Phosphoric Acid 85% - High Purity Industrial Grade - Premium Multi-Purpose Use for Cleaning, Etching, Rust Removal, and More. (1000mL)

Seems to work as intended. Thanks

Purchased this item to adjust water pH for brewing beer, but I had a question about whether or not it is considered "Food Grade". Bottom line - it is. I inquired with the manufacturer and their response was "yes, it is food grade". The bottle indicates "Reagent Grade", which means it is of high quality/purity.

Came in 4 quarts instead of a gallon but that just made it easier for me to not have a full gallon open. But I only need about a pint at a time for dilution to 25%

Good buy

Took care of nasty bathroom rings

I have used 85% Phosphoric Acid for brewing water pH adjustment for many years. The water I use for brewing is around a pH of 8. I use a little under a tablespoon to adjust the pH from 8 to 5.2-5.3. The typical 10% phosphoric acid solution you can buy in most homebrew shops would last for two brewing sessions. This is a great product for brewing water pH adjustments. If you use it, be extremely careful because this strength will "burn" you, your floors, counters, carpet and anything that is not acid resistant. Wear safety glasses to protect your eyes. If used properly and safely this is a great product for brewing water adjustment.

Received product wasn't Reagent grade as pictured, nor was it labeled "Meets ACS, FCC Specs". I contacted the seller and was told "We currently only stock one grade of phosphoric acid, This product we sell meets and exceeds food grade." Good enough for my uses, but inaccurate listing.

Ok