Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.47 µg/L
Assessment factor:
100
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
0.003 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.47 µg/L
Assessment factor:
100
Extrapolation method:
assessment factor

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
1.9 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:
0.11 µg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Justification for PNEC sediment derivation
Freshwater
PNECsediment= (0.783 + 0.0217× Koc) × PNECwater
(Guidance on information requirements and chemical assessment, Part B: Hazard Assessment, B.7.2.4.)
 PNECwater= 0.47µg/dm3;
Koc= 4
PNECsediment freshwater= (0.783 + 0.0217× 4) × 0.47 = 0,4 µg/kg X4,6=1,9  µg/kg sed dw
 Marinewater

PNECsediment= (0.783 + 0.0217× Koc) × PNECwater marine

(Guidance on information requirements and chemical assessment, Part B: Hazard Assessment, B.7.2.4.)

 PNECmarinewater= 0.47µg/dm3;

Koc= 4

PNECsediment freshwater= (0.783 + 0.0217× 4) × 0.47 = 0,4 µg/kg X4,6=1,9  µg/kg sed dw

Justification for PNEC soil derivation
PNECsoil= (0,174 + 0.0104× Koc) × PNECwater
(Guidance on information requirements and chemical assessment, Part B: Hazard Assessment, B.7.2.4.)
 PNECwate rmarine= 0.47µg/dm3;
Koc= 4
PNECsoil= (0.174 + 0.0104× 4) × 0.47 = 0.1 µg/kg x 1.13= 0.11 µg/kg sediment dw

 

Justification for PNEC secondary poisoning derivation

No data available.

The substance is readily biodegradable.

The substance does not bio-accumulate.

 

Sodium ethyl xanthate (CAS# 140-90-9) does not fulfill the bioaccumulation criterion, the bio-concentration factor (BCF = 3.2) is much lower than 2000 (REACH Regulation Annex XIII)


Environmental classification justification:

The results from the aquatic toxicity studies are as follows:

LC50 for freshwater fish: 0.01 mg/L

 

Daphnia magna:EC10 (21 d): 0.047 mg/L test mat. (nominal) based on: reproduction test

 

EC10/LC10 or NOEC for freshwater plants: 1.9 mg/L

EC50/LC50 for freshwater algae: 0.325 mg/L

EC50 (3 h): 220.4 mg/L based on: respiration rate

OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test)

Conclusion on classification