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Environmental fate & pathways

Biodegradation in soil

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Reference
Endpoint:
biodegradation in soil: simulation testing
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:
no guideline available
Principles of method if other than guideline:
Fugacity Model by EPI Suite estimation database
GLP compliance:
not specified
Test type:
other: Estimated
Specific details on test material used for the study:
CAS number: 842-07-9
EC number: 212-668-2
- Name of test material (as cited in study report): 2-Naphthalenol, 1-(phenylazo)-
- Molecular formula (if other than submission substance): C16H12N2O
- Molecular weight (if other than submission substance): 248.284 g/mol
- Smiles notation (if other than submission substance): c12c(\N=N\c3ccccc3)c(ccc1cccc2)O
- InChI: 1S/C16H12N2O/c19-15-11-10-12-6-4-5-9-14(12)16(15)18-17-13-7-2-1-3-8-13/h1-11,19H/b18-17+
- Substance type: Organic
- Physical state: Solid
Radiolabelling:
not specified
Oxygen conditions:
other: estimated
Soil classification:
not specified
Parameter followed for biodegradation estimation:
other: Calculated data
Key result
Soil No.:
#1
% Degr.:
50
Parameter:
other: Half-life
Sampling time:
75 d
Remarks on result:
other: Other details not known
Key result
Soil No.:
#1
DT50:
75 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

70.4

1.8e+003

1000

 

 

Fugacity(atm)

Reaction (kg/hr)

Advection (kg/hr)

Reaction (percent)

Advection (percent)

Soil

1.13e-016

1.89e+003

0

63.1

0

Conclusions:
Biodegradation half-life of test substance 1-phenylazo-2-naphthol (C.I. Solvent Yellow 14) in soil was estimated to be 75 days (1800 hrs).
Executive summary:

The half-life period of 1-phenylazo-2-naphthol (C.I. Solvent Yellow 14) (CAS No. 842 -07 -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, 70.4% of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of C.I. Solvent Yellow 14 in soil is estimated to be 75 days (1800 hrs). Based on this half-life value of1-phenylazo-2-naphthol (C.I. Solvent Yellow 14), 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 of1-phenylazo-2-naphthol (C.I. Solvent Yellow 14) (CAS No. 842 -07 -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, 70.4% of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of C.I. Solvent Yellow 14 in soil is estimated to be 75 days (1800 hrs). Based on this half-life value of1-phenylazo-2-naphthol (C.I. Solvent Yellow 14), 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:
75 d
at the temperature of:
25 °C

Additional information

The half-life period of1-phenylazo-2-naphthol (C.I. Solvent Yellow 14) (CAS No. 842 -07 -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, 70.4% of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of C.I. Solvent Yellow 14 in soil is estimated to be 75 days (1800 hrs). Based on this half-life value of 1-phenylazo-2-naphthol (C.I. Solvent Yellow 14), 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.