Is this allum potassium alum? it doesn't say what kind of alum it is and there are many kinds chemically speaking.

The kinds of alum used for food is typically potassium alum. This is the case in McCormick's Alum, as well.

what are the benefits ??

Alum (potassium aluminum sulfate) is a food additive that is ideal for pickling and canning. It helps create crisp pickled fruits or vegetables. ~ Erica

Can I use this powder to purify drinking water in a vessel

No, it is used to clarify water not purify.

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McCormick Alum, 1.9 oz

Product ID: 1534654

Details

Brand
McCormick
Item Form
Solid
Item Weight
2.45 ounces
Number of Items
1
Unit Count
1.9 Ounce

🥒Keeps pickles & veggies crisp

🧊1.9 oz pure alum powder

♻️Kosher, vegan & clean label

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Description

🥒 Elevate your pickling game with McCormick Alum — crunch that commands attention!

PURE PREMIUM - McCormick quality alum ensures consistent, food-safe results every time.
MULTI USE MAGIC - Ideal for pickling, canning, and even extending the life of fresh flowers.
CRUNCH PERFECTED - Locks in that irresistible crispness for pickles and fresh produce.
CLEAN CONSCIOUS - Kosher certified, vegan, and free from high-fructose corn syrup—pure ingredient confidence.
COMPACT CONVENIENCE - 1.9 oz flip-top bottle designed for easy measuring and storage in any kitchen.

McCormick Alum is a premium 1.9 oz crystalline powder designed to keep pickled fruits and vegetables firm and crispy. Trusted for its food-safe purity, this kosher-certified, vegan-friendly additive is perfect for professional and home canners seeking that perfect crunch. Beyond pickling, it also helps preserve fresh flowers, making it a versatile kitchen essential.

Specifications

ASIN	B008KQAS3U
ASIN	B008KQAS3U
Age Range Description	Adults
Best Sellers Rank	#4,892 in Grocery & Gourmet Food ( See Top 100 in Grocery & Gourmet Food ) #1 in Alum Thickeners
Brand Name	McCormick
Coin Variety 1	Watermelon
Color	Multicolor
Container Type	Flip-Top Bottle
Cuisine	Universal
Customer Reviews	4.6 4.6 out of 5 stars (1,673)
Diet Type	Vegetarian
Flavor	Unflavored
Global Trade Identification Number	00052100002149
Is Discontinued By Manufacturer	No
Item Form	Solid
Item Package Quantity	1
Item Package Weight	0.07 Kilograms
Item Weight	2.45 ounces
Item model number	052100002149
Manufacturer	McCormick & Company, Inc.
Manufacturer	McCormick & Company, Inc.
Model Number	052100002149
Number of Items	1
Number of Pieces	1
Package Size Name	1.9 oz
Part Number	052100002149
Product Dimensions	1.8 x 1.8 x 2.2 inches; 2.45 ounces
Size	1.9 Ounce (Pack of 1)
Specialty	Kosher Certified, Vegan, Vegetarian, high-fructose-corn-syrup-free, low-carb
Unit Count	1.9 Ounce
Units	1.9 Ounce

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TrustScore 4.5 | 7,300+ reviews

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