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Acidity and food safety

Getting a scheduled process

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The scheduled process is the document that turns a recipe into a manufacturable product. Everything else in this section exists to produce it or to comply with it.

What the document contains

Critical limits and how you verify them. Typically: the target pH and the maximum allowed, the acidification method, how long the product must equilibrate before measurement, the fill temperature and hold if one applies, the container and closure specification, and the records required for each batch.

It is specific to the product as submitted. It is not general advice about hot sauce and it does not transfer to your next recipe.

What it costs and how long

Fees vary widely, and a state extension program is usually far cheaper than a private consultant and sometimes free to residents. Turnaround runs to weeks and lengthens in the spring.

Budget for re-evaluation. A change that alters viscosity, particle size or the acidification route can require the process to be revisited, and that is a second fee and a second wait.

One per product, not one per business

This is the part producers get wrong at scale. Each distinct formulation generally needs its own filing. A line of six sauces is six evaluations, not one.

That is worth knowing before you design the line. Producers who launch with one sauce and add flavors find the regulatory cost grows with the range rather than with volume, which is the opposite of how ingredient cost behaves.

Living inside it

Once you have it, the job is to stay inside it and to show that you did. That means measuring what it says to measure, at the point it says to measure it, and writing it down the same day.

Say the inconvenient part: a common failure is not a bad batch, it is a good batch with no evidence. A product that was made correctly and cannot be shown to have been made correctly is, for practical purposes, the same problem.

References

21 CFR Part 114, Acidified Foods. Low-acid foods to which acid is added, water activity above 0.85, finished equilibrium pH 4.6 or lower reached within the time designated in the scheduled process. 114.3 excludes carbonated beverages, jams, jellies and preserves, foods stored, distributed and retailed under refrigeration, and acid foods including condiment sauces containing small amounts of low-acid food whose finished equilibrium pH does not significantly differ from the predominant acid. ecfr.gov
US Food and Drug Administration. Draft Guidance for Industry, Chapter 16: Acidified Foods. fda.gov
NC State Extension, Food Business. Acidified Foods Scheduled Processes "How To". foodbusiness.ces.ncsu.edu
FDA food canning establishment registration (Form 2541) and scheduled process filing (Form 2541e). One establishment registration plus a separate process filing for each product, process and container size.
Written from published extension guidance and federal publications, not from a laboratory. Your state's requirements and your own process govern anything general said here.