Care should be taken to ensure that the cargo is sufficiently
inhibited to prevent polymerization at all times during the voyage.
Ships should be provided with a certificate from the manufacturer
stating:
-
.1 name and amount of inhibitor added;
-
.2 date inhibitor was added and the normally expected
duration of its effectiveness;
-
.3 any temperature limitations affecting the
inhibitor;
-
.4 the action to be taken should the length of the
voyage exceed the effective lifetime of the inhibitors.