Phosphoric Acid (10%) - 4 oz.

Phosphoric Acid (10%) - 4 oz.

In Stock
60 day no hassle return policy. Details

10% concentration. Phosphoric acid is said to be tasteless while lactic in large quantities can potentially leave flavor. Being a lower conentration than the Lactic, it is slower to change the pH of your water and therefore more forgiving to use.

Shipping Restricted: This product is only eligible for ground shipment within the contiguous 48 states.
Item # WM54
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.25 LBS
Community Q&A

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Browse 2 questions Browse 2 questions and 56 answers
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Mash pH adjustment
Darrell Burk on Oct 20, 2020
I always use Lactic. Thought I'd try Phosphoric for a bit.
Mike W on Aug 11, 2020
Mash pH adjustment
Darrell Burk on Oct 20, 2020
for adjusting mash acidity
Michael G on Sep 19, 2020
I always use Lactic. Thought I'd try Phosphoric for a bit.
Mike W on Aug 11, 2020
pH adjustment
Jason M on Aug 11, 2020
Lowering mash pH
Jacob H on Aug 7, 2020
Because I ran out
Kuumba S on Jul 25, 2020
To adjust mash pH
Bryan A B on Jul 22, 2020
pH adjustment on tap water.
Mark W Johnson on Jul 21, 2020
Ph control
sean r on Jun 13, 2020
David S on Jun 12, 2020
acidifying sparge water
Jennifer V on May 26, 2020
Price and availability
Doug C on May 16, 2020
water treatment kit
Devin B on May 9, 2020
finishing up my water additions toolbox
Gary Haygood on Apr 17, 2020
Water adjustments
Brandon L on Apr 3, 2020
Brulosophy xBmt says phosphoric may be a better choice than lactic
Christian Knoebel on Mar 24, 2020
Mash water ph adjustment
Robert J on Jan 28, 2020
pH control
Oliver I on Jan 16, 2020
Mash ph adjustment
Robert J on Dec 31, 2019
Steve H on Dec 23, 2019
Water ph
Sean F on Dec 13, 2019
Brewing water adjustments
Daniel G on Dec 10, 2019
Water treatment
Mainefolks on Dec 1, 2019
Lower brew water pH
Brandon W on Nov 18, 2019
pH adjustment - just right
Bob Z on Nov 2, 2019
Simplicity of use.
Troy E on Sep 5, 2019
water alkalinity adjustment
joseph j on Jul 25, 2019
To lower sparge water ph
Bonnie P on Jul 25, 2019
Flavorless acid for mash/boil pH adjustment
Tom l on Jul 22, 2019
High TA/High pH wine adjustment
Paul K on May 28, 2019
Small package, I'll be attempting to adjust my water chemistry for the first time.
JAMES MICHAEL HILL J on May 15, 2019
Ph reduction
John F on Apr 11, 2019
Thought I would Try it
James Reneau on Apr 3, 2019
Wanted a cleaner tasting acid than lactic Acid
Kenton C on Mar 15, 2019
To lower pH in mash before kettle souring
Eric P on Feb 26, 2019
Water treatment for all-grain brewing.
Mitch S on Feb 7, 2019
Need it
Justin W. S on Feb 6, 2019
11% was too much acidity; 9% was weak tea.
John Burrow on Feb 1, 2019
need to correct for pH.
Michael P on Jan 8, 2019
PH management
Russell Windham on Dec 31, 2018
Lower ph
Eric K on Nov 28, 2018
Use regularly to acidify mash
William R on Oct 22, 2018
Adjust mash ph
Rich on Oct 11, 2018
Preferred mash pH control acid (25% is better, though)
Tom l on Sep 20, 2018
adjust water profile
Gunnar A on Sep 15, 2018
works good for lowering mash PH
Timothy Hooks on Aug 28, 2018
Valued C on Jul 28, 2018
Mash ph
gino p on Jul 24, 2018
to adjust the pH of my mash
Greg V on May 23, 2018
adjust pH
Arlin M on May 21, 2018
for adjusting mash acidity
Michael G on Sep 19, 2020
pH adjustment
Jason M on Aug 11, 2020
I see no label on the bottle. Dose this come with instructions?
fletcher little on Jan 25, 2018
BEST ANSWER: The bottle does come with a printed label that has the product information. The dosage rate will vary based on your application and water profile.

4.6 / 5.0
10 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Reduces PH with no flavor impact
I like to use Phosphoric acid to reduce the PH of my strike water. Easy to measure and I don’t have little powder piles in the bottom of the kettle.
June 10, 2020
4 months ago
Just a little will do.
July 19, 2018
over 2 years ago
lower the ph of your water
I started using this a couple of years ago. It (along with cal chl and a few other additions) makes it easy to hit the ph in the mash. Any mash, not just the dark beers.
March 24, 2018
over 2 years ago
Sadly this is the largest size bottle
Seems strange that you can order 100 of them, but not in a single bottle larger than this.
February 9, 2018
over 2 years ago
Lower Ph
Works great to lower mash water to 5.2 before sparging
May 29, 2015
Easier than Latic acid
Instead of the 88% Latic acid the 10% acid enabled me to dial in my mash ph to within .03, I be happy
May 27, 2015
Easy to bring pH down for mashing and sparging
4 ml is enough to bring my spare water of 8 gallons to 5.4 pH.
No influence on the beer flavor and easy to use as it is not full strength.
May 9, 2015
Works as expected
Use this for my Milwaukee PH meter.
May 6, 2015
Great for pH adjustment
Better than Lactic acid for mash pH adjustment. 10 percent strength is perfect for my small batch brewing
May 5, 2015
Works good
good product just wish I could buy larger volume
May 5, 2015