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EC number: -
CAS number: -
Not readily or inherently biodegradable
A study was performed to assess the ready biodegradability of
Golden Yellow Continuous.
The study was conducted in accordance with the OECD Guideline for
Testing of chemicals No. 301 F 'Manometric respirometry Test' (adopted
July 17, 1992).
A solution of Golden Yellow Continuous in a mineral medium was
inoculated and incubated for 28 d under aerobic conditions. During this
period, degradation was followed by BOD determinations.
Test item showed 5%degradation
after 28 days
Therefore, Golden Yellow Continuous is considered to be "Not
The control substance monoethylene glycol showed 82%degradation
after 14 days, proving the validity of the test system.
In addition, a study for inherent
biodegradability ofGolden Yellow Continuouswas
performed according to the OECD Guidelines for the Testing of Chemicals,
Inherent Biodegradability: Modified MITI Test II.: OECD, Adopted 12 May
As the test substance was difficult soluble in water, 15.0 mg test
substance was added to either deionized water (abiotic control) or
medium, with transonic treatment for 15 min to achieve a good
dispersion, and the solution was then directly transferred to the
At the start of the test, NO2--N and NO3--N
concentrations of the test suspensions were <0.03mg/L and 0.05mg/L,
respectively. NO2--N and NO3--N
concentrations of the inoculum blank were <0.03mg/L and 0.04mg/L
respectively. At the end of the test, NO3--N
concentrations of the test suspensions and inoculum blank were 5.99
mg/L, 5.83 mg/L, 6.04 mg/L (3 replicates) and 6.56 mg/L, NO2--N
concentrations of the test suspensions and the inoculum blank were
<0.03mg/L. The results revealed that there was no nitrification in test
Results of recovery tests showed that the percent recovery of the
test substance from water + test substance was 81.5% and the recovery
from test medium + inoculum + test substance was 82.8% at start of the
At the end of the test, the residual content of test substance of
abiotic control and the three test suspensions were 13.2 mg and 12.3 mg,
12.3 mg and 12.2 mg (3 replicates), respectively. Considering the
recovery rate, the reduction of the test substance in abiotic control
might be due to the loss during extraction process of test substance but
The percentage primary biodegradation of test suspensions were
6.2%, 6.5%, and 7.5% (3 replicates).
The percentage biodegradation at the end of the test by BOD was 0%.
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