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Ammonium aluminum sulfate
Molecular formula:
NH4Al(SO4)2•12H2O

Relative molecular weight: Aluminum ammonium sulfate dodecahydrate 453.31; Ammonium aluminum sulfate 237.13

Appearance: Colorless or white crystalline powder or block.

Uses: Sewage purification as coagulant: tannery industry used as aluminum tanning agent and after treatment agent of skin nitrate: dye industry used as anti-stain agent: paper industry used as paper sizing agent: glass industry used as yellow glass coloring agent; Medically used as an astringent, etc.; Printing and dyeing industry used as mordant: in addition, it is also used in pigments, electroplating, starch and other industrial sectors; Food grade products are used as buffering agents and leavening agents.

 

Aluminum potassium sulfate

Relative molecular weight: Potassium Aluminum sulfate dodecahydrate 474.37

Appearance: Colorless transparent or white block, granular or crystalline powder.

Usage: Mainly used in water purification, paper sizing, paint printing and dyeing, aquatic products curing, pharmaceutical, leather, rubber and colored glass industries, food industry and baking soda mixed with blowing agent.



 

Packaging: polyethylene plastic woven packaging, 50㎏ per bag.
Storage: Storage in cool, dry, ventilated warehouse, to prevent rain, moisture, sun, heat. Prevent mixing with toxic, colored and easily dyed substances. Prevent pollution.

 

Product quality standard:

Food additive Aluminum ammonium sulfate (GB886.342-2021)

Index item Standard limit
Ammonium aluminum sulfate dodecahydrate Ammonium aluminum sulfate
[NH4Al (SO4)2• 12H2O] content (calculated on a dry basis) ω%   99.5-100.5 -
[NH4Al (SO4)2] content (calculated on a dry basis) ω/% - 96.5
Moisture content ω/% 4.0 -
Loss on drying ω/% - 13.0
Selenium(Se)/(mg/kg) 30.0
Fluorine(F)/(mg/kg) 30.0
Lead(Pb)/(mg/kg) 5.0
Arsenic(As)/(mg/kg) 2.0

 

Food additive Potassium alum(GB886.229-2016)

Index item Standard limit
Potassium aluminum sulfate dodecahydrate Potassium aluminum sulfate
[AlK (SO4)2• 12H2O] content (calculated on a dry basis)/% 99.5 -
[AlK (SO4)2] content (calculated on a dry basis)/% - 96.5
Lead(Pb)/(mg/kg) 5.0 5.0
Arsenic(As)/(mg/kg) 2.0 2.0
Fluorine(F)/(mg/kg) 30.0 30.0
Selenium(Se)/(mg/kg) 30.0 30.0
Loss on drying/% - 13.0


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