Registration Dossier
Registration Dossier
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EC number: 918-317-6 | CAS number: 68551-17-7
Endpoint summary
Administrative data
Description of key information
There is no data available for this substance. However, key and supporting data is available for the following structural analogues: Hydrocarbons, C9-C10, n-alkanes, isoalkanes, cyclics, <2% aromatics, Hydrocarbons, C10-C13, n-alkanes, isoalkanes, cyclics, <2% aromatics and Hydrocarbons, C10 -C14, isoalkanes, cyclics, <2% aromatics. The data is read across to these substances based on analogue read across and a discussion and report on the read across strategy is provided as an attachment in IUCLID Section 13.
The substances are poorly soluble and made of constituents with various water solubility. As a consequence, the exposures were performed with Water Accommodated Fractions (WAFs). Therefore, the results are based on nominal loadings.
There was no experimental data available for this substance or structural analogues for long-term toxicity to fish, long-term toxicity to aquatic invertebrates or toxicity to microorganisms. For these endpoints, the aquatic toxicity was estimated using the PETROTOX computer model (v4.0), which combines a partitioning model used to calculate the aqueous concentration of hydrocarbon components as a function of substance loading with the Target Lipid Model used to calculate acute and chronic toxicity of nonpolar narcotic chemicals. PETROTOX computes toxicity based on the summation of the aqueous-phase concentrations of hydrocarbon block(s) that represent a hydrocarbon substance and membrane-water partitioning coefficients (KMW) that describe the partitioning of the hydrocarbons between the water and organism.
According to the harmonised CLP legislation (2008), Annex VI, this substance is classified for the environment as aquatic chronic category 2 with the hazard statement H412: Harmful to aquatic life with long lasting effects.
Additional information
Key and supporting information is summarised below:
Short-term toxicity to fish
Hydrocarbons, C9-C10, n-alkanes, isoalkanes, cyclics, <2% aromatics presented a a 96-hour LL50 range of >10 to <30 mg/L and LL0 value of 1 mg/L for Oncorhynchus mykiss.
Hydrocarbons, C10-C13, n-alkanes, isoalkanes, cyclics, <2% aromatics presented a 6-hour LL50 value of >1000 mg/L and LL0 value of 1000 mg/L for Oncorhynchus mykiss.
Hydrocarbons, C9-C10, n-alkanes, isoalkanes, cyclics, <2% aromatics presented a 96-hour LL50 value of 50.9 mg/L for Oncorhynchus mykiss.
Long-term toxicity to fish
The aquatic toxicity was estimated using the PETROTOX computer model (v4.0), which combines a partitioning model used to calculate the aqueous concentration of hydrocarbon components as a function of substance loading with the Target Lipid Model used to calculate acute and chronic toxicity of nonpolar narcotic chemicals. PETROTOX computes toxicity based on the summation of the aqueous-phase concentrations of hydrocarbon block(s) that represent a hydrocarbon substance and membrane-water partitioning coefficients (KMW) that describe the partitioning of the hydrocarbons between the water and organism.
Short-term toxicity to aquatic invertebrates
Hydrocarbons, C9-C10, n-alkanes, isoalkanes, cyclics, <2% aromatics presented a 48-hour EL50 range of >22 to <46 mg/L and a LL0 value of 10 mg/L for Daphnia magna.
Hydrocarbons, C10-C13, n-alkanes, isoalkanes, cyclics, <2% aromatics presented a 48-hour LL50 of >1000 mg/L for Daphnia Magna.
Hydrocarbons, C10-C14, usoalkanes, cyclics, <2% aromatics presented a 496-hour LL50 value is reported as >81,000 mg/L for Daphnia Magna.
Long-term toxicity to aquatic invertebrates
The aquatic toxicity was estimated using the PETROTOX computer model (v4.0), which combines a partitioning model used to calculate the aqueous concentration of hydrocarbon components as a function of substance loading with the Target Lipid Model used to calculate acute and chronic toxicity of nonpolar narcotic chemicals. PETROTOX computes toxicity based on the summation of the aqueous-phase concentrations of hydrocarbon block(s) that represent a hydrocarbon substance and membrane-water partitioning coefficients (KMW) that describe the partitioning of the hydrocarbons between the water and organism.
Toxicity to algae and cyanobacteria
Hydrocarbons, C9-C10, n-alkanes, isoalkanes, cyclics, <2% aromatics presented a 72-hr ELr50 of >1000 mg/L for Pseudokirchneriella subcapitata. The 72-hr NOELR values for biomass and growth rate for Pseudokirchneriella subcapitata were reported as 1 and <1 mg/L, respectively.
Hydrocarbons, C10-C13, n-alkanes, isoalkanes, cyclics, <2% aromatics presented a 72-hr EL50 of >1000 mg/L (biomass and growth rate) for Pseudokirchneriella subcapitata. The 72-hr NOELR values for biomass and growth rate for Pseudokirchneriella subcapitata were reported as 1000 mg/L, respectively.
Toxicity to microorganisms
The aquatic toxicity was estimated using the PETROTOX computer model (v4.0), which combines a partitioning model used to calculate the aqueous concentration of hydrocarbon components as a function of substance loading with the Target Lipid Model used to calculate acute and chronic toxicity of nonpolar narcotic chemicals. PETROTOX computes toxicity based on the summation of the aqueous-phase concentrations of hydrocarbon block(s) that represent a hydrocarbon substance and membrane-water partitioning coefficients (KMW) that describe the partitioning of the hydrocarbons between the water and organism.
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