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EC number: 295-442-6
CAS number: 92045-60-8
A complex combination of hydrocarbons obtained by subjecting a petroleum naphtha to a sweetening process to convert mercaptans or to remove acidic impurities. It consists of hydrocarbons having carbon numbers predominantly in the range of C4 through C5, predominantly C5, and boiling in the range of approximately minus 10°C to 35°C (14°F to 95°F).
Acute Fish Toxicity:
Water accommodated fractions of isomerization naphtha produced a 96-hour LL50 value of 10 mg/L with Oncorhynchus mykiss. Water accommodated fractions of light alkylate naphtha produced a 96-hour LL50 value of 8.2 mg/L with Pimephales promelas. These data are used as read-across to all substances in the naphtha category.
Chronic Fish Toxicity:
Read across has been applied for this endpoint, using the results of long-term toxicity testing on invertebrates (Daphnia). Toxic effects of hydrocarbons are primarily caused by narcosis, and occur in a narrow range of molar concentrations across aquatic taxa; hence, read across between species is justified.
Acute Invertebrate Toxicity:
Water accommodated fractions of light straight-run naphtha produced a 48-hour EL50 value of 4.5 mg/L with Daphnia magna. These data are used as read-across to all substances in the naphtha category.
Chronic Invertebrate Toxicity:
Water accommodated fractions of light alkylate naphtha produced a 21 -day NOELR (No Observed Effect Loading Rate) value of 2.6 mg/L with Daphnia magna. These data are used as read-across to all substances in the naphtha category.
Water accommodated fractionsof gasoline produced a freshwater 72 -hour EL50 for Selenastrum capricornutum (new name: Pseudokirchnerella subcapitata) of 3.1 mg/L based on growth rate. The 72 -hour NOELR (No Observed Effect Loading Rate) value for Pseudokirchnerella subcapitata is 0.5 mg/L based on growth rate. These data are used as read-across to all substances in the naphtha category.
The estimated 72-hr LL50 value for Tetrahymena pyriformis, one of the most sensitive aquatic microorganism species, is 15.41 mg/L.
Some information for this category has been generated using the models PETROTOX and/or SPARC. The QMRFs for PETROTOX and SPARC are attached in IUCLID Section 13, with the associated QPRF.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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