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EC number: 270-990-9
CAS number: 68512-91-4
A complex combination of hydrocarbons produced by distillation and condensation of crude oil. It consists of hydrocarbons having carbon numbers in the range of C3 through C5, predominantly C3 through C4.
The substances in the
category are gases and will predominantly partition to the atmosphere,
which will limit the aquatic toxicity. Due to the difficulty associated
with conducting aquatic toxicity tests, experimental data were available
for only one member of this category: Benzene (CAS 71-43-2). The lowest
acute and chronic toxicity values for benzene are an 96-hour LC50
for Oncorhynchus mykiss of 5.3 mg/L and a 32-day NOEC for Pimephales
promelas of 0.8 mg/L.
In the absence of
measured data, data for the other representative constituents of the
category were predicted using the QSAR model ECOSAR
(Program v1.00 in EPI Suite v4.00). The
short term toxicity of the constituents was predicted to range from 6.97
mg/L to 623 mg/L for the different aquatic taxonomic groups.The long
term toxicity of the constituents was predicted to range from 0.834 mg/L
to 51.5 mg/L for the different aquatic taxonomic groups.
The 96-hour LC50 for benzene for Oncorhynchus mykiss was 5.3 mg/L.
The 32-day NOEC for benzene for Pimephales promelas was
The 48-hour EC50 for benzene for Daphnia magna was 10 mg/L.
The 7-day NOEC for benzene for Ceriodaphnia dubia was 3 mg/L.
The 72-hour EC50 and EC10 for benzene for Pseudokirchneriella
subcapitata were 100 mg/L and 34 mg/L, respectively.
The model predicted LC50 for short-term toxicity to fish to range from
11.4 mg/L to 623 mg/L.
The model predicted chronic value for long-term toxicity to fish to
range from 1.22 mg/L to 51.5 mg/L.
The model predicted EC50 for short-term toxicity to aquatic
invertebrates to range from 6.97 mg/L to 307 mg/L.
The model predicted chronic value for long-term toxicity to aquatic
invertebrates to range from 0.834 mg/L - 19.9 mg/L.
The model predicted EC50 for short-term toxicity to aquatic algae and
cyanobacteria to range from 7.04 mg/L to 124 mg/L, whereas the chronic
value for long-term toxicity to aquatic algae and cyanobacteria was
predicted to range from 2.17 mg/L to 23.5 mg/L.
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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