Bacteriological Agar

Your Premier Bacteriological Agar Supplier

What is Bacteriological Agar?

Agar is a natural hydrocolloid extracted from several species of red algae, mainly the Gelidium, Gracilaria, and Pterocladia types.

Agar was first suggested for microbiological purposes in 1881 by Fannie Hesse. By the early 1900s, agar became the gelling agent of choice over gelatin because agar remains firm at growth temperature for many pathogens and agar is generally resistant to a breakdown by bacterial enzymes. The use of bacteriological agar in microbiological media significantly contributed to the advance of microbiology, paving the way to study pure cultures.

Gino Biotech Bacteriological Agar is made from selected gelidium and gracilaria, and used as coagulants in the microbial medium.


Bacteriological Agar | Table of Contents

Bacteriological Agar Properties

  • Agar is a gel at room temperature, remaining firm at temperatures as high as 65°C
  • Agar melts at approximately 85 - 91°C, a different temperature from solidification at 34 - 36°C. This property is known as hysteresis.
  • Agar is generally resistant to shear forces;

Bacteriological Agar Advantages

Bacteriological Agar includes good clarity, controlled gelation temperature, controlled melting temperature, good diffusion characteristics, absence of toxic bacterial inhibitors, and the relative absence of metabolically useful minerals and compounds.

Bacteriological Agar is recommended for clinical applications, auxotrophic studies, bacterial and yeast transformation studies, and bacterial molecular genetics applications.




Off-white to yellowish powder


≤ 12 ﹪

Total Ash

≤ 5 ﹪

Gel-strength (Nikkan Method)

700-1200 g/cm2


4 - 8

Mesh size

80 - 100

Starch & Dextrin

Not detectable

Gelatin and other proteins

Not detectable

Water insoluble matter

≤ 1 ﹪

Acid insoluble matter

≤ 0.5 ﹪


≤ 5 ppm


≤ 2 ppm


≤ 1 ppm


≤ 1 ppm


Total plate count

≤ 5000 cfu/g

Yeast & Mold

≤ 300 cfu/g


Absent in 5 g


Absent in 5 g


Technical Data Sheet

Click the right button to download the full TDS of Agar Agar Powder.

Packaging, Storage and Shelf Life

As a professional and responsible bacteriological agar powder supplier in China, Gino Biotech not only provides customized products but also flexible packaging solutions.  We will help you boost your business and make you stand out from the competition by offering you custom packaging. 

Carton Box

Carton Box_Gino Biotech_Hydrocolloid Suppliers

Fiber Drum

Fiber Drum_Gino Biotech_Hydrocolloid Suppliers

Tin Box

Square Tin Box_Gino Biotech_Hydrocolloid Suppliers

Kraft Bag

Kraft Paper Bag_Gino Biotech_Hydrocolloid Suppliers

PP Woven Bag

PP Woven Bag_Gino Biotech_Hydrocolloid Suppliers

Store away from heat and moisture, preferably in a cool and dry place. The product, Bacteriological Agar, when stored in these conditions and in its original unopened packaging, will maintain its initial properties for 24 months.

Bacteriological Agar Applications

The Bacteriological Cultures_bacteriological agar

Bacteriological Agar is recommended for clinical applications, auxotrophic studies, bacterial and yeast transformation studies, and bacterial molecular genetics applications.

This product is a gelling agent used in the preparation of culture media for microbial growth and other bacteriological applications, it is used for different microbiological applications, being the basic ingredient in the preparation of plaque diagnostic culture media.

Culture media and other bacteriological applications, Plant tissue culture, Dental mold, Pharmaceutical preparations.

Suggested Use Level | Guidelines for Use

It is used in culture media in the following concentrations:

  • For Routine Media:1.4 % - 1.6 % ,
  • For Soft Media: 0.5 %,
  • For Semi-solid Media: 0.15 %,
  • For Media with Reduced Oxygen Tension: 0.05 % - 0.1 %,
  • For Extra Hard Gels, for inhibiting swarming of Proteus species: 2.5 % - 3.0 %

Others You May be Interested in Bacteriological Agar

Contact Form

Gino Biotech will always be your best supplier and a good partner for agar agar and other hydrocolloids from China.

Contact Henan Gino Biotechnology Co., Ltd. for Technical Service or questions involving Agar Agar or ask at [email protected]


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