Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.005 mg/L
Assessment factor:
50
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
0.073 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.001 mg/L
Assessment factor:
500
Extrapolation method:
assessment factor

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.013 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:
0.023 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

Classification related key information

Log Kow: 2.5 (calculation)

Water solubility: >= 1700 mg/L (OECD 105)

Biodegradation: 7 % in 28 days (OECD 301D)

Bioaccumulation: low, since log Kow < 3

Aquatic acute toxicity:

For fish: 96h, LC50 (O. mykiss): 49 mg/L

For algae: 72h, ErL50 (S. subspicatus): 24 mg/L

For crustacea: 48h, EC50 (D. magna): 7.3 mg/L

Aquatic chronic toxicity:

For fish: not available

For algae: 72h, ErL10 (S. subspicatus): 10 mg/L

For crustacea: 21d, NOEC (D. magna): 0.26 mg/L, read across

Classification justification according to CLP

Based on the data above, Zinc O,O,O',O'-tetrabutyl bis(phosphorodithioate) (CAS 6990-43-8 ) is not considered to be rapidly degradable. The lowest acute aquatic toxicity L(E)C50 value is 7.3 mg/L. Valid chronic toxicity data are available for aquatic invertebrates and algae – the lowest NOEC value beeing 0.26 mg/L. Therefore, Zinc O,O,O',O'-tetrabutyl bis(phosphorodithioate) (CAS 6990-43-8 ) needs to be classified and labelled as chronic 2 for environmental hazards according to the Regulation (EC) No.1272/2008 (CLP) and the Regulation (EU) No. 286/2011 (2nd ATP).

Classification justification according to DSD

Based on the data above, Zinc O,O,O',O'-tetrabutyl bis(phosphorodithioate) (CAS 6990-43-8 ) is not rapidly degradable and is considered to have a low potential for accumulation. The lowest acute aquatic toxicity value is 7.2 mg/L. Therefore, Zinc O,O,O',O'-tetrabutyl bis(phosphorodithioate) (CAS 6990-43-8 ) has to be classified and labelled as environmental hazard R51/53 according to Directive 67/548/EEC.