https://www.healthycanning.com/citric-acid-and-home-canning/

Its use in home canning is endorsed by the USDA: Citric Acid: A form of acid that can be added to canned foods. It increases the acidity of low-acid foods and ...

https://foodsafety.wisc.edu/assets/preservation/UWEX_addacidtomatoes.pdf

home-canned item, but home canning of tomatoes has been a staple of ... tablespoons of bottled lemon juice or ½ teaspoon of citric acid per quart of tomatoes.

https://www.freshpreserving.com/ball-citric-acid-for-preserving-tomatoes-7.5-oz.-1034059VM.html

This product provides a pantry-ready alternative to lemon juice when canning tomatoes. Citric acid lowers the pH without changing the tomato flavor like lemon  ...

http://www.homepreservingbible.com/1081-canning-tomatoes-citric-acid-vinegar-lemon/

When canning tomatoes safely at home, be sure to use tested canning recipes that add citric acid, vinegar or lemon juice. Tomatoes are a medium-acid food with ...

https://nchfp.uga.edu/how/can_03/tomato_intro.html

Selecting, Preparing and Canning Tomatoes. Introduction ... For pints, use one tablespoon bottled lemon juice or 1/4 teaspoon citric acid. Acid can be added ...

https://foodinjars.com/blog/canning-101-how-to-swap-citric-acid-for-lemon-juice-and-vice-versa/

Oct 25, 2018 ... One tablespoon bottled lemon juice = 1/4 teaspoon citric acid. When one is canning something in a boiling water bath, it is vital that that product ...

https://www.epicurious.com/expert-advice/cooking-with-citric-acid-tips-and-tricks-canning-preserving-seasoning-article

Jul 28, 2017 ... Check out our easy tips on cooking with citric acid, which makes canning, cheesemaking, seasoning, and other types of cooking fresher and ...

https://extension.colostate.edu/topic-areas/nutrition-food-safety-health/canning-tomatoes-and-tomato-products-9-341/

For pints, add 1 tablespoon bottled lemon juice or 1/4 teaspoon citric acid. Freezing is a safe, easy alternative to home canning. Frozen tomatoes and tomato ...

https://www.ag.ndsu.edu/publications/food-nutrition/why-add-lemon-juice-to-tomatoes-and-salsa-before-canning

Apr 1, 2019 ... You may have heard that adding lemon juice, citric acid or another acid to tomatoes before canning is important, but maybe you are not sure ...

https://oureverydaylife.com/how-to-use-citric-acid-in-canning-12462584.html

Jan 10, 2019 ... Citric acid is a natural preservative used as a food additive. An essential ingredient in home canning, citric acid is used to maintain a safe pH ...