Reaction mass of m-terphenyl and o-terphenyl

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

PNEC aqua (freshwater)

PNEC value:

0.007 µg/L

Assessment factor:

1 000

Extrapolation method:

assessment factor

PNEC freshwater (intermittent releases):

0.067 µg/L

Marine water

Hazard assessment conclusion:

PNEC aqua (marine water)

PNEC value:

0.001 µg/L

Assessment factor:

10 000

Extrapolation method:

assessment factor

STP

Hazard assessment conclusion:

PNEC STP

PNEC value:

8.025 mg/L

Assessment factor:

10

Extrapolation method:

assessment factor

Sediment (freshwater)

Hazard assessment conclusion:

PNEC sediment (freshwater)

PNEC value:

0.122 mg/kg sediment dw

Extrapolation method:

equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:

PNEC sediment (marine water)

PNEC value:

0.012 µg/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:

0.024 mg/kg soil dw

Extrapolation method:

equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

PNEC oral

PNEC value:

6.67 mg/kg food

Assessment factor:

300

Additional information

Available toxicity information relevant for risk assessment (PNEC) purposes:

 

Acute toxicity info:

-  Fish: There is one short-term toxicity tests available which indicates that there is no toxicity below water solubility levels: LC50 (96h) > 6.7 µg/L

- Invertebrates: There is test available in Dahpnia magna. A preliminary media preparation trial indicated that a dissolved test item concentration of approximately 0.062 mg/L was obtained from a saturated solution method of preparation indicating this to be the limit of water solubility of this test item under test conditions. This experimental design conforms to a "Limit test" to confirm that at highest attainable test concentration, no immobilization or adverse reactions to exposure were observed. There is no toxicity below water solubility levels. A NOEC(48 h) of 0.0096 mg/L and an EC50 of > 0.0096 mg/L were determined.

- Algae: There is a test available. The key study was performed on a saturated solution and no toxicity was observed in the highest loading. It was not possible to calculate ErC20 or ErC50 values as at the maximum attainable test concentration of 0.027 mg/L, no more than 18% inhibition of growth rate occurred.

 

Conclusion acute toxicity results:

There is no toxicity below water solubility levels and fish are the most sensitive organisms.

 

Chronic toxicity info:

- Fish: No chronic fish tests available on Reaction mass of m-terphenyl and o-terphenyl.

- Invertebrates: No chronic fish tests available on Reaction mass of m-terphenyl and o-terphenyl.

- Algae: No chronic fish tests available on Reaction mass of m-terphenyl and o-terphenyl.

 

Conclusion chronic toxicity results:

There is no long-term toxicity test available.

 

Determination of the starting point for the PNEC derivation:

 

·      Available data:

o  Acute: 3 trophic levels

o  Chronic: no trophic levels

·      Lowest toxicity result: short-term fish (96h) LC50 > 0.0067. Therefore, 0.0067 mg/L is used as start value.

Conclusion on classification

Currently, the acute aquatic toxicity data indicate that there is no toxicity up to water solubility levels. In addition, the substance should be considered as not readily biodegradable and there is potential for bioaccumulation.

According to the available data and the CLP classification (EC No 1272/2008), the substance is classified as Aquatic acute 1 and Aquatic chronic 1.