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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Reference
Endpoint:
biodegradation in water and sediment: simulation tests
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: Modeling database
Principles of method if other than guideline:
Fugacity Model by EPI Suite estimation database
GLP compliance:
not specified
Radiolabelling:
not specified
Oxygen conditions:
other: estimation
Inoculum or test system:
not specified
Parameter followed for biodegradation estimation:
test mat. analysis
Reference substance:
not specified
Compartment:
other: water, material (mass) balance
% Recovery:
28.3
Compartment:
other: sediment, material (mass) balance
% Recovery:
0.18
% Degr.:
50
Parameter:
other: Half-life in water
Sampling time:
8.666 d
Remarks on result:
other: Other details not known
% Degr.:
50
Parameter:
other: Half-life in sediment
Sampling time:
77.91 d
Remarks on result:
other: Other details not known
Compartment:
water
DT50:
8.666 d
Type:
other: estimation
Temp.:
25 °C
Remarks on result:
other: Other details not known
Compartment:
sediment
DT50:
77.91 d
Type:
other: estimation
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)

Water

28.3

208

1000

Sediment

0.18

1.87e+003

0

 

Fugacity (atm)

Reaction (kg/hr)

Advection (kg/hr)

Reaction (percent)

Advection (percent)

Water

3.01e-010

757

227

25.2

7.58

Sediment

2.12e-010

0.536

0.029

0.0179

0.000965

Validity criteria fulfilled:
not specified
Conclusions:
Estimated half life of Hexylamine in water was 8.666 days (208 h) and in sediment estimated to be 77.91 days (1870 h).
Executive summary:

Estimation Programs Interface (EPI) Suite (2016) prediction model was run to predict the half-life in water and sediment for the test compound Hexylamine (CAS No. 111-26-2). If released in to the environment, 28.3 % of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period ofHexylaminein water is estimated to be 8.666 days (208 hrs) whereas the half-life period of Hexylamine in sediment is estimated to be 77.91 days (1870 hrs). These values indicate that Hexylamine is not persistent in nature.

Description of key information

Estimation Programs Interface (EPI) Suite (2016) prediction model was run to predict the half-life in water and sediment for the test compound Hexylamine (CAS No. 111-26-2). If released in to the environment, 28.3 % of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period ofHexylaminein water is estimated to be 8.666 days (208 hrs) whereas the half-life period of Hexylamine in sediment is estimated to be 77.91 days (1870 hrs). These values indicate that Hexylamine is not persistent in nature.

Key value for chemical safety assessment

Half-life in freshwater:
8.666 d
at the temperature of:
25 °C
Half-life in freshwater sediment:
77.91 d
at the temperature of:
25 °C

Additional information

Estimation Programs Interface (EPI) Suite (2016) prediction model was run to predict the half-life in water and sediment for the test compound Hexylamine (CAS No. 111-26-2). If released in to the environment, 28.3 % of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period ofHexylaminein water is estimated to be 8.666 days (208 hrs) whereas the half-life period of Hexylamine in sediment is estimated to be 77.91 days (1870 hrs). These values indicate that Hexylamine is not persistent in nature.