Nomenclature
CAS number: 14283-05-7
Cuprammonium sulfate; ammonium cupric sulfate; cupric sulfate, ammoniated; Eau Celeste.
CuH
12N
4O
4S; mol wt 227.73.
Cu 27.90%, H 5.31%, N 24.60%, O 28.10%, S 14.08%.
[Cu(NH
3)
4]SO
4.
Description and references
Prepd by dissolving copper sulfate in ammonia
water and pptg with alcohol: Mazzi, Acta
Crystallogr. 8, 137 (1955). Crystal structure
of monohydrate: Morosin, ibid. 25B, 19 (1969).
Derivative
Monohydrate.
Properties
Large, dark blue crystals. d420 1.81. Ammonia
odor, dec in air. Loses H2O and 2NH3 on heating
to 120°, remaining 2NH3 at 160°. Soly in water at 21.5°:
18.5 g/100 ml. Practically insol in the lower alcohols.Use
In textile printing, especially in calico finishing.
As fungicide.