Salicylaldehyde

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

PNEC aqua (freshwater)

PNEC value:

2.3 µg/L

Assessment factor:

1 000

Extrapolation method:

assessment factor

PNEC freshwater (intermittent releases):

23 µg/L

Marine water

Hazard assessment conclusion:

PNEC aqua (marine water)

PNEC value:

0.23 µg/L

Assessment factor:

10 000

Extrapolation method:

assessment factor

PNEC marine water (intermittent releases):

2.3 µg/L

STP

Hazard assessment conclusion:

PNEC STP

PNEC value:

0.93 mg/L

Assessment factor:

10

Extrapolation method:

assessment factor

Sediment (freshwater)

Hazard assessment conclusion:

PNEC sediment (freshwater)

PNEC value:

0.017 mg/kg sediment dw

Extrapolation method:

equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:

PNEC sediment (marine water)

PNEC value:

0.002 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:

0.002 mg/kg soil dw

Extrapolation method:

equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential for bioaccumulation

Additional information

Aquatic toxicity:

Valid acute studies based on international guidelines are available for the three aquatic trophic levels (algae, aquatic invertebrates and fish). Among all data available, a toxic effect was observed for the three aquatic trophic levels:

- For the algae Pseudokirchneriella subcapitata, the 72h-ErC50 and 72h-NOEC values based on growth rate were determined to be 4.8 mg/L and 0.55 mg/L, respectively, based on geometric mean measured concentrations. 

- For the aquatic invertebrates Daphnia magna, the 48h-EC50 value was determined to be 2.6 mg/L based on geometric mean concentrations.

- The fish, Pimephales promelas, is the most sensitive species with a 96h-LC50 value at 2.3 mg/L based on measured concentrations.

In addition, the test item was toxic to activated sludge of a municipal sewage treatment plan with 3h-EC₅₀ and 3h-EC₁₀ values determined to be 52 mg/L and 9.3 mg/L, respectively, based on nominal concentrations. 

Sediment, terrestrial toxicity and hazard for predators:

In the absence of any ecotoxicological data for sediment-dwelling/soil organisms, the PNEC sediment/soil were calculated using the equilibrium partitioning method (EPM). Furthermore, the PNECoral was not derived as there is a low potential of bioaccumulation.

Environmental fate and pathways:

The registered substance is not readily biodegradable but a total prtimary biodegradation is demonstrate as the substance is totally converted to a transformation product. This transformation product is readily biodegradable, therefore the registered substance can not be considered as potential Persistent (P) or very Persistent (vP) in the environment.

Also, the registered substance is considered highly mobile in soils with a log Koc value at 1.57 (Koc = 37L/kg), and with a log Kow value at 1.66, the substance is not considered to be bioaccumulative according to CLP (< 4.0) and PBT criteria (< 4.5). 

Conclusion on classification

No harmonised classification is available on the registered substance.

1 < lowest E(L)C50 value < 10 mg/L; not readily biodegradable; log Kow = 1.66

Classification according to the Annex VI of the Regulation (EC) No 1272/2008 (CLP): The registered substance is classified as Aquatic Chronic 2 for the environment, without M-factor.