Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

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

Marine water

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

STP

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

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.029 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:
0.036 mg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

The PNECoral for the evaluation of secondary poisoning was not calculated, based on the waiver described by ECHA (Section B.7.2.7 of Part B, Hazard assessment, of Guidance on information requirements and chemical safety assessment, May 2008, pp. 45-47) and the assessment whether the exposure route of secondary poisoning is relevant (Section R.16.5.7.2, Chapter 16 “Environmental Exposure Estimation”, of Guidance on information requirements and chemical safety assessment, May 2008, pp. 93-94).

Conclusion on classification

The substance has a low potential to cause toxic effects if accumulated in higher organisms, as described by ECHA (Section R.16.5.7.2, Chapter 16 “Environmental Exposure Estimation”, of Guidance on information requirements and chemical safety assessment, May 2008, pp. 93-94).

The most sensitive species was fish. The LC50 of 36 mg/L. This value is used to derive the PNECs.

The substance is not readily biodegradable. The log Kow of the substance is 2.8. Thus, the bioaccumulation criterion (log Kow <3) is not fulfilled.

Overall, 2,4,7,9-Tetramethyl-5-decyne-4,7-diol, ethoxylated (1.3) is not classified for acute aquatic toxicity and classified as Aquatic Chronic 3 (H412: Harmful to aquatic life with long lasting effects) based on the LC50 of 36 mg/L in fish and the substance being not readily biodegradable in accordance with Regulation EC No 1272/2008.