hazardous

Yes.

go into

I looked up hazardous and I could not find hazardous for, only hazardous to.

When would you use to and when would you use for?

Here if someone qsked me to fill in the blank what would I have to put?
It could be hazardous you if you go into the room without a suit.

Thanks

AnonymousWhen would you use to and when would you use for?

When both are prepositions, they are essentially synonymous. Put either in your non-existent blank.

AnonymousI looked up hazardous and I could not find hazardous for, only hazardous to.

Then research further with a search engine or in a corpus.