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Propionic acid - is a naturally occurring carboxylic acid with chemical formula CH3CH2COOH. It is a clear liquid with a pungent and unpleasant smell somewhat resembling body odor.
P 2607 (OTTO) Propionic acid, GR 99%+ Cas 79-09-4 - used to alter limestone in order to increase its ability of CO2 uptake.