Informational:Informational:This product is animal origin and can only be shipped within the United States
Thermo Scientific Chemicals

LB Agar plate, Plain

20 Plates, Each
Thermo Scientific Chemicals

LB Agar plate, Plain

20 Plates, Each
Catalog number: J61525.EQF
also known as J61525-=F
Price (USD)
Agar is mixed with LB medium, autoclaved at 15 PSI (121°C) for 60 minutes, cooled to 52 to 50°C, poured onto petri-plates, polymerized and dry under sterile aseptic condition.
Appearance (Color)
Yellow to pale brown
Soft gel


A subtype of nutrient agar, this is the general medium for microbiology studies and may be used for routine cultivation of not particularly fastidious microorganisms. Also, does not preferentially grow one kind of bacteria over another.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

General Description

• LB agar plate is a nutrient-rich media frequently used to culture bacteria in the lab, including Escherichia coli


• LB agar plate is used to culture bacteria in microbiology research. These plates are commonly used during cloning experiments to amplify antibiotic-resistant, competent bacteria
• The addition of agar to LB medium helps form a gel that allows bacteria to grow. The bacteria cannot digest the agar but can obtain the needed nutrients to grow from the LB medium
• The addition of ampicillin (100 μg/mL) to these plates allows selection of the bacteria that can grow in the presence of ampicillin which is conferred by a plasmid carrying the antibiotic resistance gene

RUO – Research Use Only