Flake, HeGongSe, soluble in water, soluble in alcohol, ether, insoluble in water, the strong alkali in air is easy oxidation, toxic. The strong smell solution, because the method of S2 - the formation of hydrogen sulphide hydrolysis. Pure method for colorless crystalline powder. Hygroscopic, soluble in water. A strong alkali solution. Touching skin and hair caused burnable. Therefore LiuHuaJian known method. The method of solution in the air will slowly oxidation sulfur and sodium, as sodium, sodium and method. Because of the sulfur and sodium generated faster, so is the main product oxidation sulfur and sodium. The method in the air, and ChaoXie carbonization and metamorphism, constantly release hydrogen gas. Because of its industrial method containing impurities are pink color, palm red, yellow. Gravity, melting, boiling point, but also because of impurity influence. When exposed to the method of humid air, Na2S and its hydrate ejective hydrogen sulfide.