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Short-term toxicity to fish

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Description of key information

The short-term toxicity in fish of components of Alchisor TAL 123 has been documented within this dossier.  Adequate reliable measured data exists for short-term toxicity to fish to components of Alchisor TAL 123 (namely, Hydrocarbons C11 -C14, n-alkanes, isoalkanes, cyclics, aromatics (2 -25%), undecan-1-ol and dodecan-1-ol).  In a protective approach the most sensitive study result from across the three constituents has been identified and used to address the hazard endpoint in question. The most sensitive study result from across the three substances has been identified as a reliable study with dodecan-1-ol (Veith 1983) which reports an LC50 for short term toxicity in fish of 1.01mg/L. Consequently this value will be taken as the short-term toxicity in fish endpoint for Alchisor TAL 123. 

Key value for chemical safety assessment

LC50 for freshwater fish:
1.01 mg/L

Additional information

Alchisor TAL 123 can be characterised according to three constituents: Hydroocarbons C11 -C14, n-alkanes, isoalkanes, cyclics, aromatics (2-25%), undecan-1-ol and dodecan-1-ol. Study data, where available, for each constituent has been evaluated and considered together. Several reliable (Klimisch 1 or 2) short-term toxicity studies in fish have been conducted for constituents of Alchisor TAL 123 (namely, Hydrocarbons C11 -C14, n-alkanes, isoalkanes, cyclics, aromatics (2 -25% aromatics), undecan-1-ol and dodecan-1-ol) and are included in this dossier. The reliable studies included for each constituent of Alchisor TAL 123 is briefly described below. In a protective approach the most sensitive study result from across the three constituents will be identified and used to address the hazard endpoint in question.

 

Hydrocarbons C11-C14, n-alkanes, isoalkanes, cyclics, aromatics (2-25%)

Two reliable (Klimisch 1 or 2) short-term toxicity studies for fish were available for Hydrocarbons C11 -C14, n-alkanes, isoalkanes, cyclics, aromatics (2-25%) both of which are provided by Shell Research and Technology Centre. In the first the Shell Research and Technology Centre (1995) conducted a reliable (Klimisch 1) GLP compliant OECD 203 study with low aromatic white spirit (identified as hydrocarbons, C10-C13, n-alkanes, isoalkanes, cyclics, aromatics (2-25%)). The 96 -hr LL50 for fish was 10 -100 mg/l (WAF; water accommodated fraction). In the second the Shell Research and Technology Centre (1997) conducted a reliable (Klimisch 1) GLP compliant OECD 203 study with low aromatic white spirit (identified as hydrocarbons, C10-C13, C8-C12 & C9-C12, n-alkanes, isoalkanes, cyclics, aromatics (2-25%)). The 96 -hr LL50 for fish was 10 -30 mg/l (WAF), which is the most sensitive result from the two reliable short-term studies forC9-14 aliphatics (2-25% aromatics).

 

Dodecan-1-ol

Two reliable (Klimisch 1 or 2) short-term toxicity studies for fish were available for dodecan-1-ol.  The acute toxicity of Kalco 2098 (i.e. dodecan-1-ol) to rainbow trout (Oncorhynchus mykiss) was reported by Wetton (1996) in an OECD 203 guideline GLP compliant study where the 96hr LC50 was reported as >1mg/L. Veith et al., (1983) provided short-term toxicity results for exposure of dodecan-1-ol to the fish,Pimephales promelas. Dodecan-1-ol was administered at 5 nominal concentrations in a range pre-determined to obtain 0 and 100% mortality (specific dose regimen not reported). The 96hr LC50 was calculated using the trimmed Spearman-Karber method at 1.01 mg/L for dodenca-1-ol. This study result is the most sensitive result from the two reliable short-term studies with dodecan-1-ol.

 

Undecan-1-ol

Three reliable (Klimisch 1 or 2) short-term toxicity studies for fish were available for undecan-1-ol. These include studies by Bengtsson (1984), Fisk et al., (2009), and Veith et al., (1983). Bengtsson et al., (1984) reported on a static acute toxicity test inAlburnus alburnuswith undecan-1-ol and reported a 96hr LC50 to be 4.6 mg/L. Fisk et al. (2009) provided an estimate of short term toxicity of undecan-1-ol which was predicted using a multiple partitioning model where the predicted LL50 is 1.7 mg/L. Veith et al., (1983) provided short-term toxicity results for exposure to undecan-1-ol to the fish,Pimephales promelas.Undecan-1-ol was administered at 5 nominal concentrations in a range pre-determined to obtain 0 and 100% mortality (specific dose regimen not reported). The 96hr LC50 was calculated using the trimmed Spearman-Karber method at 1.04mg/L for undecan-1-ol. This value is the most sensitive result of the three reliable short-term studies with undecan-1-ol.

 

The short-term toxicity in fish of components of Alchisor TAL 123 has been documented within this dossier. Adequate reliable measured data exists for short-term toxicity to fish to components of Alchisor TAL 123 (namely, Hydrocarbons C11 -C14, n-alkanes, isoalkanes, cyclics, aromatics (2 -25%), undecan-1-ol and dodecan-1 -ol). In a protective approach the most sensitive study result from across the three constituents has been identified and used to address the hazard endpoint in question.The most sensitive study result from across the three substances has been identified as a reliable study with dodecan-1-ol (Veith et al., 1983) which reports an LC50for short term toxicity in fish of 1.01mg/L. Consequently this value will be taken as the short-term toxicity in fish endpoint for Alchisor TAL 123.