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EC number: 203-851-8 | CAS number: 111-26-2
Biodegradation in soil
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in soil
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Data is from computational model developed by USEPA
- Qualifier:
- according to guideline
- Guideline:
- other: as mentioned below
- Principles of method if other than guideline:
- Fugacity Model by EPI Suite estimation database
- GLP compliance:
- not specified
- Test type:
- other: estimation
- Radiolabelling:
- not specified
- Oxygen conditions:
- other: estimated data
- Soil classification:
- not specified
- Parameter followed for biodegradation estimation:
- test mat. analysis
- Soil No.:
- #1
- % Degr.:
- 50
- Parameter:
- other: half-life
- Sampling time:
- 17.333 d
- Soil No.:
- #1
- DT50:
- 17.333 d
- Type:
- other: estimation
- Remarks on result:
- other: 416 hrs = 17.333 days
- Transformation products:
- not specified
- Evaporation of parent compound:
- not specified
- Volatile metabolites:
- not specified
- Residues:
- not specified
- Conclusions:
- Biodegradation half-life of test substance Hexylamine in soil was estimated to be 17.333 days (416 hrs).
- Executive summary:
The half-life period ofHexylamine(CAS No. 111-26-2) in soil was estimated using Level III Fugacity Model by EPI Suite version 4.1 estimation database (EPI suite, 2016). If released into the environment, 70.3% of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of Hexylamine in soil is estimated to be 17.33 days(416 hrs). Based on this half-life value of Hexylamine, it is concluded that the chemical is not persistent in the soil environment and the exposure risk to soil dwelling animals is moderate to low.
Reference
|
Mass Amount (percent) |
Half-Life (hr) |
Emissions (kg/hr) |
Soil |
70.3 |
416 |
1000 |
|
Fugacity (atm) |
Reaction (kg/hr) |
Advection (kg/hr) |
Reaction (percent) |
Advection (percent) |
soil |
2.17e-009 |
941 |
0 |
31.4 |
0 |
Description of key information
The half-life period ofHexylamine(CAS No. 111-26-2) in soil was estimated using Level III Fugacity Model by EPI Suite version 4.1 estimation database (EPI suite, 2016. If released into the environment, 70.3% of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of Hexylamine in soil is estimated to be 17.33 days(416 hrs). Based on this half-life value of Hexylamine, it is concluded that the chemical is not persistent in the soil environment and the exposure risk to soil dwelling animals is moderate to low.
Key value for chemical safety assessment
- Half-life in soil:
- 17.33 d
- at the temperature of:
- 25 °C
Additional information
Various study and predicted data for the test compoundHexylamine(CAS No. 111-26-2) were reviewed for the biodegradation end point which are summarized as below:
The half-life period ofHexylamine(CAS No. 111-26-2) in soil was estimated using Level III Fugacity Model by EPI Suite version 4.1 estimation database (EPI suite, 2016. If released into the environment, 70.3% of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period ofHexylaminein soil is estimated to be 17.33 days(416 hrs).Based on this half-life value ofHexylamine, it is concluded that the chemical is not persistent in the soil environment and the exposure risk to soil dwelling animals is moderate to low.
The study was carried out to determine the effects of microbial utilization of sorbed amines and to establish whether the rate of biodegradation of a sorbed substrate is equal to its rate of desorption (WSZOLEK, P.C; ALEXANDER, M., 1979). The incubation time was 0.3 and 0.42 days. The inoculum was a mixed culture of bacteria grown on the individual amines as sole carbon source to give an initial level of about 106cells/ml. The original source of the organisms was Lima Loam. The tests were carried under aerobic conditions at a pH of 7.2 and concentration of 71 and 63 ppm at 30°C and 22°C. The rate of biodegradation of n-hexylamine under aerobic conditions is 100%. It can be conducted that n-hexylamine biodegrades fast with acclimation.
On the basis of above results for target substance, it can be concluded that the test substance Hexylaminecan be considered to be not persistent in the soil environment
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