| Title:  Schweizer's Reagent CAS Registry Number:  17500-49-1 CAS Name:  Tetraamminecopper dihydroxide Literature References:  Approximately [Cu(NH3)4](OH)2.  Usually applied in the form of an ammoniacal soln which is easily obtained by dissolving Cu(OH)2 in 20% ammonia water.  The soln is an intense azure color.  Evaporation yields long, blue needles:  Schweizer, J. Prakt. Chem. 72, 109, 344 (1857). Use:  Dissolves cellulose; used in rayon production.  |