Definitely not what you need. Better to wait and find the real thing than to start an improper program.
Check the ingredients, it should say nothing but 'Sea Salt'. Anything else is impurities/additives.
You can check the 'Salt Cure' page to look at some approved salt brands. Real Salt is a good one. If you have trouble finding it locally (I did) then you can also order pure Sea Salt online.
If you're ordering online, better to buy in quantity as it will save shipping. Once you start the Master-Cleanse you'll most likely go on to a healthier diet, and you can use the extra Sea Salt for all your cooking purposes.