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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Endpoint summary

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Administrative data

Description of key information

The members of this category are gases and will predominantly partition to the atmosphere. This will limit their aquatic toxicity. Due to the difficulty associated with conducting aquatic toxicity tests, experimental data were not available for the members of this category. In the absence of measured data, estimated data were calculated using the QSAR model.

ECOSAR Program v1.00. in EPI Suite v4.00. Calculations were conducted using substances which were considered representative of the category (butane, isobutane, butene, isobutene). The toxicity of the substances was calculated to range from 7.7 mg/L to 27.9 mg/L for the different aquatic taxanomic groups.These values indicate that the toxicity criteria stipulated in Annex XIII are unlikely to be met. Therefore, this Category is not considered to be T on the basis of the screening criterion.

CAS Numbers 92045-23-3 and 95465-89-7 are both listed in Annex I of Directive 67/548/EEC replaced by Table 3.2 in Annex VI to CLP Annex I but are not classified for environmental hazards. Additionally constituent substances, butane, isobutene, butene and isobutene are listed in Annex 1 of Directive 67/548/EEC replaced by Table 3.2 in Annex VI to CLP but are not classified for environmental hazards. This Category would not be classified for environmental hazards.

Additional information