Rock of alum | |||
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Rock of alum. This is a hunk of potassium alum, used for many things but sold retail in this form primarily as a deodorant. Source: eBay seller saratthasamuccaya Contributor: Theodore Gray Acquired: 8 February, 2009 Text Updated: 8 February, 2009 Price: $6/pound Size: 3" Composition: KAl(SO4)2.12H2O | |||
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