How long does Salad dressing (vinaigrette) last after opening?

Updated 2026-08-07 · Free · No sign-up

Once opened, Salad dressing (vinaigrette) keeps about 4 weeks in the fridge. Unopened, it keeps about 6 months.

Source: USDA FoodKeeper v128 · Category: Condiments & sauces

How long Salad dressing (vinaigrette) keeps

SituationKeeps for
Unopened · pantry6 months
Opened · fridge4 weeks

Only situations with a published figure are listed. A blank isn't “forever” — it means no reliable number is published for it.

Storage

How to tell if Salad dressing (vinaigrette) has gone bad

These are the general spoilage signs for condiments & sauces — never taste something to test it. When in doubt, throw it out.

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FAQ

How long does Salad dressing (vinaigrette) last after opening?

About 4 weeks refrigerated at 40°F (4°C) or below, according to USDA FoodKeeper v128. Refrigerate it once it's open.

Does Salad dressing (vinaigrette) need to be refrigerated after opening?

Yes — keep Salad dressing (vinaigrette) 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 Salad dressing (vinaigrette) 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. Never taste something to test it — when in doubt, throw it out.

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