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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Potassium lactate is a compound with formula KC3H5O3, or H3C-CHOH-COOK. It is the potassium salt of lactic acid. It is produced by neutralizing lactic acid which is fermented from a sugar source. It has E number "E326". Potassium lactate is a liquid product that is usually 60% solids but is available at up to 78% solids.
Potassium lactate is commonly used in meat and poultry products to extend shelf life and increase food safety as it has a broad antimicrobial action and is effective at inhibiting most spoilage and pathogenic bacteria. 
Potassium lactate is also used as an extinguishing medium in the First Alert Tundra fire extinguishers. 
- PURASAL http://www.purac.com/EN/Food/Brands/Potassium_lactate.aspx
- Meat and Poultry. http://www.purac.com/EN/Food/ingredients/Meat_poultry_and_fish.aspx
- MSDS for First Alert Tundra http://www.firstalert.com/pdfs/2010/02/25/3f59f99c.pdf
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