Registration Dossier
Registration Dossier
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EC number: 308-733-0 | CAS number: 98219-64-8 A complex combination of hydrocarbons obtained by the treatment and distillation of raw steam-cracked naphtha. It consists predominantly of unsaturated hydrocarbons boiling in the range above approximately 180°C (356°F).
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
The 96 hr LC50 toxicity to Fish for this Category was in the range of 1.0 - ca 220 mg/l. The 96 h NOEC based on three studies ranged between 5.6 - 46.4mg/l. LL50 ranged from 1.1 to 32 mg/l
Key value for chemical safety assessment
Additional information
A range of proprietary studies were available for members of this Category which reported an LC50 of between 1.0 and 220 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 a LL50 of 32 mg/l based on a WAF study with loading rates of 10 -100 mg/l, and an LC50 of 48 mg/l.
A study available from ExxonMoil (2004) reported LC50 values of 1.0 mg/l and 4.4 mg/l for the streams 68513 -69 -9 and 69013 -21 -4 respectively. BASF (1983) stated an LC50 of >22<32 mg/l for the stream 85117 -10 -9 and BASF (1984) an LC50 of 220mg/l for the stream 98072 -36 -7
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