Tomato Purée.

Once opened, tomato purée typically lasts 5 to 7 days in the refrigerator. Always transfer it from a tin can to a glass or plastic container.

Yes, it freezes very well. You can freeze it in airtight containers or ice cube trays for up to 3 months.

Tomato purée is a thick liquid made by cooking and straining tomatoes. Tomato paste is much thicker and more concentrated, having been cooked down significantly longer.

You can mix 1 part tomato paste with 1 part water, or blend canned whole tomatoes until smooth.

In some ways, yes. The cooking process used to make purée increases the bioavailability of lycopene, though it may lose some heat-sensitive Vitamin C.

Look for signs of mold, a sour or off smell, or a significantly darkened color. If the container is bulging, discard it immediately.

Many commercial brands add salt as a preservative. Always check the label if you are monitoring your sodium intake.

Yes, it has a pH between 4.0 and 4.5. Adding a small amount of baking soda or sugar can help neutralize the acidity in recipes.