Set of inherent properties of a substance, mixture of substances, or a
process involving substances that, under production, usage, or
disposal conditions, make it capable of causing
adverse effects to
organisms or the environment, depending on the degree of
exposure;
in other words, it is a source of danger.
Source:
PAC, 2004, 76, 1033
(Glossary of terms used in toxicokinetics (IUPAC Recommendations 2003))
on page 1054