within 28 days calculated from oxygen uptake (% of COD) and therefore, cannot be considered as inherently biodegradable under the strict terms and conditions of the OECD Guidelines. TOC analysis of 2,4 -DTAP was not possible due to the insoluble nature of the test material. A modified MITI test was carried out due to this fact. A COD value of 2.80 mg O2/mg was obtained for the test material.