How long is tomato sauce good for? (5 signs of spoilage)

In this article, we will answer the question “How long is tomato sauce good for?” and discuss what affects the shelf life of tomato sauce, how to know If the tomato sauce has gone bad and if you can eat tomato sauce after the expiration date.

How long is tomato sauce good for?

Tomato sauce may be good for a period of some days to many years, depending on the type of tomato sauce and the storage conditions used (2, 4). The exact shelf life of tomato sauce is difficult to predict, as it depends on many other factors.

The estimated shelf life of tomato sauce is given in the table below (2):

Type of tomato sauce  Storage condition 
In the pantry (unopened) In the fridge (opened) In the freezer (opened)
Can or glass jar up to 2 years 4 days 2 months
Can homemade (canned according to recommendations of the USDA) up to 1 year 3 to 4 days 2 months
Homemade (not canned, leftover) 2 hours 3 to 4 days 2 months

How to know if tomato sauce has gone bad?

To know if tomato sauce has gone bad, you should carefully inspect the organoleptic aspects of the food and look for possible signs indicating spoilage. The main spoilage indications are (3, 4):

  • The generation of off-odours and off-flavours that are characterised as bitter, rancid, fermented, alcoholic, sour or metallic
  • The growth of mould on the surface, which can be detected by coloured spots or mycelia
  • The formation of a biofilm on the surface or a watery or slimy texture
  • Discolouration, with a loss of the red colour (loss of lycopene) or intense darkening, due to Maillard reactions during prolonged storage
  • Bloating of the package or can, indicating fermentation with the production of gas

In the case of canned tomato sauce, do not consume it if the can is roasted or dented, or if leakage is noticeable.

What affects the shelf life of tomato sauce?

The shelf life of tomato sauce is affected, as mentioned in the previous section of this article, by the storage temperature and the type of tomato sauce, that is, if it is homemade or industrialised, or if is canned or not.

In addition to these factors, the following factors are also important to be mentioned (3, 4):

The shelf life of tomato sauce be improved with the addition of ingredients containing natural antioxidants, such as chilli pepper, which contains capsaicin, an antimicrobial compound;

The addition of chemical food preservatives, such as potassium sorbate, can reduce the risks of microbial spoilage;

The packaging used to preserve tomato sauce may affect the shelf life, as a light barrier (in the case of pouches) can reduce the negative effects of light exposure, such as lycopene degradation and oxidation;

The hygienic condition of the cooking place and the cooking practices for the production of the tomato sauce can affect the shelf life, as improper handling and insufficient sanitation may lead to microbial contaminations.

Can you eat tomato sauce after the expiration date?

Yes, you can eat tomato sauce after the expiration date, if there are no signs of spoilage in the product. Food can be usually consumed after the expiration date, although alterations of the flavour and loss of quality are expected (1).

However, there are possible risks involved in the consumption of expired tomato sauce, if the tomato sauce is spoiled. Food outbreaks related to the consumption of tomato sauce have been reported in studies (4, 5).

Spoilage caused by yeasts, moulds and pathogenic bacteria can occur in tomato sauce, despite the acidic characteristic of the product.

Staphylococcus aureus is an example of a pathogenic bacteria that produces a food toxin that causes vomiting, diarrhoea and dizziness and can be found in homemade tomato sauce as a consequence of poor handling or improper storage of the food (5).

Another example is spore-forming bacteria, such as Bacillus coagulans, which resist thermal treatments and may develop in stored tomato sauce, as soon as the conditions are favourable (4).

Other FAQs about Sauces which you may be interested in.

How long does Pasta Sauce last in the fridge?

How to open a pasta sauce jar?

How to tell If tomato sauce is bad?

Conclusion

In this article, we answered the question “How long is tomato sauce good for?” and discussed what affects the shelf life of tomato sauce, how to know If the tomato sauce has gone bad and if you can eat tomato sauce after the expiration date.

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References

1.-

Usda.gov. [cited 2023 Sep 14]. Available from: https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/food-safety-basics/food-product-dating

2.-

Usda.gov. [cited 2023 Sep 14]. Available from: https://www.fsis.usda.gov/shared/data/EN/FoodKeeper-Data.xls

3.-

Nkhata SG, Ayua EO. Quality attributes of homemade tomato sauce stored at different temperatures. African Journal of Food Science. 2018 May 31;12(5):97-103.

4.-

Sperber WH. Microbiological spoilage of acidified specialty products. Compendium of the microbiological spoilage of foods and beverages. 2009:285-99.

5.-

Carmo LS, Dias RS, Linardi VR, Sena MJ, Santos DA. An outbreak of staphylococcal food poisoning in the municipality of Passos, MG, Brazil. Brazilian Archives of Biology and Technology. 2003;46:581-6.