Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.015 mg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor

Marine water

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

STP

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

Sediment (freshwater)

Hazard assessment conclusion:
no hazard identified

Sediment (marine water)

Hazard assessment conclusion:
no hazard identified

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
0.05 mg/kg soil dw
Extrapolation method:
assessment factor

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

1,4 -Butynediol (B3D) is not classified as hazardous to the aquatic environment according to the criteria laid out in Regulation (EC) 1272/2008 or in Directive 67/548/EEC based on a 48 hour EC50 in invertebrates (Daphnia magna) of 26.8 mg/L (BASF, 1987), a 96 hour LC50 in freshwater fish (Pimephales promelas) of 53.6 mg/L (Veith, et. al., 1989), a 21-day NOEC of 15 mg/L (Daphnia magna), a LogKow of -0.73, and a BCF of 3.16 L/kg.