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EC number: 295-302-4 | CAS number: 91995-41-4 A complex combination of hydrocarbons obtained by distillation of heat-soaked steam-cracked naphtha. It consists predominantly of hydrocarbons having carbon numbers in the range of C4 through C6, predominantly C5.
A measured BCF is not available for any streams in this category. As the log Kow of some category members is >3 the bioaccumulation endpoint cannot be waived. Nonpolar substances have been shown to have a linear relationship between log Kow and BCF in the log Kow range 1 - 6. Several QSAR models have been developed that calculate the BCF of non-polar, hydrophobic compounds on the basis of their log Kow (e.g. Veith et al, 1979 and USEPA, 2008). The streams in this category fall within the applicability domain of these models. The calculated log BCF of representative components of these streams range from
6 to 752 and the mean is 65.
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