Words hypenating when I dont want them to!

Hi – I added the below to the General page in Cherry Options where it says Custom CSS but the words breaking on a page with a hyphen is still a problem when viewing in internet explorer. Is this the right code below or should I be pasting it somewhere else in a cherry template?

.post_content {
word-wrap: normal;
-webkit-hyphens: none;
-o-hyphens: none;
-moz-hyphens: none;
hyphens: none;
-ms-hyphens: none:
}