Registration Dossier
Registration Dossier
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EC number: 265-193-8 | CAS number: 64742-90-1 A complex combination of hydrocarbons obtained as the residual fraction from the distillation of the products of a steam cracking process (including steam cracking to produce ethylene). It consists predominantly of unsaturated hydrocarbons having carbon numbers predominantly greater than C14 and boiling above approximately 260°C (500°F). This stream is likely to contain 5 wt. % or more of 4- to 6-membered condensed ring aromatic hydrocarbons.
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
The 96 hr LC50/LL50 toxicity to fish for this Category was in the range of 1.0 - 48 mg/l.
Key value for chemical safety assessment
Additional information
A range of proprietary studies were available for members of this Category which reported 96hr LC50 or LL50 of between 1.0 and 48 mg/L.
Two studies were available for the stream 64742 -90 -1 from Brixham Environmental Laboratory Astrazeneca UK Ltd (2004) and TNO (1989) which respectively reported LL50 of 32 mg/l and 48 mg/l. A study available from the ExxonMobil (2004a, 2004b) reported LL50 values of 1.1 mg/l and 5.6 mg/l for the streams 68513 -69 -9 and 69013 -21 -4 respectively. BASF (1983) stated an LL50 of >22<32 mg/l for the stream 85117 -10 -8 and an LL50 of 4.9mg/L for the same stream (BASF 2008).
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