From: mariasophia@comprehension.com   
      
   PSA:   
   The only way to compare glyphosate is by the AE (not by the percentage)   
      
   All these years I've been buying the 41% Ranger Pro (after comparing costs   
   to the 50% Roundup) but it turns out that my "percentage" math was not the   
   math to use in order to compare "how much glyphosate" is in the jug.   
      
   You can't compare any two concentrations WITHOUT knowing the salt used!   
      
   Who knew?   
   Not me.   
      
   Now I do.   
      
   The acid equivalent (AE) strips away the salt and tells you the actual   
   amount of glyphosate acid per gallon. That's what you used to compare.   
      
   It's on every label. But it takes various forms, e.g.,   
    "Equivalent to 4.5 lbs glyphosate acid per gallon."   
      
   A 50% product can have less AE than a 41% product if the salt is heavier.   
      
   In summary, glyphosate is a solid so they convert it into a salt form.   
   1. The Potassium salt nets the highest AE (e.g., 4.8 lb AE per gallon).   
   2. The Isopropylamine salt (which is heavier) nets a 3.0 lb AE per gallon.   
   There are other salts which net out differently.   
      
   When comparing different glyphosate percentages, only the AE matters.   
   --   
   And no, this is not a thread about getting cancer from spraying your yard.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)