3-chloropropene

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

PNEC aqua (freshwater)

PNEC value:

0.001 mg/L

Assessment factor:

1 000

Extrapolation method:

assessment factor

PNEC freshwater (intermittent releases):

0.012 mg/L

Marine water

Hazard assessment conclusion:

PNEC aqua (marine water)

PNEC value:

0 mg/L

Assessment factor:

10 000

Extrapolation method:

assessment factor

STP

Hazard assessment conclusion:

PNEC STP

PNEC value:

120 mg/L

Assessment factor:

1

Extrapolation method:

assessment factor

Sediment (freshwater)

Hazard assessment conclusion:

PNEC sediment (freshwater)

PNEC value:

0.01 mg/kg sediment dw

Assessment factor:

1

Extrapolation method:

equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:

PNEC sediment (marine water)

PNEC value:

0.001 mg/kg sediment dw

Assessment factor:

1

Extrapolation method:

equilibrium partitioning method

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:

PNEC soil

PNEC value:

0.001 mg/kg soil dw

Assessment factor:

1

Extrapolation method:

equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential for bioaccumulation

Additional information

Information about the ecotoxicological effects of 3-chloropropene in the aquatic environment is available from a number of short-term tests in species from different trophic levels. Short-term toxicity threshold values are available from three trophic levels: a test in fish over 14 days resulted in a LC50 value of 1.2 mg/L, a 48-hour short-term test in Daphnia magna had a LC50 value of 250 mg/L and the 8-day long-term study in algae produced a NOEC-values of 6.3 mg/L. Another short-term toxicity test was performed with 3-4 week old larvae of Xenopus laevis and the LC50 value after 48 hours was 0.34 mg/L. The study was done in properly closed all-glass vessels. However, the study was carried out only once with no replicates and no control groups and the LC50 value was based on nominal concentrations in mixtures. Although the study in Xenopus laevis was rated as reliable with restrictions in the OECD SIDS dossier, its results cannot be regarded as fully reliable and should not be considered in the decision on environmental classification.

The substance 3-chloropropene was characterised as readily biodegradable in a modified standard MITI test. The octanol-water partition coefficient was predicted to be low on the basis of the chemical structure of 3-chloropropene. The experimental bioconcentration factor was determined in accordance with OECD Guideline 305C and was below 5.6 indicating that the substance has no potential for bioaccumulation.

According to the criteria defined in the Regulation (EC) 1272/2008, substances with long-term NOECs >1 mg/L are considered as not hazardous to the aquatic environment. 3-chloropropene has long-term NOECs of 1.2 mg/L in fish and 6.3 in algae. In addition, the substance is readily biodegradable and has no potential for bioaccumulation. On the other hand, 3-chloropropene by biotic and abiotic processes may be degraded to allyl alcohol, which falls into the Acute Aquatic Category 1 according to Annex VI of the CLP Regulation (EC) 1272/2008. It is thus proposed to classify 3-chloropropene with the Acute Aquatic Category 1 and the Hazard statement H 400.

Conclusion on classification

The substance 3-chloropropene in the environment may be degraded into allyl alcohol, which falls into the Acute Aquatic Category 1 according to the CLP regulation. It is proposed to classify 3-chloropropene accordingly. The substance thus falls into the Acute Aquatic Category 1 and requires the Hazard statement H 400.