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Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
no hazard identified

Marine water

Hazard assessment conclusion:
no hazard identified

STP

Hazard assessment conclusion:
no hazard identified

Sediment (freshwater)

Hazard assessment conclusion:
no data available: testing technically not feasible

Sediment (marine water)

Hazard assessment conclusion:
no data available: testing technically not feasible

Hazard for air

Air

Hazard assessment conclusion:
hazard related to composition of atmosphere identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no hazard identified

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

The substances in the category are gases and will predominantly partition to the atmosphere, which will limit the aquatic toxicity. Due to the difficulty associated with conducting aquatic toxicity tests, experimental data were available for only one member of this category: Benzene (CAS 71-43-2). The lowest acute and chronic toxicity values for benzene are a 96-hour LC50 for Oncorhynchus mykiss of 5.3 mg/L and a 32-day NOEC for Pimephales promelas of 0.8 mg/L.

In the absence of measured data, ECOSAR QSAR (Program v1.00 in EPI Suite v4.00) data was also considered for CLP for the Lead Registrant samples when no experimental data for a stream was available. The predicted LL50 values range from 6.97 mg/L to 623 mg/L for the different aquatic taxonomic groups. The predicted EL10 from 0.834 mg/L to 51.5 mg/L for the different aquatic taxonomic groups.

Based on the available experimental and predicted acute toxicity data of the representative constituents of these streams, according to Table 4.1.0 (a) of CLP Regulations, the streams in this category would not warrant the classification as Acute Aquatic 1 (H400).

Based on the predicted chronic toxicity data of the representative constituents of these streams, according to Table 4.1.0 (b)(i) of CLP Regulations the streams in this category would warrant the classification of Chronic Category 3 (H412).

Based on acute and chronic aquatic classifications of the constituents of these streams and Classification Criteria for Mixtures, as laid down in CLP Regulations, some of the streams in this category do not require Aquatic Chronic classification. Other streams should have a minimum classification of Chronic Category 3 (H412) or a Chronic Aquatic 2 (H411).

Conclusion

Based on acute and chronic aquatic classifications of the constituents of these streams and Classification Criteria for Mixtures, as laid down in CLP Regulations, some of the streams in this category do not require Aquatic Chronic classification. Other streams should have a classification of Chronic Category 3 (H412) or a Chronic Aquatic 2 (H411).

Note:

Under the CLP Regulations

Acute 1 applies where: Acute 1 x M ≥ 25 %

Chronic 1 applies where: Chronic 1 × M ≥ 25 %

Chronic 2 applies where: (M × 10 × Chronic 1) + Chronic 2 ≥ 25 %

Chronic 3 applies where: (M × 100 × Chronic 1) + (10 × Chronic 2) + Chronic 3 ≥ 25 %

Chronic 4 applies where: Chronic 1 + Chronic 2 + Chronic 3 + Chronic 4 ≥ 25 %