Propionic Acid

General Information (more on wikipidia)

 Molecular Weight (g/mol) Density (g/L) Radius (m) Reference Species Propionic Acid 74.08 990 R [1]

Propionic acid (systematically named propanoic acid) is a naturally occurring carboxylic acid with chemical formula CH3CH2COOH. In the pure state, it is a colorless, corrosive liquid with a pungent odor. The anion CH3CH2COO− as well as the salts and esters of propionic acid are known as propionates (or propanoates).

Propionic acid inhibits the growth of mold and some bacteria. Accordingly, most propionic acid produced is used as a preservative for both animal feed and food for human consumption. Can be used as a preservative for Ballistics Gel. For animal feed, it is used either directly or as its ammonium salt. In human foods, especially bread and other baked goods, it is used as its sodium or calcium salt. Similar usage occurs in some of the older anti-fungal foot powders.
Propionic acid is also useful as a chemical intermediate. It can be used to modify synthetic cellulose fibers. It is also used to make pesticides and pharmaceuticals. The esters of propionic acid are sometimes used as solvents or artificial flavorings.

Diffusion of in water:

• Alone at 25 degrees: $D = 1060 \ \mu m^{2} s^{-1}$ [1]

Diffusion of in cellular matrix:

Bibliography
1. Cussler, E. L. 1984. Diffusion - mass transfer in fluid systems. Cambridge University Press, Cambridge, United Kingdom.