MacConkey Agar No. 3

Item No.  NCM0174A

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Expect availability 05/28/2021
Minimum quantity required: 1
This item must be ordered in multiples of one case. Quantity per case: 1
MacConkey Agar No. 3 is used for the cultivation of Enterobacteriaceae and is not intended for use in the diagnosis of disease or other conditions in humans. A modification recommended by the W.H.O. and the American Public Health Association for the isolation of Enterobacteriaceae from waters and sewage. The medium has been made more selective than MacConkey’s original formula by the use of crystal violet as well as bile salts. Gram positive organisms will not grow on this medium.
Analyte Enterobacteriaceae
Brand NEOGEN® Culture Media
Formula Liter
Peptone 20.0 g/L
Lactose 10.0 g/L
Bile Salt No.3 1.5 g/L
Sodium Chloride 5.0 g/L
Neutral Red 0.03 g/L
Crystal Violet 0.001 g/L
Agar 15.0 g/L
Grams per Litre 51.50
Litres per 500g 10.00
Mass 500 g
Package Dimensions 4.60 IN x 2.90 IN x 8.60 IN
Package Weight 1.35 LB
Plates per 500g 530.00
  1. Suspend 51.5 grams of the medium in one liter of purified water.
  2. Heat with frequent agitation and boil for one minute to completely dissolve the medium.
  3. Autoclave at 121°C for 15 minutes.
  4. Cool to 45-50°C.
Previous Item Number Product was previously known as LabM Product: LAB045 MacConkey Agar No 3



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