Potassium aluminum sulfate dodecahydrate 7784-24-9


Product Deail


Potassium aluminum sulfate dodecahydrate

Another name】Alum; Potassium alum; Aluminium potassium alum.

Description】Colorless transparent crystal or powder, taste slightly sweet and astringent. Melting point 92.5℃, 64℃ lost 9 crystal water, 200℃ lost 12 crystal water. Soluble in water and glycerin, aqueous solution is acidic, insoluble in alcohol and acetone.

Test items

AR

CP

Other

Assay[KAl(SO4)2•12H2O] /%

≥99.5

≥99.0

Custom

pH(50g/L,25℃)

3.0-3.5

3.0-3.5

Clarity of solution /#

≤3

≤4

Water insoluble /%

≤0.005

≤0.01

Chloride(Cl) /%

≤0.000 5

≤0.004

Ammonium(NH4) /%

≤0.005

≤0.01

Arsenic(As) /%

≤0.000 05

≤0.000 1

Sodium(Na) /%

≤0.02

≤0.05

Iron(Fe) /%

≤0.001

≤0.002

Heavy metals (as Pb) /%

≤0.000 5

≤0.002

Use】As an analytical reagent; Water purifier. Paper additives; Pharmaceutical industrial preparations; Food additives; Bacterial stain; Photographic plate making.