How long can I keep hair dye in the bottle for?

jasey rae

New member
I bought it around one month ago and still have over half of the bottle left over.
It's Splat if that helps.
I tried looking around the box and bottle for an expiration date but I couldn't find any.
The dye came mixed so it's not like I had to combine the powder and liquid to make the dye.
How much longer can I keep it for?
Thanks :)
 
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