Phosphoric acid

This page is in progress
Please check back later for additional changes

Phosphoric acid (H₃PO₄) is a mineral acid sometimes used to lower mash pH. It has minimal flavor impact because the malt also contains large amounts of phosphates. However, using it runs the risk of precipitating an increased amount of calcium from the water, making it unavailable for later processes.

Where to purchase:

• Phoshoric acid (10%) 4oz from MoreBeer
• 1 Quart / 950ml 85% Food Grade Phosphoric Acid from Amazon

To make 30 mL 25% phosporic acid for the SO₂ testing kit from 85% phosphoric acid: use 21.2 mL distilled water and 8.8 mL 85% phsoporic acid.