Alum
 | It has been suggested that this article be split into multiple articles accessible from a disambiguation page. (Discuss) Proposed since January 2015. |
Alum is both a specific chemical compound and a class of chemical compounds.
- It means potassium aluminium sulfate, a chemical compound.
- It also means a double sulfate salt.
Examples:
History
Words like "alum" and "potash" were used before modern chemistry developed. The word 'alumen' occurs in Pliny's Natural History (23–79 AD). In the 52nd chapter of his 35th book, he gives a detailed description. Different substances were distinguished by the name of 'alumen', but they were all astringents,[1] and were all used in dyeing and medicine.
Alum Media
Crystal of potassium alum, KAl(SO4)2·12H2O
Octahedral like shaped potassium alum crystal with unequal distribution of the face area.
Tawas (powdered alum crystals), a traditional scent-less deodorant for underarm and feet odor in the Philippines and most of Island Southeast Asia
Kaliumchromalaun Oktaeder, 2,5 cm Kantenlänge
Alum crystal with small amount of chrome alum to give a slight violet color
,_a_traditional_deodorant_in_the_Philippines_01.jpg)
Notes
- ↑ Astringent: causes body tissue to shrink or contract.
