Registration Dossier
Registration Dossier
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EC number: 200-816-9 | CAS number: 74-86-2
Endpoint summary
Administrative data
Description of key information
Additional information
Acetylene is not expected to hydrolyse based on a lack of hydrolysable functional groups. However, according to Atkinson (1989), the kinetic rate constant for the reaction of acetylene with OH radicals is estimated to be 0.82 E-12 cm3/mol/s, indicating that the atmospheric half-life would be 13.12 days. In addition a half-life of 382 days for ozone radicals has been reported (Atkinson 1989).
Reliable data are not available to demonstrate that acetylene is readily biodegradable, and for the purposes of a risk assessment, ready biodegradability will not be assumed.
Acetylene has the potential to rapidly volatilise from surface waters, based on a calculated Henry's Law constant of 2.20E+003 Pa m³/mol at 25 ºC. It is not expected to partition to suspended matter or sediments based on its log Kow of 0.37.
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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