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Environmental fate & pathways

Biodegradation in soil

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Reference
Endpoint:
biodegradation in soil: simulation testing
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Justification for type of information:
Data is from computational model developed by USEPA
Reference:
Composition 0
Qualifier:
according to
Guideline:
other: Modeling database
GLP compliance:
not specified
Test type:
other: Estimated data
Test material information:
Composition 1
Specific details on test material used for the study:
- Name of the test material: 2-isopropyl-5-methylcyclohexanone
- Molecular formula: C10H18O
- Molecular weight: 154.2512 g/mol
- Substance type: Organic
- Physical state: Liquid
Radiolabelling:
not specified
Oxygen conditions:
other: estimated
Soil classification:
not specified
Parameter followed for biodegradation estimation:
test mat. analysis
Key result
Soil No.:
#1
% Degr.:
50
Parameter:
other: Half-life
Sampling time:
30 d
Remarks on result:
other: Other details not known
Key result
Soil No.:
#1
Half-life:
30 d
Type:
other: estimated data
Temp.:
25 °C
Remarks on result:
other: Other details not known
Transformation products:
not specified
Evaporation of parent compound:
not specified
Volatile metabolites:
not specified
Residues:
not specified

Mass Amount

(percent)

Half-Life (hr)

Emissions (kg/hr)

Soil

73.6

720

1000

 

 

Fugacity(atm)

Reaction (kg/hr)

Advection (kg/hr)

Reaction (percent)

Advection (percent)

Soil

9.78e-009

818

0

27.3

0

Conclusions:
Biodegradation half-life of test substance 2-isopropyl-5-methylcyclohexanone in soil was estimated to be 30 days (720 hrs)
Executive summary:

The half-life period of 2 -isopropyl-5 -methylcyclohexanone (CAS No. 1074 -95 -9) in soil was estimated using Level III Fugacity Model by EPI Suite version 4.1 estimation database (EPI suite, 2017). If released into the environment, 73.8% of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of 2 -isopropyl-5 -methylcyclohexanone in soil is estimated to be 30 days (720 hrs). Based on this half-life value of 2 -isopropyl-5 -methylcyclohexanone, 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.

Description of key information

The half-life period of 2 -isopropyl-5 -methylcyclohexanone (CAS No. 1074 -95 -9) in soil was estimated using Level III Fugacity Model by EPI Suite version 4.1 estimation database (EPI suite, 2017). If released into the environment, 73.8% of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of 2 -isopropyl-5 -methylcyclohexanone in soil is estimated to be 30 days (720 hrs). Based on this half-life value of 2 -isopropyl-5 -methylcyclohexanone, 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:
30 d
at the temperature of:
25 °C

Additional information

The half-life period of 2 -isopropyl-5 -methylcyclohexanone (CAS No. 1074 -95 -9) in soil was estimated using Level III Fugacity Model by EPI Suite version 4.1 estimation database (EPI suite, 2017). If released into the environment, 73.8% of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of 2 -isopropyl-5 -methylcyclohexanone in soil is estimated to be 30 days (720 hrs). Based on this half-life value of 2 -isopropyl-5 -methylcyclohexanone, 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.