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REACH

Tetrasodium 5-[[2,4-dihydroxy-5-[[4-[(4-nitro-2-sulphonatophenyl)amino]phenyl]azo]phenyl]azo]-4-hydroxy-3-[[4-[(4-nitro-2-sulphonatophenyl)amino]phenyl]azo]naphthalene-2,7-disulphonate

EC number: 274-430-4 | CAS number: 70210-34-3

Life Cycle description
Uses advised against

Ecotoxicological information

Ecotoxicological Summary

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:: PNEC aqua (freshwater)
PNEC value:: 0.013 mg/L
Assessment factor:: 1 000
Extrapolation method:: assessment factor
PNEC freshwater (intermittent releases):: 0.128 mg/L

Marine water

Hazard assessment conclusion:: PNEC aqua (marine water)
PNEC value:: 0.001 mg/L
Assessment factor:: 10 000
Extrapolation method:: assessment factor

STP

Hazard assessment conclusion:: PNEC STP
PNEC value:: 10 mg/L
Assessment factor:: 100
Extrapolation method:: assessment factor

Sediment (freshwater)

Hazard assessment conclusion:: PNEC sediment (freshwater)
PNEC value:: 0.065 mg/kg sediment dw
Extrapolation method:: equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:: PNEC sediment (marine water)
PNEC value:: 0.006 mg/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:: 0.005 mg/kg soil dw
Extrapolation method:: equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:: no potential for bioaccumulation

Additional information

PNEC sediment using Equilibrium Partitioning Method:

The following formula is applied:

PNEC_sed= K_susp-water_p*PNEC_water*1000/RHO_sus

Where:

PNECwater	Predicted No Effect Concentration in water	[mg.l-1]	0.0128
RHOsusp	bulk density of wet suspended matter	[kg.m-3]	1150
Ksusp water	partition coefficient suspended matter water	[m3.m-3]	1.27
PNECsed	Predicted No Effect Concentration in sediment	[mg.kg-1of wet sediment]	0.1413

Dry weight: 0.1413 * 4.6 = 0.065

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

Kp_susp= Foc_susp*Koc

The value of Ksusp-water of 0.979 is consistent with the calculated value with EUSES 2.1.1.

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 = 0.1413*0.1 = 0.001413 mg/kg.

Dry weight = 0.001413* 4.6 = 0.0065

PNEC soil using Equilibrium Partitioning Method:

The following formula is applied:

PNEC_soil= K_soil-water*PNEC_water*1000/RHO_soil

Where:

ECwater	Predicted No Effect Concentration in water	[mg.l-1]	0.0128
RHO_soil	bulk density of soil	[kg.m-3]	1700
Ksoil water	partition coefficient soil water	[m3.m-3]	0.65
PNECsoil	Predicted No Effect Concentration in soil	[mg.kg-1]	0.00489

Dry weight = 0.00489*1.13 = 0.0055

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

Kp_soil= Foc_soil*Koc

Conclusion on classification

Based on the results of the eco-tox tests, the substance needs to be classified as Aq. Chronic 3, H412 under Regulation 1272/2008 (CLP) since the tested item shows toxicity on daphnia with a EC50 (48h) = 31.6 mg/l and on algae with a IC50 (72h) = 12.8 mg/l

Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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