Substitute for Iodine Crystals

[Giovanni7170]

I'm doing my first Red-P Meth Cook. I've been able to obtain everything except for the Iodine Crystals. I am finding it hard to locate 7% iodine tincture as well, Is there something else I can substitute for this?

 

[William D.]

Only with HI acid

 

[Giovanni7170]

Do I just substitute the Hl acid for the iodine in the process? Or is there something else I need to do in order to use it?