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EC number: 202-163-5
CAS number: 92-52-4
The half-life for indirect phototransformation of biphenyl in air
through reaction with hydroxyl radicals has been determined to be 16 h,
based on experimental second-order rate constant (Atkinson et al., 1984)
and assumed hydroxyl radical concentrationof 1.5 million molecules/cm3.
No other reliable information was identified with regard to abiotic
transformation of biphenyl in the environment. However, the available
information indicates that direct phototransformation in air and water
are most likely not processes significantly contributing to degradation
of biphenyl in the environment. No information was available on
hydrolysis but because biphenyl does not contain any water-reactive or
hydrolysable groups, hydrolysis is not considered an important
degradation process either. No further testing is needed on abiotic
degradation pathways, as biodegradation of this (readily biodegradable)
substance will serve as the dominant fate process in aquatic, benthic,
and terrestrial environments.
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