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Alum powder is a crystalline powder that is most commonly used in pickling; it keeps pickles firm and crispy.

THIS ALUM WILL NOT GROW CRYSTALS.

Alum powder is often used to firm and crispen pickles by letting them soak in a sealed brine solution of water, vinegar, salt, spices, and alum powder for several weeks. Cucumbers should be pickled at the peak of freshness because they will become soft after a few days. Use up to 1/4 teaspoon of alum per pint of solution.

Alum’s tissue-shrinking properties gave it a starring role in multiple episodes of the cartoon Looney Tunes in which alum was shown to comically shrink the characters’ heads and pucker up lips.

Ratings & Reviews

4.9
197 Ratings
5 star
93.9%
4 star
5.1%
3 star
0.5%
2 star
0%
1 star
0.5%
February 24, 2020
Excellent
, Detroit, MI
December 19, 2019
Really appreciate fast, easy service. Thank you
, Fryeburg, ME
November 7, 2018
I don't know if it is same as what you get in small jar at grocery store, I am trying to do science experiment of growing geodes on eggshells covered in alum powder. BUT it is not working after several days no, still not crystallized.
, Hamptonville, NC
October 16, 2018
IT WILL TAKE TIME TO SEE HOW IT WORKS!
, Hedgesville, WV
Showing 1-4 of 215

Ingredients

Aluminum sulfate Packaged in the same facility as peanuts, tree nuts, wheat, soy, and milk products.

More Info

Store at room temperature for up to 1 year.

Country of origin: United States

ID: 7386

Click here to read related CA Prop 65 Warning