Ammonium bromate, decomposition

Ammonium bromate is very unstable [51], and decomposition at about 270 K may be expressed as ... 

In absence of moisture and organic matter it is stable towards heat and light but in presence of water it darkens slowly at ordinary temperatures, and rapidly at high temperatures, while the presence of such an impurity as dust induces explosive decomposition of the heated bromate. It can be employed as a standard in iodometry. Its solution in ammonium hydroxide yields crystals of the formula Ag(NH3)2Br08. 

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