Unless you properly "preserve" it by properly heat canning it, you should store it in the fridge for up to a week. I would not put it in the cupboard!
Homemade tomato sauce can last for about 5-7 days when stored properly in the refrigerator.
The only ways to keep homemade sauces for a long time without spoiling is either by home canning or by freezing.
Tomato sauce should be water bathed for about 40-45 minutes for optimal preservation.
cooked tomato sauce will last a weekbut some last less than a weekprobably about 2 daysyou should try the del Monte cooked tomato ketchup which lasts for 3 years
Tomato sauce can be stored in the fridge for up to 5-7 days before it goes bad.
Once opened, tomato-based sauces are only good for five days to a week. Don't wait for the mold to form. In many cases, you won't see the mold in the sauce after five days, but it actually could be there. Some mold produce toxins that can be harmful, so why take the risk? Mold grows in very wet environments. What promotes the mold is the high moisture content. No amount of cooking will kill the toxins. So, to be safe, you need to throw it away.
Tomato sauce can taste bitter due to the presence of compounds called alkaloids in tomatoes, which can develop a bitter taste when cooked for too long or at high temperatures. Additionally, overripe or spoiled tomatoes can also contribute to a bitter flavor in tomato sauce.
Tomato sauce should be cooked for at least 30 minutes to 1 hour for optimal flavor and consistency. This allows the flavors to meld together and the sauce to thicken properly.
Depending on the acidity of the tomato sauce, or whether artificial preservatives have been added, tomato sauce can be left out at room temperature (68-72 degrees Fahrenheit) for 2-5 days. Home made tomato sauce is likely to have little to no artificial preservatives, but is preserved by the acidity of the tomatoes, the added salt, and various herbs added. Therefore, in my experience, homemade tomato sauce has not gone bad until the third night, assuming that the tomato sauce was made on the first morning. Store-bought tomato sauce may have ascorbic acid, vinegar and/or other preservatives added that allow the tomato sauce to be left out unopened for an undefined amount of time. When opened, the tomato sauce will not be affected for several days. Several of my friends never refrigerate their store-bought tomato sauce, because they use up the entire bottle within the week. However, if the tomato sauce has been excessively handled or contaminated, it may spoil withing 12 hours.
Homemade tomato sauce with sausage can be safely stored in the refrigerator for about 3 to 4 days. Make sure to let it cool to room temperature before transferring it to an airtight container. If you need to keep it longer, consider freezing it, where it can last for up to 3 months. Always check for signs of spoilage before consuming.
To prevent mold from forming on your tomato sauce, make sure to store it in a clean, airtight container in the refrigerator. Additionally, use clean utensils when serving the sauce and avoid leaving it out at room temperature for too long.
Your tomato sauce may be watery because it has too much liquid from the tomatoes or other ingredients, or it may not have been cooked long enough to thicken properly. You can try simmering it uncovered to help reduce the liquid and thicken the sauce.