Is my hot sauce an acidified food?

Most shelf-stable hot sauces are acidified foods under federal law. If you take peppers, garlic, onion or carrot (all low-acid foods), add vinegar, citrus juice or another acid to bring the finished sauce to pH 4.6 or below, and sell it in a sealed bottle meant to sit at room temperature, the sauce fits the definition in 21 CFR 114.3(b) [1]. Three things can take a sauce out of that definition: it is naturally an acid food, it is a condiment that is mostly acid with only a little low-acid food in it, or it is kept cold from your kitchen to the buyer's fridge. This page quotes the rule, applies the exclusions to real sauces and lists what coverage requires.

The definition, word for word

The federal acidified foods regulation is 21 CFR Part 114, current on eCFR as of October 20, 2026 [1]. Section 114.3(b) reads:

"Acidified foods means low-acid foods to which acid(s) or acid food(s) are added; these foods include, but are not limited to, beans, cucumbers, cabbage, artichokes, cauliflower, puddings, peppers, tropical fruits, and fish, singly or in any combination. They have a water activity (aw) greater than 0.85 and have a finished equilibrium pH of 4.6 or below. These foods may be called, or may purport to be, "pickles" or "pickled ______." Carbonated beverages, jams, jellies, preserves, acid foods (including such foods as standardized and nonstandardized food dressings and condiment sauces) that contain small amounts of low-acid food(s) and have a resultant finished equilibrium pH that does not significantly differ from that of the predominant acid or acid food, and foods that are stored, distributed, and retailed under refrigeration are excluded from the coverage of this part." [2]

Peppers are named in the first sentence. That is why regulators, process authorities and extension specialists start from the assumption that a pepper sauce is acidified until someone shows otherwise.

The same section defines the other categories you need [2]:

• Acid foods (114.3(a)) are foods with a natural pH of 4.6 or below. Tomatoes, most citrus and vinegar itself are acid foods.
• Low-acid foods (114.3(d)) are foods other than alcoholic beverages with a finished equilibrium pH above 4.6 and a water activity above 0.85. Fresh peppers, garlic and onion fall here. Tomatoes and tomato products with a finished equilibrium pH below 4.7 are not classed as low-acid.
• Water activity (114.3(h)) measures free moisture. Almost every hot sauce is well above 0.85, so the water activity line rarely helps a sauce maker. Water activity has its own page.

"Finished equilibrium pH" means the pH after the acid has spread evenly through every piece of the sauce, which can take hours or days. Equilibrium pH explains how to measure it.

Why pH 4.6 is the line

Spores of Clostridium botulinum will not germinate and produce toxin at or below pH 4.6, which is why both acid and acidified foods are defined by that number [3]. Holding pH at or below 4.6 controls botulism. It does not kill acid-tolerant bacteria such as E. coli O157:H7, Salmonella and Listeria monocytogenes, so acidified foods also need a heat step or a validated hold [3]. The safe pH target and why filed processes usually sit well under 4.6 live on what pH hot sauce needs to be.

Sorting your sauce into a category

The table uses common hot sauce styles. It shows where each usually starts. A process authority makes the actual call for each formula.

The condiment sauce exclusion, read carefully

The exclusion is narrow. It covers acid foods, including "condiment sauces," that contain "small amounts" of low-acid food and whose finished pH does not significantly differ from the main acid ingredient [2]. The regulation gives no percentage for "small" and no number for "significantly." A sauce that is half pepper mash and half vinegar has a lot of low-acid food in it, and its pH will sit noticeably above the vinegar's. Process authorities test the formula and classify it.

Here is what an acid food classification looks like on paper. A Kansas Value Added Foods Lab process authority letter dated May 28, 2026 classified a barbecue sauce as "a Formulated Acid Food" and stated it was "Exempt from process filing (2541e) and registration with the FDA using form 2541" [5]. The same letter still set a heat step (160°F for at least 10 minutes) and required lot codes, pH testing records and a recall procedure [5]. Acid food status lifts the federal filing. The rest of running a safe food business stays.

Who classifies the product

You do. FDA's 2010 draft guidance described the processor as the one who concludes whether a product is an acidified food, and said FDA would review submitted process information to check whether it agreed [4]. That draft never became final, and FDA withdrew it in part on December 30, 2015 (80 FR 81550) [9], so it shows FDA's approach and binds no one. In practice your conclusion needs to rest on a written classification from a process authority, because an inspector who disagrees will ask what you based it on. Georgia's step-by-step bulletin builds the classification into the process: a test batch goes to UGA Extension Food Science, which classifies the product as acid or acidified, and acid products skip the federal filing steps [6].

What being covered requires

If your sauce is an acidified food, these are the federal duties. Each has its own page in this chapter.

1. A scheduled process set by a qualified person. Section 114.83 says the process "shall be established by a qualified person who has expert knowledge acquired through appropriate training and experience in the acidification and processing of acidified foods" [1]. See what a scheduled process is and finding a process authority.
2. Registration and process filing with FDA. Under 21 CFR 108.25(c), you register on Form FDA 2541 within 10 days of first making acidified foods and file each process on Form FDA 2541e within 60 days of registration and before packing any new product [7]. See FCE registration and process filing.
3. A trained supervisor. Section 114.10 requires operations to be supervised by someone who completed an FDA-approved school [1]. See Better Process Control School.
4. Process controls and pH testing. Section 114.80(a)(1) requires a finished equilibrium pH of 4.6 or lower "within the time designated in the scheduled process and maintained in all finished foods", plus a thermal process that destroys vegetative cells of concern [1]. See critical factors.
5. Lot codes on every container. Section 114.80(b) requires a code identifying the establishment, product, and the year, day and period of packing [1].
6. A plan for deviations. Section 114.89 lists what to do when a batch misses its process [1]. See when a batch misses its limits.
7. Records kept 3 years. Section 114.100(e) requires processing, deviation and distribution records to be kept "for a period of 3 years from the date of manufacture" [1]. See batch records.
8. Reporting and recall procedures. Section 108.25(d) requires prompt reports to FDA of health-significant spoilage, deviation or contamination once product has entered commerce, and 108.25(e) requires current recall procedures [7].

Section 114.5 ties this together: the criteria in 114.10, 114.80, 114.83, 114.89 and 114.100 are what FDA applies in deciding whether an acidified food is adulterated [1].

These are federal requirements. Your state may add a processor license, and some states let home producers sell acidified sauces under cottage food rules with their own conditions. Selling hot sauce in your state covers that. Confirm your classification and duties with your state agriculture department and with FDA (LACF@FDA.HHS.GOV) [8].

If your sauce is acidified, start with the scheduled process

Once you know the sauce is covered, the first document you need is the scheduled process, because every filing, record and inspection question refers back to it. What a scheduled process is explains what goes in it and how it ties to your batch records. If your sauce is fermented, read is a fermented sauce an acidified food first.

References

1. U.S. Food and Drug Administration, 21 CFR Part 114, Acidified Foods, eCFR, up to date as of October 20, 2026. https://www.ecfr.gov/current/title-21/chapter-I/subchapter-B/part-114
2. Legal Information Institute, Cornell Law School, 21 CFR 114.3 Definitions (44 FR 16235, Mar. 16, 1979, as amended at 61 FR 14245, Apr. 1, 1996), accessed October 2026. https://www.law.cornell.edu/cfr/text/21/114.3
3. Breidt, F., Sandeep, K. P., and Arritt, F. M., Use of Linear Models for Thermal Processing of Acidified Foods, Food Protection Trends 30(5):268-272, 2010. https://site.extension.uga.edu/foodscienceandtechnology/files/2023/07/Breidt-et-al-2010-Below-4.1.pdf
4. U.S. Food and Drug Administration, Draft Guidance for Industry: Acidified Foods; Availability, 75 FR 59268, Docket FDA-2010-D-0434, September 27, 2010. https://regulations.justia.com/regulations/fedreg/2010/09/27/2010-24089.html
5. Kansas Value Added Foods Lab (Kelly Getty), Process Authority Letter, Best BBQ Sauce, May 28, 2026, published by the Kansas Department of Agriculture. https://www.agriculture.ks.gov/home/showpublisheddocument/16190/639162476338400000
6. Mohan, A., Step-by-Step Guidelines for Processing, Manufacturing, and Regulatory Approval of Acidified Foods in Georgia, UGA Extension Bulletin B 1455, November 2015. https://secure.caes.uga.edu/extension/publications/files/pdf/B%201455_1.PDF
7. U.S. Food and Drug Administration, 21 CFR 108.25 Acidified foods, eCFR, up to date as of October 20, 2026. https://www.ecfr.gov/current/title-21/chapter-I/subchapter-B/part-108/subpart-B/section-108.25
8. U.S. Food and Drug Administration, Establishment Registration and Process Filing for Acidified and Low-Acid Canned Foods (LACF), content current as of May 29, 2025. https://www.fda.gov/food/registration-food-facilities-and-other-submissions/establishment-registration-process-filing-acidified-and-low-acid-canned-foods-lacf
9. U.S. Food and Drug Administration, Acidified Foods; Draft Guidance for Industry; Withdrawal of Draft Guidance (in part), 80 FR 81550, December 30, 2015. https://www.govinfo.gov/content/pkg/FR-2015-12-30/html/2015-32781.htm