By compounds of two or more kinds of pure substance composed of different elements. Between different atomic composition of this compound will exist to a certain percentage, in other words, the compound regardless of the source, which have a certain composition. In everyday life, sodium chloride, and distilled water (water) n-propyl acetate market, it is common compounds. From these compounds, it was found that their properties are different from each other, a sodium salt and chlorine atoms composed; sugar carbon, hydrogen and oxygen atoms consisting of; hydrogen combustion reaction of oxygen in the water. The fact that the price of n-propyl acetate, showing two kinds or more substances may be produced by the reaction of a new substance, which is a new compound material. Nature of the new material properties and raw material are completely different. Whereby usual way on a chemical to determine whether the quality of the property compound. And if a pure substance can be decomposed into two or more kinds of quality, then the quality will be for the original compound. E.g., molten salt, energized, and completely decomposed into sodium chlorine atom, it is chlorine compound as a salt and hydrogen are non-metallic elements, it is easy to obtain not only a chlorine atom electrons forming a stable structure outermost electrons 8 and hydrogen atoms are easy to obtain an electronic form a stable structure outermost two electrons. The degree of atomic electrons get these two elements of less difficulty Beijing n-propyl acetate, so neither can the other side of the electronic capture over. Results atom interacting with two elements is each side to the outermost one electron to form a pair of electrons. This electron pair is shared by two atoms in both space outside the nucleus motion n-propyl acetate, so that both parties outermost have reached a stable structure. This electron pair, called the shared electrons pair. Shared electronic molecules together by two nuclear attract, the two atoms form compounds. In the hydrogen chloride molecules, because of the chlorine atoms of the electron slightly stronger than the attraction of a hydrogen atom, a chlorine atom deflection of the electron one, and therefore one of a chlorine atom slightly negatively charged, one slightly positively charged hydrogen atoms, but as electrically neutral molecule as a whole continued to show. Such as hydrogen chloride at a common electronic form molecular compounds, called covalent compounds. Such as water, carbon dioxide and other covalent compounds are n-propyl acetate purposes, Heilongjiang Province, n-propyl acetate, dry chemical Xiang Xiang dry by the Jinan Chemical Co. Jinan Cheung Dry Chemical Co. (www.xiangqianhuagong.com) (www.dilunyierchun.com) strong, credible, in Jinan, Shandong alcohol industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Cheung dry chemical into the brilliant and you work for a better future!