Salts haloid

The presence of a halogen may indicate a haloid salt of a base, alky-l, alkylcue, or aryl halide, add halide, haloid derivative of an aldehyde or aad. Some substances, like mustard oils, amino- uilphonic atids and thioamides, contain both nitiogen and sulphur. 

The haloid salts are named according to the rules for binary compounds above given, thus ... 

This reaction is effected by treating ammonia or a primaiy or secondary monamiue with the haloid salt (preferably a bro< mide) of the dyad radical, Idms... 

The haloid salts of the amines may also be produced by the union of the haloid ethers of the monad positive radicals with the amines (for reaction see p. 366). 

Table XXIV.—Volume Relations op some Haloid Salts.

But the only salt6 of iron of great commercial importance are the protosulphate or green vitriol, and the double haloid salt, the ferrocyanide of iron, better known as prusdan blue. To these the Editor-will, therefore, confine his attention iu what follows but, In connection with the latter, it will be necessary to describe the preparation of another important salt, in which iron occurs as an element, the sesqttiferro-cyanide of potassium, known commercially as prumate of potassa. 

Some colouring matters containing chlorine, such as eosin, may leave ash containing haloid salts. In this case the solution of the colouring matter, addified with sulphuric acid, may be extracted with ether and the aqueous liquid tested for chlorine and sodium. 

Haloid salts may be formed by direct union of their constituent elements oxysalta are never so produced. 

This reaction goes on better in the presence of hydrochloric acid or haloid salts. 

Papers with fire-resistant properties are used for wallpaper, decoration paper, Chi-nese/Japanese lamps and partition walls. Flame retardants are added either at the wet end or by surface treatment in the paper production process. They either release incombustible gases on heating, which prevent the entry of atmospheric oxygen, or when heated produce a nonflammable melt that surrounds the paper. Chemicals for this purpose include calcium chloride, magnesium chloride, diammonium ethyl phosphate, and mixtures of zinc borates, antimony oxides, and organic haloid salts as well as inorganic bromides and oxybromides. 

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