Noun
food preservative (plural food preservatives)
Any substance added to a processed food in order to extend its shelf life
For example, boric acid was widely used as a food preservative from the 1870s to the 1920s, citation citation but was banned after World War I due to its toxicity, as demonstrated in animal and human studies. Source: Internet
It can also act as a food preservative when used in sufficient concentrations. Source: Internet
Potassium bisulfite ( KHSOmain ) is used as a food preservative, for example in wine and beer -making (but not in meats). Source: Internet