Refrigerate opened tomato paste in an airtight container
Use within 5 to 7 days after opening
Freeze leftover tomato paste in small portions
Store frozen portions in a freezer-safe container or bag
Label containers with the date
Keep unopened cans or tubes in a cool, dry pantry
Transfer unused paste from a can to a clean container before refrigerating
Cover the surface tightly to reduce air exposure
Discard if it develops mold, off smells, or unusual color changes