The manufacturers of Citric Acid Solid Cooking have stated that the packaging is free from plastic.
Citric acid is a natural acid found in fruits such as lemons, limes, peaches, plums, grapefruit and oranges. It is responsible for the tart taste of many citrus fruits. It can be extracted by adding calcium oxide, which forms calcium citrate.
Citric acid promotes healthy digestion, may help to prevent urinary tract infections, and is a natural preservative. Probably the most popular acid for wine making adding a pleasant fruity flavour. It may also be used in soft drinks making and as a household descaler.
The acidic pH of citric acid also makes it useful as a preservative. Since many bacteria are unable to grow in an acidic environment, citric acid is often added to jams, jellies, candy, canned foods, and even meat products as a preservative.
Citric acid is a dry alternative to lemon juice or vinegar in dry foods such as seasoning salts, flavouring powders, and crunchy snacks.