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Preservatives
Preservatives are ingredients that either retard the growth of microorganisms or kill them. If used correctly they can prevent food poisoning and control food spoilage.

ABSOLUTE Ingredients offers two preservatives: Sodium Benzoate and Potassium Sorbate. Both preservatives are generally effective against most yeasts and moulds.
Product list - Preservatives
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Potassium Sorbate 1kg Potassium Sorbate 1kg $30.00
CODE: POTSORB-1 :: Details
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Potassium Sorbate Potassium Sorbate $110.00
CODE: POTSORB-5 :: Details
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Sodium Benzoate 5 kg Sodium Benzoate 5 kg $50.00
CODE: SODBENZ-5 :: Details
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Using Acidulants
Preservatives are usually used in conjunction with other food preservation methods, such as heat and acid.
Sorbic acid and Potassium Sorbate are effective against yeast and mould, but have little activity against bacteria. Sorbic acid is often used in bakery applications. However sorbic acid is very difficult to dissolve in water while Potassium Sorbate is readily soluble, and is therefore more commonly used. Potassium Sorbate needs to be used in slightly acid conditions (ideally below pH 5.5) to allow it to dissociate into sorbic acid and have the desired effect.
Benzoic acid and sodium benzoate are effective against yeast and mould but need to be used in food systems with a pH below 4.0.
Please consult the Food Standards code for information on the maximum permissible levels of sorbic and benzoic acid in food products.