Chromium potassium sulfate dodecahydrate CAS NO.7788-99-0

Details:

Description: 

Chromic potassium sulfate is black purple glossy crystal or light purple particles or powder. Dissolved in water, the solution turns purple when cool. Green when hot, insoluble in alcohol. Toxic. It is easy to make large particles crystal. The relative density is 1.826 (25℃). Melting point 89℃. When heated to 100 ° C, 10 crystalline waters are lost, and when heated to 400 ° C, 12 crystalline waters are lost and become anhydrous. Soluble in water, dilute acid, insoluble in alcohol. Soluble in water as a purplish-red solution, heated to 70℃ becomes a green solution, after cooling gradually purple. Moisture absorption, weathering in dry air.

Preparation: 

98% potassium dichromate and 98% sulfuric acid were dissolved in the mother liquor of chromium alum according to the theoretical amount, and wood chips were slowly added under stirring for reduction. The reaction temperature is controlled at no more than 80℃, after the end of the reaction, the slow crystallization is left, the mother liquor is separated by centrifugation, the crystallization is washed with a small amount of cold water, and then dried at low temperature to obtain chromium-potassium sulfate finished product. The equation is as follows: 2K2Cr2O7+8H2SO4+40H2O+3C→4KCr(SO4)2·21H2O+3CO2↑

 

Melting Point	89 °C
Density	1.83
Storage Condition	Store at +15°C to +25°C
PH	Soluble in water
Water Solubility	3 (50g/l, H2O, 20℃)
Merck	24 g/100 mL (15 ºC)
Sensibility	14,2229

 

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hebei yanxi chemical  co., LTD who registered capital of 10 million yuan, nearly to $2 million, we have a pharmaceutical raw materials factory production of pharmaceutical raw materials, and a reagent r&d center, and we do research and development production of reagent tens of thousands of species. our aim is quality strives for the survival. Seek development by credit reputation. Our products have big price advantage in Europe South America and so on .and Our company also has the advantage of high quality in Africa. in the past two years our products has reached more than 30 countries in the world, Europe. South America. North America, southeast Asia, Africa, etc. We welcome all over the world with the best quality and lowest price friend common cooperation and common development!

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