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EC number: 420-380-5
CAS number: 136465-81-1
PTH-Decahydroamide (Ro 31 -9373/000) was tested for ready
biodegradability according to the Closed Bottle test procedure (OECD
301D) at a concentration of 2.056 mg/L, in parallel with a 'soft'
reference substance (sodium acetate) and a more challenging reference
substance: "Dobanic Acid 103" (= linear alkyl benzene sulphonate).
Slight (6%) apparent degradation was recorded on Day 28 and further
confirmatory measurements were made at Day 35, however no further
biodegradation occurred during the final week of incubation. Both
reference substances were extensively biodegraded within 28 days,
confirming the activity of the inoculum, and toxicity controls
containing mixtures of PTH-Decahydroamide and each of the reference
substances showed no evidence of microbial toxicity that might suggest
that auto-inhibition had contributed to the failure of the test
substance to degrade. Based on the outcome of this study,
PTH-Decahydroamide is not readily biodegradable.
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