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Administrative data

Hazard for aquatic organisms

Hazard for air

Hazard for terrestrial organisms

Hazard for predators

Additional information

PNECs were derived for freshwater, saltwater, sediment, and soil using the equation underlying the Petrotox model or equilibrium partitioning calculations.

Conclusion on classification

Data on the acute aquatic toxicity of one member of this category (68476 -55 -1) was obtained from a proprietary source. No data was identified in the published literature. The data from this stream has been read across to the other category members.

The studies were conducted to standard guidelines and according to GLP and so are considered fully reliable for use as key studies. The authors report the results based both on nominal loading rates (WAF) and mean measured concentrations. As the test substance is a hydrocarbon stream with various components reporting a measured concentration could be misleading as the measured concentration does not relate to a concentration of the raw stream. Instead, we have used the results reported as WAF, which better represent the potential toxicity of the test substance. Algae were found to be less sensitive than either invertebrates or fish which had similar sensitivity to the test substance (EL50 6.96 mg/l WAF and LL50 14.1 mg/l WAF respectively).

WAF data can be used for comparison with the criteria for environmental classification under both the DSD and CLP Regulations. However, its use must be considered carefully. Based on the available data (48 hour EL50 6.96mg/l WAF) streams in this category should have the classification R51/53 under the DSD and Chronic 2 under the CLP regulations.

The partition coefficient of streams in this category ranges from 2.2 -5 and they have not been shown to be readily biodegradable. Therefore, the classifications cannot be removed.

Conclusion

Based on the available experimental data (48 hour EC50 6.96mg/l WAF) streams in this category should have the classification R51/53 under the DSD and Chronic 2 under the CLP regulations.

However, the classification of streams in this category may be impacted by other constituents. Components which may impact the classification (i.e. those that are R50/53) should be identified by the registrants and the impact of their environmental classification included in the assessment. The classification of each stream can be determined following the equations given in the notes below. 

Note: 

Under the DSD

R50/53 applies if sum of components with R50/53 is >25%.

R51/53 applies if sum of components with R51/53 is >25% or if sum of components with R50/53 is >2.5%.

R52/53 applies if sum of components with R52/53 is >25% or if sum of components with R51/53 is >2.5% or if sum of components with R50/53 is >0.25%.

Under the CLP Regulations

Acute 1 applies if sum of components with acute 1 is >25%.

Chronic 1 applies if sum of components with chronic 1 is >25%.

Chronic 2 applies if sum of components with chronic 1 multiplied by 10 plus the sum of components with chronic 2 is >25%.

Chronic 3 applies if sum of components with chronic 1 multiplied by 100 plus the sum of components with chronic 2 multiplied by 10 plus the sum of components with chronic 3 is >25%.

Chronic 4 applies is sum of components with chronic 1, 2, 3 and 4 is >25%.

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