Ammonium persulfate

Ammonium persulfate

Monoclinic, colorless crystals

Fixed

1.98 g · cm -3

120 ° C ( decomposition)

Soluble in water ( 620 g · l-1 at 20 ° C)

Risk

Template: Infobox chemical / molecular formula search available

Ammonium is a salt-like chemical compound consisting of ammonium and peroxodisulfate. It has the formula ( NH4) 2S2O8

Representation

Ammonium peroxodisulfate is produced by anodic oxidation of ammonium sulfate or ammonium hydrogen sulfate.

Properties

Ammonium is a salt of peroxodisulfuric acid. It forms white crystals with a slight green fluorescence. Ammonium peroxodisulfate is a strong bleaching and oxidizing agent and a strong free radical generator. It must be stored dry, as it decomposes in the presence of moisture or in warm, aqueous solutions with the release of ozone. Peroxodisulfates decompose upon heating to form sulfate radicals. Below are the decomposition of the Peroxodisulfations in two sulfate radicals.

Application

Ammonium is a polymerization initiator in the manufacture of polyacrylamide gels and used based on acrylic derivatives in the production of superabsorbent polymers as a thermal radical initiator. The sulfate radicals formed in the decomposition can open the same by the electrophilic attack on carbon atoms with a double bond and thus start a chain reaction. In addition, it can be used as an oxidizing agent and etching of printed circuit boards. In the chemical analysis, it is used for the separation of manganese and chromium. In the photo development, it is an attenuator.