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EC number: 257-182-1
CAS number: 51410-72-1
biodegradation of MAPTAC was investigated in a study conducted according
to OECD Guideline 301 F, adopted 17th July 1992 (Ready Biodegradability:
Manometric Respirometry Test) and EU Method C.4-D, 30 May 2008 over a
period of 56 days using activated sludge sampled from the aeration tank
of a municipal sewage treatment plant as inoculum. The biodegradation
rate was determined by measurement of O2 consumption. Inoculum blank and
procedural/functional control with the reference substance sodium
benzoate were performed.
functional control reached the pass level >60% after 14 d.
not reach the pass level of 60% for ready biodegradability within the
10-d window as well as after 28 days of incubation and, therefore,
cannot be termed as readily biodegradable. According to the “Revised
introduction to the OECD guidelines for testing of chemicals, section 3”
the test substance can be termed as inherently biodegradable, since a
biodegradation of more than 70% was reached in all 4 replicates within
to Annex IX 126.96.36.199. Column 2, a study on biodegradation in water and
sediment does not need to be conducted as the substance is inherently
biodegradable (experimental result please see chapter 5.2.1). Moreover,
direct or indirect exposure of sediment is low. Based on the
physicochemical properties (log Kow = -2.58), MAPTAC can be expected to
have a low potential for adsorption.
to Annex IX 188.8.131.52. Column 2, a study on biodegradation in soil does
not need to be conducted since direct or indirect exposure of soil is
low. Based on the physicochemical properties (log Kow = -2.58), MAPTAC
can be expected to have a low potential for adsorption.
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