How long doesPectinlast in the pantry once opened?

The methods the USDA actually rates for this item

The USDA rates only 1 of its nine storage methods for this item, and the pantry after opening is what it rates. The other 8 slots are blank, and a blank is not a zero: it means no published figure, not that the method fails.

Every storage figure the USDA publishes for this item

The USDA rates this item in the pantry and nowhere else, one of 84 foods of the 466 it files that way.

• In the pantryPackage use-by date
• Once opened · in the pantry1 month

Where the USDA answers in words instead of days

1 of the nine slots the USDA keeps for this item holds an answer that is not a number, and an answer in words is still an answer: in the pantry it answers with the package date rather than a number, and the use-by date printed on that particular package is the figure to go by.

Turning the range into a date

Two clocks run on this item: one from the day it went into storage and one from the day the seal broke. Both are listed below, 1 row in all.

• Once opened · in the pantryUse by1 month after the day you opened it

Is this window about safety or about taste?

The answer at the top of this page reads 1 month in the pantry once opened. The USDA rating this place at all is the USDA saying Pectin keeps there, so the figure rates how good it will be. Past it, judge it by look and smell: this window rates how good the food will be, not the day it becomes a hazard.

Every figure assumes the food was sound when you stored it, that your refrigerator holds 40 °F or below and your freezer 0 °F or below, and that the package was handled normally.

It is past the date. Now what?

Say the calculator above puts Pectin past its 1 month in the pantry once opened window. Past that the calendar stops deciding and the food itself does. A rancid, paint-like smell in a nut, an oil or a seed, mold around the neck of a bottle, or a swollen can mean it goes out whatever the date says.

The FoodKeeper entry this page is built from prints storage times and nothing else, so anything past them here is USDA and FSIS guidance rather than a figure from the source. The whole rule, including the cases the source does not cover, is set out under what to do when the date has passed.

Is that a long time?

Among the 70 items the USDA files under Shelf Stable Foods, this item ranks 68 by how long it keeps outside the freezer. Potato chips holds 2 months, Roasted nuts (peanuts, cashews, almonds) holds 4 weeks. Among the 244 foods the USDA also gives a pantry figure, it keeps longer than 21% of them.

Items that behave the same way

The 6 items below are the closest match to this item by storage behavior, running 7 days to 5 months and bracketing its 1 month.

• Roasted nuts (peanuts, cashews, almonds)keeps 4 weeks in the fridge once opened
• Polentakeeps 5 days in the fridge once openedshelf-stable
• Potato chipskeeps 1 week in the pantry once openedup to 2 months sealed in the pantry
• Cashew butterkeeps 3 months in the pantry
• Pine nutskeeps 3 months in the fridge
• Marshmallow crèmekeeps 1 month in the pantry once openedup to 5 months sealed in the pantry

Products the USDA rates in the same places

Only 3 other products in the whole file carry the same set of rated places as this one, pantry after opening: Cereal, dry mixes, Cocoa and cocoa mixes and Sugar. That is 3 products out of 466, which makes this a rare shape of record rather than a common one, and it is worth knowing that the comparison below is drawn from a very small group. Of the 3 shown, 2 keep longer than this one. The longest-keeping of them is Sugar at 24 months. Counted more loosely, by which of the three places are rated at all, 84 products match this one.

• Cereal, dry mixes1 month in the pantry once opened
• Cocoa and cocoa mixes1 year in the pantry once opened
• Sugar18 months in the pantry once openedgranulated

Closest by shape, but not an exact match — they share most of these places, not all of them.

• Roasted nuts4 weeks in the fridge once opened
• Potato chips1 week in the pantry once openedup to 2 months sealed in the pantry
• Marshmallow crème1 month in the pantry once openedup to 5 months sealed in the pantry
• Fruits, dried6 months in the fridge once opened
• Crackers3 months in the fridge once openedup to 8 months sealed in the pantry

The rest of the Shelf Stable Foods shelf

The USDA puts this product on the Shelf Stable Foods shelf together with 69 others, and 67 of them keep longer outside the freezer. The shelf runs from Coconut cream at 5 years down to Polenta at 7 days. Nearest this product by window are Roasted nuts, Polenta and Potato chips, which is the order the list below is printed in. Across the whole of Shelf Stable Foods the same product ranks 68 of 70. The middle of the shelf is Sunflower oil, at 1 year. 5 products on this shelf publish no window outside the freezer and stay out of the order.

• Roasted nuts4 weeks4 weeks in the fridge once opened
• Polenta7 days5 days in the fridge once opened
• Potato chips2 months1 week in the pantry once opened
• Cashew butter3 months3 months in the pantry
• Pine nuts3 months3 months in the fridge
• Pork rinds4 months4 months in the pantry
• Marshmallow crème5 months1 month in the pantry once opened
• Fruits, dried6 months6 months in the fridge once opened

If it has to keep longer than this

If it has to keep longer than 1 month, the Shelf Stable Foods aisle gives 67 products that hold at least twice as long outside the freezer. The smallest step up is Potato chips at 2 months against this one's 1 month; after it come Cashew butter, Pine nuts and Pork rinds. They are printed below in the order the step gets bigger, not alphabetically. In the other direction, 1 entry in the category keeps half as long or less, Polenta among them. The largest step the category offers is Sesame seeds at 5 years.

• Potato chips2 months1 week in the pantry once opened
• Cashew butter3 months3 months in the pantry
• Pine nuts3 months3 months in the fridge
• Pork rinds4 months4 months in the pantry
• Marshmallow crème5 months1 month in the pantry once opened
• Fruits, dried6 months6 months in the fridge once opened
• Cashews6 months6 months sealed in the fridge
• Roasted red peppers6 months4 months in the fridge

The record this page is built from

This page is built from a single FoodKeeper row, record 388 — the source’s own number for it, not a position — one of the 661 rows in the snapshot. That row fills 1 of the nine storage slots with a time, and the binding figure on it is printed by the source in months, which is the unit this page keeps rather than converting it to days. 1 slot is answered in words instead of days, and printed as the source wrote it.

Where these numbers come from

Every range on this page is published by the USDA FoodKeeper and reproduced unchanged. The multipliers, the rankings, the percentages and the dates are ours, computed from those ranges. Where the source gives a span such as 3 to 5 weeks, comparisons use the upper figure, and the full span is always printed.

Rankings cover only the items the USDA gives a usable figure for, and identical ranges share a place rather than being ordered arbitrarily. Neighbors are chosen by nearest storage time within the same category, never alphabetically: two foods filed next to each other by name usually have nothing to do with each other. The freezer is excluded from ranking because it flattens almost everything.

Where the USDA lists several kinds under one name, they share one page here and every kind keeps its own windows: the source prints them as separate rows, and a page that merged them would be inventing a figure the source never published. Comparisons and the place in the category are computed for the kind the plain name means — the shell egg for eggs, the can for tuna — which is settled name by name rather than by the order the source lists its rows in, and the page names it. Where the plain name means no single kind, the page prints no single figure at all and lists the kinds instead.

Source: USDA FoodKeeper, retrieved 1 September 2026. This site computes every comparison on this page and takes responsibility for it. Found a figure that does not match the source? Tell us on the contact page, with the page and the row — the parsing is mechanical, so a mismatch is our bug and we want it. How the whole site is built, which figures are ours and where the source can be checked is on the method page.

KeepsUntil is an independent reference built on public USDA data. It is not affiliated with, endorsed by, or connected to the U.S. Department of Agriculture or the Food and Drug Administration. Whether a given window is a safety limit or a quality window is stated on the page that prints it.