Registration Dossier
Registration Dossier
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EC number: 270-724-1 | CAS number: 68477-33-8 A complex combination of hydrocarbons from the distillation of saturated and unsaturated hydrocarbons usually ranging in carbon numbers from C3 through C6, predominantly butane and isobutane. It consists of saturated and unsaturated hydrocarbons having carbon numbers in the range of C3 through C4, predominantly isobutane.
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- no data available: testing technically not feasible
Marine water
- Hazard assessment conclusion:
- no data available: testing technically not feasible
STP
- Hazard assessment conclusion:
- no data available: testing technically not feasible
Sediment (freshwater)
- Hazard assessment conclusion:
- no data available: testing technically not feasible
Sediment (marine water)
- Hazard assessment conclusion:
- no data available: testing technically not feasible
Hazard for air
Air
- Hazard assessment conclusion:
- hazard related to composition of atmosphere identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- no data available: testing technically not feasible
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no data available: testing technically not feasible
Additional information
Members of this category are gases and are extremely unlikely to reside in the aquatic or terrestrial compartment. Deriving an aquatic or soil PNEC for a gas is unreasonable and technically of little use for risk assessment as the substance will not be present in the aquatic or terrestrial environment.
Conclusion on classification
The members of the category, 68955 -28 -2, 8774 -01 -3 and 92045 -23 -3 are listed in Annex VI to CLP but are not classified for environmental hazards. Additionally constituent substances, butane, isobutene, butene, isobutene are listed in Annex VI to CLP but are not classified for environmental hazards. The major constituent component, 1,3 -butadiene, is also listed in Annex VI to CLP but is not classified for environmental hazards. The acute toxicity results for this category range from 33.6 to >1000 mg/L and as the streams are considered not to be persistent, none of the members of the category meet the criteria for classification as environmental hazards under the CLP regulation. This Category would not be classified for environmental hazards.
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.
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