Schweizer's reagent

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Schweizer's reagent (named after the chemist Matthias Eduard Schweizer ), also called Cuoxam , is a deep blue, aqueous solution of tetraammine copper (II) hydroxide with the chemical formula [Cu (NH 3 ) 4 ] (OH) 2 · 3 H 2 O. It is used for the production of copper silk , whereby cellulose is dissolved to a pulpy mass with the reagent (ammine copper (II) cellulose ), spun and then precipitated again by adding an acid .

Manufacturing

Schweizer's reagent can be made by treating copper turnings with a 20% ammonia solution containing some ammonium chloride (NH 4 Cl) and blowing air into it. It can also be produced by dissolving copper (II) hydroxide (Cu (OH) 2 ) or basic copper (II) sulfate (CuSO 4  · 3 Cu (OH) 2 ) in aqueous ammonia.

Individual evidence

  1. ↑ Wissen.de: Schweizer Reagẹns
  2. ↑ Entry on Schweizer's reagent. In: Römpp Online . Georg Thieme Verlag, accessed on January 2, 2015.
  3. ↑ Brockhaus abc - Chemistry in Two Volumes, Volume 2, Eulitz, C.-M., VEB FA Brockhaus Verlag Leipzig, 1971.