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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Measured short-term toxicity data with the registration substance are available for fish, invertebrates and algae.

Long-term data with fish and invertebrates are read across from GTL-derived substances in the relevant carbon number range for the registered substance.

The key values are:

Short-term toxicity

Fish: A 96-hour LL50 value of >100 mg/l and NOELR value of ≥100 mg/l (WAF loading rate) (highest concentration tested) has been determined for the effects of the test substance on mortality and sublethal effects of Cyprinus carpio.

Invertebrates: A 48-hour EL50 value of >100 mg/l and NOELR value of ≥100 mg/l (WAF loading rate) (highest concentration tested) have been determined for the effects of the test substance on immobilisation of Daphnia magna.

Algae: A 72-hour EL50 value of >100 mg/l and NOELR value of ≥100 mg/l (WAF loading rate) (highest concentration tested) have been determined for the effects of the test substance on growth rate of Pseudokirchneriella subcapitata.

Long-term toxicity

Fish: A 33-day NOELR value of ≥100 mg/l (WAF loading rate) (highest concentration tested) has been determined for the effects of read-across substance GTL Gasoil on survival, growth and development of Pimephales promelas.

Invertebrates: A 21-day NOELR value of 32 mg/l (WAF loading rate) (highest concentration tested) has been determined for the effects of read-across substance GTL Gasoil on immobilisation and reproduction of Daphnia magna.

Toxicity to microorganism data have been read across from GTL Gasoil and GTL Base Oil Distillates. In both cases the 3-hour EC50 was >1000 mg/l; NOEC = 1000 mg/l (Clarke, 2009a and 2009b).

Toxicity to sediment organisms data have been read across from GTL Gasoil. A 28-day NOEC value of ≥1000 mg/kg sediment (dry weight) has been determined with Chironomus tentans and a 28-day NOEC value of ≥100 mg/kg sediment (dry weight) with Lumbriculus variegatus.

Discussion on methodology

In undertaking chronic toxicity testing the best use of all available data should be made. However, the assessment of ecotoxicity data for many petroleum products is complicated as products are UVBCs containing many individual substances with a range of solubilities. Chemical analyses of the aqueous concentrations of all constituents are not possible due to the complexity of the composition.

The concentration of each constituent dissolved in the water phase at any particular ‘loading’ should be maximized. The maximum possible water concentration of each component is typically achieved through prolonged stirring of the water-petroleum substance mixture to produce a Water Accommodated Fraction (WAF). WAFs are prepared individually and not by serial dilution of a single stock solution.  In addition, a sealed system approach maybe for more volatile petroleum substances.

Hydrocarbons, C18-C24, isoalkanes, <2% aromatics is a poorly water soluble UVBC and poses specific challenges when preparing aqueous solutions for toxicity testing.  This substance contains constituents with a range of physio-chemical properties (e.g. volatility, water solubility) and fall under the OECD guidance document 23 (2nd Edition) description and definition of “difficult to test” substances (Organisation for Economic Co-operation and Development [OECD] 2019). All long-term aquatic studies with GTL Gasoil used as read-across data for Hydrocarbons, C18-C24. Isoalkanes, <2% aromatics followed the recommendations laid out for such substances.