Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

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

Marine water

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

STP

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

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:
no hazard identified

Hazard for terrestrial organisms

Soil

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

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential to cause toxic effects if accumulated (in higher organisms) via the food chain

Additional information

The ecotoxicity of hydrocarbons, C7-C9, isoalkanes has been examined in a series of studies on fish, Daphnia and algae, and additional QSAR modelling has been performed. The most conservative results of aquatic studies showed this substance to be of moderate toxicity, with LL50 or EL50 values of 18.4 mg/L (fish), 2.4 mg/L (Daphnia), and 10 mg/L (algae). All studies were conducted using Water Accomodated Fractions (WAFs) studies because of the limited water solubility. QSAR modelling data on microorganisms resulted in an EL50 of 28.48 mg/L. A study on the chronic toxicity to Daphnia resulted in a NOELR of 1 mg/L. Further QSAR modelling was performed to address chronic toxicity of hydrocarbons, C7-C9, isoalkanes to fish and a NOELR was found to be 0.778 mg/L. Standard tests for terrestrial endpoints are intended for single substances and are not appropriate for the risk assessment of this complex substance. For the purpose of risk assessment, soil PNECs for hydrocarbon blocks have been derived using aquatic PNECs and the equilibrium partitioning method (EqP) using representative structures. Studies on long-term or reproductive toxicity to birds do not need to be conducted due to the existence of a large mammalian dataset demonstrating low toxicity to higher organisms.

Conclusion on classification

The substance is inherently biodegradable. The most sensitive acute aquatic value is an EL50 of 2.4 mg/L (Daphnia). Measured data on BCF and the log Kow are not available. An evaluation of representative hydrocarbon structures using the PETRORISK model indicates no structures meet the Bioaccumulative (B) or very Bioaccumulative (vB) criteria. Chronic toxicity values are 1 mg/L (experimental result) or 0.778 mg/L (estimated with PETRORISK model). Log Kow values are available for compounds (see Product Library in PETRORISK spreadsheet attached in IUCLID section 13).The substance is classified aquatic chronic category 2 according to CLP/GHS.