Only situations with a published figure are listed. A blank isn't “forever” — it means no reliable number is published for it.
Storage
Store at: Cool, dry pantry unopened; refrigerate at 40°F (4°C) or below after opening
Refrigerate after opening: Yes — refrigerate at 40°F (4°C) or below
USDA FoodKeeper v128 tip (pantry storage): Refrigerating unopened jars will NOT lengthen shelf life.
How to tell if Tomato sauce (spaghetti, pizza) has gone bad
Mould around the rim, cap, or surface
An off, fermented, or yeasty smell
Fizzing, bubbling, or a bulging lid
Separation or a colour change that won't stir back in
USDA FoodKeeper v128 publishes no spoilage note for Tomato sauce (spaghetti, pizza) specifically, so these are the general signs for condiments & sauces — never taste something to test it. When in doubt, throw it out.
Air and warmth are what shorten an opened item's life — the right container buys back the days the packaging gives up once the seal's broken.
How long does Tomato sauce (spaghetti, pizza) last after opening?
About 3–5 days refrigerated at 40°F (4°C) or below, according to USDA FoodKeeper v128. Refrigerate it once it's open.
Does Tomato sauce (spaghetti, pizza) need to be refrigerated after opening?
Yes — keep Tomato sauce (spaghetti, pizza) at 40°F (4°C) or below once it's open. Cool, dry pantry unopened; refrigerate at 40°F (4°C) or below after opening.
How can you tell if Tomato sauce (spaghetti, pizza) is bad?
Look for: Mould around the rim, cap, or surface; An off, fermented, or yeasty smell; Fizzing, bubbling, or a bulging lid; Separation or a colour change that won't stir back in. Those are the general signs for condiments & sauces — USDA FoodKeeper v128 publishes no spoilage note for Tomato sauce (spaghetti, pizza) specifically. Never taste something to test it — when in doubt, throw it out.