L-lactic acidL-lactic acid
80%, 85% content, liquid 
It is a transparent to slightly amber liquid with a mild taste widely used as pH corrector and preservative in the food industry. 
It is registered in Europe as a food additive with the reference E270. In the USA, lactic acid has the status of GRAS (Generally Recognized as Safe). 
Lactic acid is used by the food industry (as a natural preserving agent), by the pharmaceutical industry (as a vector of indispensable minerals or as injectable solutions), by the cosmetic industry (as moisturizing agent) and for numerous other industrial applications. It is the raw material used for producing PLA.