Peptone water (CM0009B), Oxoid, is a basal medium that used as a growth medium or as the basis of carbohydrate fermentation media. A pure culture in Peptone Water is a convenient inoculum for a series of fermentation tubes or other diagnostic media.

Typical Formula*	gm/litre
Peptone	10.0
Sodium Chloride	5.0
pH 7.2 ± 0.2 @ 25°C