Dangerous Goods by Road
conditions
the relative densities of the filling substances shall not exceed that used to determine the height for
the drop test performed successfully according to 6.1.5.3.5 or 6.5.6.9.4 and the mass for the stacking
test performed successfully according to 6.1.5.6 or where necessary according to 6.5.6.6 with the
assimilated standard liquid(s). the vapour pressures of the filling substances at 50 °c or 55 °c shall
not exceed that used to determine the pressure for the internal pressure (hydraulic) test performed
successfully according to 6.1.5.5.4 or 6.5.6.8.4.2 with the assimilated standard liquid(s). in case that
filling substances are assimilated to a combination of standard liquids, the corresponding values of the
filling substances shall not exceed the minimum values derived from the applied drop heights,
stacking masses and internal test pressures.
example: un 1736 benzoyl chloride is assimilated to the combination of standard liquids "mixture of
hydrocarbons and wetting solution". it has a vapour pressure of 0.34 kpa at 50 °c and a relative
density of approximately 1.2. design type tests for plastics drums and jerricans were frequently
performed at minimum required test levels. in practice this means that the stacking test is commonly
performed with stacking loads considering only a relative density of 1.0 for the "mixture of
hydrocarbons" and a relative density of 1.2 for the "wetting solution" (see definition of standard
liquids in 6.1.6). as a consequence chemical compatibility of such tested design types would not be
verified for benzoyl chloride by reason of the inadequate test level of the design type with the standard
liquid "mixture of hydrocarbons". (due to the fact that in the majority of cases the applied internal
hydraulic test pressure is not less than 100 kpa, the vapour pressure of benzoyl chloride would be
covered by such test level according to 4.1.1.10).
all components of a filling substance, which may be a solution, mixture or preparation, such as
wetting agents in detergents and disinfectants, irrespective whether dangerous or non-dangerous, shall
be included in the assimilation procedure.