Physical Property: Astringent taste; the relative density of 2.532; melting point 851 ℃; solubility 21g 20 ℃. Chemical properties: Strong stability, but also can be decomposed at high temperature to produce sodium oxide and carbon dioxide. St

Physical Property: surface density: 0.35-0.9g/cm3, melting 622 degrees Celsius Chemical properties: Solubility soluble in water, the water is alkaline solution. Appearance: A white particle or powder Usage: For meat processing, textiles, dyeing, synthe

Physical Property: Melting point: 772 degrees Celsius (otherwise material called 782 degrees Celsius);Boiling: more than 1,600 degrees Celsius;The relative density: 2.15 Chemical properties:Soluble in water (emit hot), ethanol, acetone, acetic acid,

Physical Property:Melting point 616 ℃ (decomposition), the relative density of 2.484g/cm3 (20 ℃), soluble in water. Chemical properties:highly hygroscopic. Gradually absorb water placed in the air exposed, it become web results showed viscose

Physical Property: Density 1.04 Melting point 560 ° C (dec.)Water-soluble 203 g / L (20 ° C) Chemical properties: Anhydrous copper sulfate is heated to 923K, the decomposition into CuO Appearance: Large granular dark blue granular crystal or crystal

Physical and Chemical property : melting point： 770℃ soluble in water and not easy to weathering and keeping stable, heating can dehydrate. Al2(SO4)3(high temperature)→Al2O3+sulfur oxides Appearance: schistose，granulous a

Physical and Chemical property: Soluble in water with strong adsorption, in the process of hydrolysis accompanying with electrochemical, coacervation， adsorption and deposition and other physical changes Appearance: achromatic color or yellow r

Physical and Chemical property: strong SO2 odour, proportion is 1.4, melting point >300℃, density 1.48 solubility: soluble in water ,alcohol, and acetone and in acidic solution, Na2S2O5+ strong acid →SO2+salt, Na2S2O5+O2→Na2S2O6,

Chemical properties: Soluble in water and glycerine, slightly soluble in ethanol. Reagents used for chemical analysis to determine the content of arsenic and phosphorus, also used as a disinfectant, mordant, etc. Appearance: White granular or crystalline

Physical and Chemical property:melting point >300 Ignition temperature 250℃ Solubility: insoluble in ethanol, soluble in sodium hydroxide solution. Strong reaction and burning occur in water . Appearance:White arenoid crystalline or light yell