Registration Dossier
Registration Dossier
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EC number: 270-691-3 | CAS number: 68476-52-8 A complex combination of hydrocarbons produced by distillation of products from a cracking process in an ethylene plant. It consists predominantly of C4 hydrocarbons.
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
The half-lives in air (with OH radicals) ranges from 0.161 days (1,3-butadiene) to 4.064 days (butane)
Key value for chemical safety assessment
Additional information
As the members of this category are gases the most dominant environmental fate process will be photooxidation. Representative substances in this category have been shown to react rapidly with hydroxyl radicals and ozone. The reaction with ozone is less rapid, and therefore less important than the reaction with hydroxyl radicals. However, at night, when the concentration of hydroxyl radicals falls to negligible levels, this removal mechanism will become more important. It is expected that the members of this category will be rapidly removed from the atmosphere by photooxidation.
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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