noun[as modifier] Chemistry
A complex ion, Cu(NH3)42+, formed in solution when ammonia is added to copper salts. The solution is deep blue and is used to dissolve cellulose.
- By contrast, the cuprammonium rayon fibers are made from cotton linters as main raw material.
- If ammonia is added to a copper compound then a deep blue solution called cuprammonium hydroxide is formed.
- The two most commonly used production methods for rayon are the cuprammonium process and the viscose process.
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