Medium 3 (Penassay Broth) 250g for microbiological antibiotic potency testing

Antibiotic Medium No. 3 – Penassay Broth for Antibiotic Potency Testing

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Product Overview

Antibiotic Medium No. 3, also known as Penassay Broth, is a dehydrated liquid culture medium developed for the microbiological determination of antibiotic potency.
The formulation supports uniform microbial growth and is suitable for broth-based antibiotic assay methods.

This medium is referenced to USP guidelines and supplied in powder form, offering consistent quality, convenient preparation, and long-term stability for routine laboratory use.


Key Features

  • Designed for microbiological antibiotic potency testing

  • Broth medium suitable for liquid-based assay methods

  • Referenced to USP guidelines

  • Dehydrated powder for easy preparation and storage

  • Reliable and reproducible laboratory performance


Applications

  • Antibiotic potency determination

  • Microbiological assay of antibiotics

  • Quality control testing

  • Laboratory research and analysis

✅ Product Specifications

  • Product Name: Antibiotic Medium No. 3
  • Alternative Name: Penassay Broth
  • Form: Dehydrated powder
  • Package Size: 250 g / bottle
  • Storage Condition: Room temperature
  • Shelf Life: 3 years
  • Reference Standard: USP
  • Final pH (25°C): 7.0 ± 0.05

✅ Composition (per liter)

ComponentQuantity
Peptone5.0 g
Yeast Extract1.5 g
Beef Extract1.5 g
Sodium Chloride3.5 g
Dextrose1.0 g
Dibasic Potassium Phosphate3.68 g
Monobasic Potassium Phosphate1.32 g

✅ Preparation Instructions

  1. Suspend 17.5 g of the product in 1 liter of distilled or deionized water.
  2. Heat to boiling until completely dissolved.
  3. Dispense into suitable containers.
  4. Sterilize at 121°C for 15 minutes or 115°C for 30 minutes.
  5. Allow to cool and store for use.

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