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EC number: 310-013-6
CAS number: 102110-15-6
A complex combination of hydrocarbons obtained by distillation of the products from a steam-cracking process. It consists predominantly of hydrocarbons having carbon numbers of C5 and dicyclopentadiene and boiling in the range of approximately 30°C to 170°C (86°F to 338°F).
Short term toxicity to aquatic invertebrates data are available for 2 streams within this Category. The 48 hour EC50 ranged from 0.76 - 2.9 mg/L with the
EL50 ranging from 0.91 - 3.2 mg/L (WAF). One study provided a 96 hour LC50 for a marine invertebrates of 1.4 mg/L.
CAS No 68478-10-4
(ACC, 2004e): This is a GLP compliant, guideline study considered
adequate for assessment. After Daphnia magna were exposed to WAFs
prepared from Dicyclopentadiene/Codimer Concentrate for 48 hours, the EL50
was 0.91 mg/L and the EC50 was 0.76 mg/L.
CAS No 68477-54-3
(ACC, 2004f): This is a GLP compliant, guideline study considered
adequate for assessment. The 48 hour EL50 was 3.2 mg/L and
the EC50 was 2.9 mg/L (WAF).
CAS No 68477-54-3
(Sabic, 1987a): This is a GLP compliant, equivalent to guideline study.
The study was a marine study and no replicates were mentioned. The 96
hour LC50 was 1.4 mg/L and the 96 hour NOEC was 1.0 mg/L.
authors report results based on nominal loading rates (WAF) and mean
measured concentrations. As the test substance is a hydrocarbon stream
with various components reporting a measured concentration could be
misleading as the measured concentration does not relate to a
concentration of the raw stream. Instead, we have used the results
reported as WAF, which better represent the potential toxicity of the
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