Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

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.