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EC number: 295-405-4
CAS number: 92045-23-3
A complex combination of hydrocarbons produced by the distillation of the products of a steam cracking process. It consists predominantly of hydrocarbons having a carbon number of C4, predominantly 1-butene and 2-butene, containing also butane and isobutene and boiling in the range of approximately minus 12°C to 5°C (10.4°F to 41°F).
The half-life of representative components of the streams in this
category have been estimated using a standard QSAR model and the
calculated Henry's Law Constants.
The Henry's Law Constant indicates that volatilisation from aqueous
media is expected to be rapid. According to Pedersen et al. (1995), the
criteria for total degradation (95% removal by volatilisation,
equivalent to 70% degradation in the aquatic environment in 28 days)
corresponds to a half-life of 6 days (144 hours). The half-life of these
representative components are significantly shorter than this indicating
that they would meet the criteria for total degradation.
Pedersen F, Tyle H, Niemela JR, Guttmann B, Lander L, Wedebrand A. 1195.
Environmental Hazard Classification – data collection and interpretation
guide (2ndedition). Tema Nord 1195:581. Nordic Council of
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