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Aluminum potassium sulfate dodecahydrate is a kind of inorganic substance, also known as alum. The Chemical formula is KAl(SO4)2·12H2O, which is a double salt of potassium sulfate and aluminum sulfate containing crystal water [1]. Soluble in water, insoluble in ethanol. Alum taste sour and astringent, cold; It can also be used for preparing aluminum salt, baking powder, paint, tanning material, clarifying agent, mordant, paper making, waterproofing agent and so on. It is often used for water purification in daily life. Because long-term consumption of food additives containing aluminum is very harmful to human body, especially to children's growth and intelligence will affect, the country has banned its use in food additives.

Product name: Aluminum potassium sulfate dodecahydrate Kalinite 
Alias: Aluminium potassium sulfate dodecahydrate; aluminum potassium sulfate hydrate (1:1:2:12); aluminum potassium sulfate dodecahydrate 
Chemical formula: KAl(SO4)2·12H2
Molecular weight: 474.388399 
CAS: 7784-24-9 
EINECS: 233-141-3 
Melting point: 92 ℃ 
Boiling point: 330 ℃ 
Water solubility: soluble (solubility: about 5.90g) 
Density: 1.757 g/cm3
Appearance: Colorless cubic crystal, usually octahedral in appearance
Application: as water purifier, fire extinguishing agent, medicine, buffer; Preparation of aluminum salt, paint, tanning materials
Safety description: S26;S37/39 
Hazard symbol: R22;R36/38 
CID: 62667 
Dangerous goods mark: Xn:Harmful 

Physical properties:
Appearance and Properties: Colorless transparent block crystal or crystalline powder
Nose and taste: odorless, slightly sweet and sour.
Solubility: easily soluble in water, slowly soluble in glycerol, insoluble in ethanol, acetone.
Melting point (℃): 92(lit.) 
Boiling point (℃): 330at 760 mmHg 
Density: 1.757g/cm
Vapor pressure (kPa,25ºC): 1mm HG

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