Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

There are no studies available on the acute toxicity to fish. Based on an analogue approach data are read-across to Hydrocarbons, C16-C20, n-alkanes, isoalkanes, cyclics, aromatics (2-30%). The acute toxicity, as measured by mortality to rainbow trout (Oncorhynchus mykiss) was evaluated in two studies (Shell 1995, Shell 1983). Under the conditions of these studies, no acute lethal toxicity to Oncorhynchus mykiss was observed at 1000 mg/L, based on nominal loading of the test substance in water.

The acute toxicity of hydrocarbons, C13-C20, n-alkanes, iso-alkanes, cyclics, 40-60% aromatics, as measured by mortality to the copepod (Acartia tonsa) was evaluated in freshwater (Svalheim et al. 2001). Under the conditions of this study, there was no acute toxicity to Acartia tonsa at >3240 mg/L, based on nominal loading of the test substance in water. This finding is corroborated by a study (Shell 1995) with Daphnia magna usinghydrocarbons, C16-C20, n-alkanes, isoalkanes, cyclics, aromatics (2-30%), in which an EL0 of >1000 mg/L, based on nominal loading of the test substance in water, was determined.

The chronic toxicity of hydrocarbons, C13-C20, n-alkanes, iso-alkanes, cyclics, 40-60% aromatics was measured in a 21-day toxicity study with Brachydanio rerio. A NOELR 5000 mg/L was determined, indicating that hydrocarbons, C13-C20, n-alkanes, iso-alkanes, cyclics, 40-60% aromatics is not expected to be chronically toxic to fish.

There are no studies available on the chronic toxicity to invertebrates. Therefore date were read-across to hydrocarbons, C11-C20, n-alkanes, isoalkanes, cyclics, aromatics (2 -30%). In a 21-day toxicity study with Daphnia magna a NOELR of 17 mg/L based on inhibition of reproduction was determined.

The toxicity of hydrocarbons, C13-C20, n-alkanes, iso-alkanes, cyclics, 40-60% aromatics, as measured by inhibition of growth rate of Skeletonema costatum was evaluated in seawater (Svalheim et al. 2001). Under the conditions of this study, the test substance did produce toxicity to Skeletonema costatum with an EL50 (growth rate) of 51 mg/L, based on nominal loading of the test substance in water. The NOELR was determined to be 3 mg/L.

Water Accomodated Fractions of the read-across substance hydrocarbons, C16-C20, n-alkanes, isoalkanes, cyclics, aromatics (2-30%), did not inhibit microbial respiration in a sludge sample at a concentration of 1000 mg/L (ExxonMobil Chemical 1999). Therefore, Hydrocarbons, C16-C20, n-alkanes, isoalkanes, cyclics, aromatics (2-30%), is not expected to adversely affect microbial activity in a wastewater treatment plant.