Dangerous goods master - not assigned to phrase set features phrase check

Hi Gurus,

I have created a Dangerous Goods master record but don't seem to able to store the name of the hazardous substance i.e. ethanol. Where should this type of information be stored? I have tried entering the description in the Dangerous Goods Description field but I get an error message that says 'Characteristic not assigned to phrase set features phrase check function' and I am not sure what to do? Thanks in advance