Can I use hair dye without mixing it with developer?

Unlikely..

No. The creme won’t work without it.

Duane reade or cvs sell this developer or not guys?

Didn’t it come with your dye?

@chyna No I got a separate hair dye creme at ricky’s

Developer is meant to be used in a certain proportion based on your hair situation. Since you clearly are not trained in cosmetology, and are working with non virgin hair, back off and consult a professional before you burn your hair off.

Some hair dyes don’t require a developer. Those that need them simply won’t work without it.

To the best of my knowledge (13 years of experience), Color Ion, Beyond The Zone, Manic Panic & Special Effects, are the only kind of hair dye you don’t need to use with a developer.