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51405

MacConkey-Agar (without salt)

Name: MacConkey-Agar (without salt)
Brand: SIAL

NutriSelect^® Plus, powder, pH 7.4±0.2 (25 °C), for bacteria, pkg of 500 g, suitable for microbiology

Synonym(s):

MacConkey-Agar (without salt and crystal violet), Indicator medium, Low selective medium, MAC Agar

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About This Item

NACRES:

NA.85

UNSPSC Code:

41171606

Manufacturer/tradename:

NutriSelect^® Plus

Ph:

7.4±0.2 (25 °C)

Form:

powder

Suitability:

Acinetobacter spp., bacteria, selective and differential for Enterococcus spp., selective and differential for Escherichia coli, selective and differential for Proteus spp., selective and differential for Salmonella spp., selective and differential for Shigella spp., selective and differential for Staphylococcus spp., selective and differential for coliforms, selective and differential for enterobacteriaceae

Application(s):

clinical testing
environmental
food and beverages, microbiology

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Properties

sterility

non-sterile

Quality Segment

200

form

powder

shelf life

limited shelf life, expiry date on the label

composition

agar, 12 g/L , bile salts, 5 g/L , lactose, 10 g/L , neutral red, 0.075 g/L , peptone, 20 g/L

packaging

pkg of 500 g

manufacturer/tradename

NutriSelect^® Plus

technique(s)

microbiological culture: suitable

color

dark red

pH

7.4±0.2 (25 °C)

application(s)

clinical testing
environmental
food and beverages, microbiology

suitability

Description

General description

MacConkey-Agar (without salt) is a powdered, non-sterile differential medium designed for microbiological applications. It is formulated without salt and crystal violet, making it suitable for culturing a wide range of microorganisms. The medium consists of agar, bile salts, lactose, neutral red, and peptone, which provide essential nutrients and selective properties for bacterial growth.

Application

MacConkey-Agar (without salt) is used for the detection, isolation, and differentiation of coliforms and intestinal pathogens, including Escherichia coli, Salmonella, Shigella, Proteus, and other Enterobacteriaceae. It is particularly useful for culturing urine specimens that may contain large numbers of Proteus species, as the medium restricts their swarming behavior. This media is ideal for clinical testing, environmental monitoring, food and beverage safety, and general microbiological research.

Preparation Note

Suspend 47 g in 1 litre of distilled water. Bring to the boil to dissolve completely. Sterilize by autoclaving at 121°C for 15 minutes. Pour into sterile petri plates. Dry the surface of the gel before inoculation.

Other Notes

We offer two media types: the superior granulated GranuCult^® and the cost-efficient powdered NutriSelect^® culture media, depending on your needs.
The designations basic, plus, or prime are added to indicate the quality control level, from basic quality control to standard QC plus to prime for full regulatory compliance.

Legal Information

GRANUCULT is a registered trademark of Merck KGaA, Darmstadt, Germany

NutriSelect is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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