Most all hunter's detergents are scent and phosphate free. I use the Hunter's Specialty Scent-A-Way pictured below. Wildlife Research and Atsko also make hunter's detergents. Most all household detergents- Tide, All, Purex, etc., DO contain phosphates (brighteners). If you turkey hunt in the same camo you deer hunt in, and most guys do, might as well keep it scent and UV free year around. The HS Scent-Away is economical....you only need a capful per load....a single bottle will last you an entire year even if you hunt hard.
Here's an excellent article on turkey's eyesight and UV rays-