Potassium alum has been used in shaving, water purification, and food preservation for millennia. Here's what it actually is.
What it is
Potassium alum (chemical name: potassium aluminum sulfate, formula KAl(SO₄)₂·12H₂O) is a naturally occurring mineral salt. It forms colorless crystals that grind into a fine white-to-tan powder.
Where it comes from
Found naturally in volcanic regions and as a mineral deposit. Today, most commercial potassium alum is manufactured from aluminum hydroxide and potassium sulfate, then crystallized and ground to powder.
A 4,000-year history
Ancient Egyptians used alum as a deodorant and dyeing fixative. Ancient Greeks used it for water purification. Romans used it in leather tanning. Medieval Europeans used it for paper sizing. And barbers — at least since the 1800s — have used it as the active styptic ingredient in pencils, blocks, and powders.
How it stops bleeding
Potassium alum is an astringent. When applied to a cut, it causes localized vasoconstriction (small blood vessels contract) and helps proteins in the wound coagulate. The combined effect closes the cut quickly.
Modern uses beyond shaving
Still used in water purification (as a flocculant), food preservation (as a firming agent in pickles), and even fire extinguishers. The "alum" in pickle recipes is exactly the same compound.
Why we use it
StyptiQ is pharmaceutical-grade potassium alum, milled to a fine consistency, packed in a 2 oz aluminum tin. No fillers, no fragrance, no additives. The same ingredient barbers have trusted for two centuries — just in a properly built modern format.
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