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Link to relevant study record(s)

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
Reference:
Composition 0
Qualifier:
according to
Guideline:
other: Modeling database
Principles of method if other than guideline:
Fugacity Model by EPI Suite estimation database.
GLP compliance:
not specified
Test material information:
Composition 1
Radiolabelling:
not specified
Oxygen conditions:
other: estimation
Inoculum or test system:
not specified
Parameter followed for biodegradation estimation:
test mat. analysis
Compartment:
other: water, material (mass) balance
% Recovery:
14.9
Compartment:
other: sediment, material (mass) balance
% Recovery:
0.155
% Degr.:
50
Parameter:
other: Half life in water
Sampling time:
37.5 d
Remarks on result:
other: Other details not known.
% Degr.:
50
Parameter:
other: Half-life in sediment
Sampling time:
337.5 d
Remarks on result:
other: Other details not known.
Compartment:
water
Half-life:
37.5 d
Type:
other: estimation
Temp.:
25 °C
Remarks on result:
other: Other details not known.
Compartment:
sediment
Half-life:
337.5 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

14.9

900

1000

Sediment

0.155

8.1e+003

0

 

 

Fugacity

(atm)

Reaction

(kg/hr)

Advection

(kg/hr)

Reaction

(percent)

Advection

(percent)

Water

1.47e-018

583

757

19.4

25.2

Sediment

1.48e-018

0.674

0.158

0.0225

0.00525

Validity criteria fulfilled:
not specified
Conclusions:
Estimated half life of (5Or8)-aminonaphthalene-2-sulphonic acid in water was 37.5 days (900 h) and in sediment estimated to be 337.5 days (8100 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 (5Or8)-aminonaphthalene-2-sulphonic acid (CAS No. 51548 -48 -2). Half-life of (5Or8)-aminonaphthalene-2-sulphonic acid in water is estimated to be 37.5 days (900 hrs) while in sediment it is 337.5 days (8100 hrs). Based on these half-life value of (5Or8)-aminonaphthalene-2-sulphonic acid, it is concluded that the chemical is not persistent in water while it is persistent in sediment.

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 (5Or8)-aminonaphthalene-2-sulphonic acid (CAS No. 51548 -48 -2). Half-life of (5Or8)-aminonaphthalene-2-sulphonic acid in water is estimated to be 37.5 days (900 hrs) while in sediment it is 337.5 days (8100 hrs). Based on these half-life value of (5Or8)-aminonaphthalene-2-sulphonic acid, it is concluded that the chemical is not persistent in water while it is persistent in sediment.

Key value for chemical safety assessment

Half-life in water:
37.5 d
at the temperature of:
25 °C
Half-life in sediment:
337.5 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 (5Or8)-aminonaphthalene-2-sulphonic acid(CAS No. 51548 -48 -2). Half-life of (5Or8)-aminonaphthalene-2-sulphonic acidin water is estimated to be 37.5 days (900 hrs) while in sediment it is 337.5 days (8100 hrs). Based on these half-life value of (5Or8)-aminonaphthalene-2-sulphonic acid, it is concluded that the chemical is not persistent in water while it is persistent in sediment.