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Environmental fate & pathways

Biodegradation in soil

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Reference
Endpoint:
biodegradation in soil
Type of information:
calculation (if not (Q)SAR)
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
Qualifier:
according to
Guideline:
other: Modelling database
Principles of method if other than guideline:
PBT profiler database & Fugacity Model by EPI Suite estimation database
GLP compliance:
not specified
Test type:
other: estimated data
Radiolabelling:
not specified
Oxygen conditions:
other: estimated data
Soil classification:
not specified
Soil No.:
#1
Duration:
30 d
Parameter followed for biodegradation estimation:
test mat. analysis
Key result
Soil No.:
#1
% Degr.:
50
Parameter:
other: half life
Sampling time:
120 d
Remarks on result:
other: Other details not known
Key result
Soil No.:
#1
DT50:
120 d
Type:
other: Estimation
Temp.:
25 °C
Remarks on result:
other: 120 days = 2880hrs.
Transformation products:
not specified
Evaporation of parent compound:
not specified
Volatile metabolites:
not specified
Residues:
not specified

 EPI Suite

 

Mass Amount (percent)

Half-Life (hr)

Emissions (kg/hr)

Soil

84.7

2.88e+003

1000

 

 

Fugacity (atm)

Reaction (kg/hr)

Advection (kg/hr)

Reaction (percent)

Advection (percent)

soil

1.28e-016

998

0

33.3

0

 

Conclusions:
Biodegradation half-life of test substance 4-(Phenylazo)benzene-1,3-diamine in soil was estimated to be 120 days (2800 hrs).
Executive summary:

The half-life period of 4-(phenylazo)benzene-1,3-diamine (CAS No. 495 -54 -5) 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, 33.3% of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of 4-(Phenylazo)benzene-1,3-diamine in soil is estimated to be 120 days (2880 hrs). Based on this half-life value of 4-(Phenylazo)benzene-1,3-diamine, 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

Biodegradation half-life of test substance 4-(Phenylazo)benzene-1,3-diamine in soil was estimated to be 120 days (2800 hrs).

Key value for chemical safety assessment

Half-life in soil:
120 d
at the temperature of:
25 °C

Additional information

The half-life period of4-(phenylazo)benzene-1,3-diamine(CAS No. 495 -54 -5) 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, 33.3% of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of4-(Phenylazo)benzene-1,3-diaminein soil is estimated to be 120 days (2880 hrs). Based on this half-life value of4-(Phenylazo)benzene-1,3-diamine, 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.