In general, information about several physicochemical properties of AE homologues
is necessary in order to carry out an environmental risk assessment according to the
principles of the EU TGD (2003), especially if the EUSES program is used to carry
out the assessment. The most important of these physicochemical properties are the
water solubility, the vapour pressure, the octanol/water partition coefficient or the
associated Koc
1 and Kd
2 values used to quantify adsorption onto various environmental
solids, and the Henry’s law constant, which quantifies the air/water partitioning
behaviour. However, melting point and boiling point information are also useful for
the environmental risk assessment. The experimentally available data are discussed
below. It is also possible to calculate these physical chemical properties for AEs,
using programs such as EPIWIN (US EPA 2000). Appendix III gives the physical
chemical properties calculated by EPIWIN for any AE isomers for which the
calculated value has been used in the HERA environmental AE assessment