English En

Aluminium potassium sulfate dodecahydrate, Pharmpur®, Ph Eur, BP, USP

- Synonyms: Potassium aluminium sulfate, Alum potassium, Potassium alum
- KAl(SO4)2·12H2O
- M = 474,39 g/mol
- CAS [7784-24-9]
- EINECS-No.: 233-141-3
- Solub. in water: (20 ºC): 139 g/l
- Melting point: 90 ºC
- Tariff number: 2833 30 00 00
- Applications: analytical chemistry, manufacture of dyes, manufacturing of lacquers, in explosive compositions.
- Appearance: Blanco y Cristalino

SPECIFICATIONS
assay (complexometric): 99,0 - 100,5 %
assay (complexometric, referred to dried basis): 99,0 - 100,5 %
Identification sulfates: passes test
Identification aluminium: passes test
Identification potassium: passes test
Identification A (USP): passes test
Identification B (USP): passes test
Identification C (USP): passes test
appearance of solution: clear and colourless
pH (10 %, H2O): 3,0 - 3,5
ammonium (NH4): max. 0,2 %
iron (Fe): max. 100 ppm:
iron (Fe): passes test
loss on drying : 43,0 % - 46,0 %