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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 predictive model developed by US EPA.
Qualifier:
no guideline available
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: estimation
Soil classification:
not specified
Parameter followed for biodegradation estimation:
other: Calculated data
Soil No.:
#1
% Recovery:
78.7
Remarks on result:
other: Other details not known
Key result
Soil No.:
#1
% Degr.:
50
Parameter:
other: Half life
Sampling time:
75 d
Remarks on result:
other: 75 days = 1800 hrs.
Key result
Soil No.:
#1
DT50:
75 d
Type:
other: estimated data
Temp.:
25 °C
Remarks on result:
other: 75 days = 1800 hrs.
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

78.7

1.8e+003

1000

 

 

Fugacity

(atm)

Reaction

(kg/hr)

Advection

(kg/hr)

Reaction

(percent)

Advection

(percent)

Soil

6.09e-013

1.3e+003

0

43.2

0

Conclusions:
Based on the Estimation Programs Interface Suite (EPI Suite, 2017) prediction model, the half-life period in soil for the test substance 2-chloro-p- phenylenediamine (CAS No.615-66-7) is estimated. The half-life period of 2-chloro-p-phenylenediamine in soil is calculated as 75 days (1800 hours).
Executive summary:

Based on the Estimation Programs Interface Suite (EPI Suite, 2017) prediction model, the half-life period in soil for the test substance 2-chloro-p-phenylene diamine (CAS No.615-66-7) is estimated. If released into the environment,78.7% of the chemical will be partitioning into the soil according to the Mackay Level III Fugacity Model having an estimated half-life period of 75 days (1800 hrs.). Based on this half-life it is considered that the substance will qualify as not persistent as the half-life does not exceed the threshold of 120 days (to qualify the chemical as persistent in soil medium) as per Annex XIII of Reach regulation and also it is considered that the exposure risk to soil dwelling animals is moderate to low.

Description of key information

Based on the Estimation Programs Interface Suite (EPI Suite, 2017) prediction model, the half-life period in soil for the test substance 2-chloro-p-phenylene diamine (CAS No.615-66-7) is estimated. The half-life period of 2-chloro-p-phenylenediamine in soil is calculated as 75 days (1800 hours). Based on this half-life it is considered that the substance will qualify as not persistent as the half-life does not exceed the threshold of 120 days (to qualify the chemical as persistent in soil medium) as per Annex XIII of Reach regulation.

Key value for chemical safety assessment

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

Additional information

Based on the Estimation Programs Interface Suite (EPI Suite, 2017) prediction model, the half-life period in soil for the test substance 2-chloro-p-phenylenedi amine (CAS No.615-66-7) is estimated. If released into the environment,78.7% of the chemical will be partitioning into the soil according to the Mackay Level III Fugacity Model having an estimated half-life period of 75 days (1800 hrs.). Based on this half-life it is considered that the substance will qualify as not persistent as the half-life does not exceed the threshold of 120 days (to qualify the chemical as persistent in soil medium) as per Annex XIII of Reach regulation and also it is considered that the exposure risk to soil dwelling animals is moderate to low.