 It is a fine, slightly yellowish, crystalline powder that melts at .It is polymorphic, with four known anhydrous (water-free) and two monohydrate crystalline forms.Other brand names include "Zadex" (Hungary), "Rheutrop" (Austria), "Acemetadoc", "Acephlogont", "Azeat", "Rantudil" (Germany, Hungary, Mexico, Poland, Portugal, Turkey), "Gamespir" (Greece), "Oldan", "Reudol" (Spain), "Tilur" (Switzerland), "ACEO" (Taiwan), "Ost-map" (Egypt).