Does hair dye out of a box expire?

Yes. Hair Dye in a box does expire. For most products they can be good for about three years unopened. However, if for any reason you do not have the box the product came in, there are codes on the individual bottles that will indicate what year it was made. Its helpful to navigate over to the product's website. Search the "Frequently ask questions" section and you should be able to determine when your product was made by matching up the codes on the bottle to the ones provided to you online.