disodium 4-amino-6-((4-((4-(2,4-diaminophenyl)azo)phenylsulfamoyl)phenyl)azo)-5-hydroxy-3-((4-nitrophenyl)azo)naphthalene-2,7-disulfonate

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

PNEC aqua (freshwater)

PNEC value:

25 µg/L

Assessment factor:

100

Extrapolation method:

assessment factor

PNEC freshwater (intermittent releases):

1.2 mg/L

Marine water

Hazard assessment conclusion:

PNEC aqua (marine water)

PNEC value:

2.5 µg/L

Assessment factor:

1 000

Extrapolation method:

assessment factor

PNEC marine water (intermittent releases):

0.12 mg/L

STP

Hazard assessment conclusion:

PNEC STP

PNEC value:

1 mg/L

Assessment factor:

100

Extrapolation method:

assessment factor

Sediment (freshwater)

Hazard assessment conclusion:

PNEC sediment (freshwater)

PNEC value:

92.7 µg/kg sediment dw

Extrapolation method:

equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:

PNEC sediment (marine water)

PNEC value:

9.27 µg/kg sediment dw

Extrapolation method:

equilibrium partitioning method

Hazard for air

Air

Hazard assessment conclusion:

no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:

PNEC soil

PNEC value:

3.88 µg/kg soil dw

Extrapolation method:

equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential to cause toxic effects if accumulated (in higher organisms) via the food chain

Additional information

PNEC sediment using Equilibrium Partitioning Method:

The following formula is applied:

PNEC_sed= K_susp-water/RHO_susp*PNEC_water*1000

Where:

PNECwater	Predicted No Effect Concentration in water	[mg.l-1]	0,025
RHOsusp	bulk density of wet suspended matter	[kg.m-3]	1150
Ksusp water	partition coefficient suspended matter water	[m3.m-3]	0,927
PNECsed	Predicted No Effect Concentration in sediment	[mg.kg-1of wet sediment]

 

K_{susp water}= Fwater_susp+ Fsolid_susp*Kp_susp/1000*RHO_solid

 

Kp_susp= Foc_susp*Koc

Therefore PNEC sediments = 0,927*0,025*1000/1150 = 20.2 ug/kg = 92.7 ug/kg dw

The value of Ksusp-water of 0,927 is consistent with the calculated value with EUSES 2.2.0. The tool gives 0,927 putting a Koc QSAR for organic acids 1.1 as measured

 

PNEC marine sediment using Equilibrium Partitioning Method:

Being marine PNEC usually derived by freshwater PNEC with an adding assessment factor of 10, consequently the marine sediment PNEC can be directly derived from PNEC sediment with an assessment factor of 10.

Therefore PNEC marine sediments = 20,2*0,1 = 2.02 ug/kg = 9.27 ug/kg dw

 

PNEC soil using Equilibrium Partitioning Method:

Results with EUSES 2.2.0 for Ksoil-water: 0.228 – 0.307

The following formula is applied:

PNEC_soil= K_soil-water/RHO_soil*PNEC_water*1000

Where:

ECwater	Predicted No Effect Concentration in water	[mg.l-1]	0,025
RHOsoil	bulk density of soil	[kg.m-3]	1701
Ksoil water	partition coefficient soil water	[m3.m-3]	0,233
PNECsoil	Predicted No Effect Concentration in soil	[mg.kg-1]

  

K_{soil water}= Fair_soil*K_air-waterl+Fwater_soil+ Fsolid_soil*Kp_soil/1000*RHO_solid

K_{soil water}= Fair_soil*K_air-waterl+Fwater_soil+ Fsolid_soil*Kp_soil/1000*RHO_solid

Kp_soil= Foc_soil*Koc

Therefore PNEC soil = 0,233/1701*0,025*1000= 3.43 ug/kg ww = 3.88 ug/kg dw

 

Conclusion on classification

No classification is warranted under EC 1272/2008. For details refer to the section 6.1: Aquatic toxicity summary.