Sea salt (Monkwick CO2)

I bought this in bookers not realising it’s not for dishwashers! It’s actually sea salt. It’s been undone for a while and a bit dirty on the top but if you scrape top layer away it should be ok. You could use it for slugs or for melting ice?
Seems a shame to chuck it.
Collect from army estate off layer road. No time wasters please collect when you say.
Thank you